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Directorate of OperationalSlide 1 of 70

737-300/400

AUTOMATIC FLIGHT(Non-EFIS Panels)

NextMain Menu Quit

This 737-300/400 Systems CD was created with the goal of thoroughly reviewing aircraft systems only (fuel,

electrical, hydraulics etc.). As a courtesy, our developers have included this Automatic Flight presentation,

which is a very brief description of the Mode Control Panel (MCP), Autopilot and Autothrottle. If you desire a

detailed presentation on the Automatic Flight system, we recommend purchasing software which is

dedicated to this subject matter. Thank you!
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Instrument Panels

Mode Control Panel (MCP)


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The MCP provides the pilots with a central control panel to operate the autopilots (A/P),

autothrottle (A/T), and flight directors (F/D).

The Autopilot Flight Director System (AFDS) is a dual system consisting of two individual flight

control computers (FCCs) and a single mode control panel (MCP).

See picture of

flight control computers
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The switches on the panel are pressed to select desired command modes. When selected,

the switch illuminates to indicate that the mode has been selected. Illumination of the switch

also indicates that the mode can be deselected by pressing the switch again. While a mode

is active, it is possible for de-selection of that mode to be automatically inhibited. This is

indicated by the respective switch being extinguished.

When engagement of a mode would be in conflict with the current operation, pressing the

switch has no effect. All modes can be disengaged either by selecting another mode or by

disengaging the A/P and turning the F/Ds off.


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Mode Control Panel (MCP)Speed Controls

The A/T system provides automatic thrust control from the beginning of takeoff, through climb,

cruise, descent, approach, and landing or go-around. Both thrust levers incorporate a separate

servo motor. The A/T system automatically moves the thrust levers forward and aft via these

servo motors.

Manually repositioning the thrust levers does not cause A/T disengagement unless 10 of thrustlever separation is exceeded during a dual channel approach after FLARE armed is annunciated.

Following manual repositioning, the A/T system may automatically reposition the thrust levers to

comply with computed thrust requirements, except while in the THR HLD and ARM modes.


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A/T ARM Switch:

ARM

Arms the A/T for engagement. Switch is magnetically held in the ARM position. With the switch in

the ARM position, the A/T will engage automatically when the following modes are engaged: LVL

CHG, ALT ACQ, V/S, VNAV, ALT HOLD, G/S capture, and TO/GA.

OFFDisengages A/T and prevents automatic A/T engagement.

Any of the following actions or conditions will automatically disengage the A/T:

Moving the A/T ARM switch to OFF.

Pressing either A/T disengage switch.

Two seconds have elapsed since touchdown.

Thrust levers separate more than 10 during a dual channel approach (after FLARE armed is annunciated).

The A/T system has detected a fault.


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Autothrottle Indicator Light:

Illuminated

A/T ARM switch in the ARM position.





IAS/MACH Display:

Displays speed selected by speed selector.

Displays 110 knots when power is first applied.

Display is blank when:

VNAV mode is engaged

A/T engaged in FMC SPD mode During a two engine automatic go-around

Display range is:

110 KIAS to Vmo in 1 knot increments

.60M to Mmo in .01M increments





MCP Speed Condition Symbols:

Overspeed or underspeed limiting symbols appear when commanded speed cannot be achieved.

Underspeed limiting (flashing A character):

minimum speed

Overspeed limiting (flashing 8 character):

Vmo or Mmo limit Landing gear limit

Flap limit





Speed Selector:

Rotate

Sets speed in IAS/MACH display and positions airspeed cursor.

Selected speed is reference speed for A/T.

Not operative when IAS/MACH display is blank.





C/O (change over) Switch:

Changes IAS/MACH display from IAS to MACH, and visa-versa.

Automatic changeover occurs at approximately FL260.





The N1 mode signals the A/T to maintain thrust at the N1 selected from the FMC CDUs. The

N1 mode will automatically engage when engaging LVL CHG in a climb (except for first 2.5

minutes after liftoff) or when engaging VNAV in a climb.

N1 Switch:

Push (with light currently not illuminated) Illuminates N1 switch light.

Engages A/T in N1 mode if compatible with modes already engaged.

Annunciates N1 on the A/T portion of the flight mode annunciator.

Push (with light currently illuminated)

Engages A/T in ARM mode.

Deselects N1 mode and extinguishes N1 switch light.





The SPEED mode signals the A/T to maintain the speed selected in the IAS/MACH display, or

a performance or limit speed. The SPEED mode will automatically engage when ALT ACQ

engages, ALT HOLD engages, V/S engages, or G/S capture occurs.

SPEED Switch:

Push (with light currently not illuminated) Illuminates SPEED switch light.

Engages A/T in SPEED mode if compatible with modes already engaged.

Annunciates MCP SPD on the A/T portion of the flight mode annunciator.

Push (with light currently illuminated)

Engages A/T in ARM mode.

Deselects SPEED mode and extinguishes SPEED switch light.


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Mode Control Panel (MCP)Vertical Navigation

The VNAV (vertical navigation) mode commands the AFDS to fly the vertical profile selected on

the FMC CDUs by controlling the A/T and aircraft pitch. The vertical profile includes climb,

cruise, descent, speeds, and can also include waypoint altitude constraints.

VNAV Switch:

Push Illuminates VNAV switch light.

Annunciates VNAV SPD or VNAV PTH on the AFDS portion of the flight mode annunciator.

Annunciates FMC SPD, N1, RETARD, or ARM on the A/T portion of the flight mode annunciator.

IAS/MACH display blanks and airspeed cursors are positioned to FMC commanded speed.


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The LVL CHG (level change) mode coordinates pitch and thrust commands to automatically climb

and descend to pre-selected altitudes at pre-selected airspeeds.

LVL CHG Switch:

Push

Illuminates LVL CHG switch light. Annunciates MCP SPD, for climb or descent, on the AFDS portion of the flight mode annunciator.

Annunciates N1 for climb, and RETARD followed by ARM for descent, on the A/T portion of the

flight mode annunciator.

IAS/MACH display and airspeed cursors move to target speed.


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ALTITUDE Display:

Displays selected altitude.

Displayed altitude is reference for altitude alerting and automatic level-offs.

Altitude range is 0 to 50,000 feet, in increments of 100 feet.

Displays previously selected altitude when power is first applied.


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ALTITUDE Selector:

Sets altitude in ALTITUDE display in increments of 100 feet.

Arms V/S mode if, while in the ALT HOLD mode at selected altitude, a new MCP altitude is

selected which is more than 100 feet from current altitude.


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The ALT HLD (altitude hold) mode commands pitch to hold either the MCP selected altitude or the

uncorrected barometric altitude at which the ALT HLD switch was pressed (if not at MCP altitude).

ALT HLD Switch:

Push

Illuminates ALT HLD switch light.

Engages ALT HLD mode.

Commands pitch to hold uncorrected barometric altitude at which switch was pressed.

Annunciates ALT HLD on the AFDS portion of the flight mode annunciator.

Note: ALT HLD mode is inhibited after glideslope capture.


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The V/S (vertical speed) mode commands pitch to hold the selected vertical speed and engages

the A/T in SPEED mode to hold selected airspeed. V/S has both an armed and engaged state.

The V/S mode automatically arms if the aircraft is currently in the ALT HLD mode at the selected

MCP altitude, and a new MCP altitude is selected which is more than 100 feet from current altitude.

With V/S now armed, V/S may be engaged by simply rotating the vertical speed thumbwheel.

Caution: Vertical speeds may be selected which command the aircraft away from desired altitude.

V/S Switch:

Push

Illuminates V/S switch light.

Arms or engages V/S mode.

Commands pitch to hold vertical speed.

Engages A/T in SPEED mode to hold selected vertical speed.

Annunciates V/S on the AFDS portion of the flight mode annunciator.


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VERT SPEED Display:

Displays -

Blank when V/S mode is not active.

Present V/S when V/S mode is engaged by pressing V/S switch.

Selected V/S when V/S is set by rotating vertical speed thumbwheel.

Range is from7,900 fpm to +6,000 fpm.

Displays in increments of

50 fpm if V/S is less than 1,000 fpm.

100 fpm if V/S is 1,000 fpm or greater.


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VERT SPEED Thumbwheel:

Rotate

UP

Sets V/S in VERT SPEED display.

Increases rate of ascent or reduces rate of descent.

DOWN

Sets V/S in VERT SPEED display.

Increases rate of descent or reduces rate of ascent.


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Mode Control Panel (MCP)Lateral Navigation

The LNAV (lateral navigation) mode commands the AFDS to intercept and track the active FMC

route. The route is entered and modified via the FMC CDUs and can include SIDs, STARs, and

instrument approaches. After pressing the LNAV switch, LNAV will engage if an active route has

been entered in the FMC and the aircraft is within 3 NM of the route segment (aircraft heading is

not a factor when within 3 NM of the active route segment). When outside of 3 NM, the aircraft

must be on a intercept course of 90 or less and intercept the route segment before the active

waypoint, in order for LNAV to capture.

LNAV Switch:

Push

Illuminates LNAV switch light.

Commands AFDS roll to intercept and track the active FMC route.

Annunciates LNAV on the AFDS portion of the flight mode annunciator.


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The VOR LOC (VOR/LOCALIZER) switch selects the VOR mode if a VOR frequency is tuned or

selects LOC mode if a localizer frequency is tuned. The VOR mode provides roll commands to

track the selected VOR course. The LOC mode provides roll commands to track the selected

localizer course along the inbound front course bearing. The selected course may be intercepted

while engaged in either LNAV, HDG SEL, or CWS R (if an A/P is engaged in CMD).

VOR LOC Switch:

Push

Illuminates VOR LOC switch light.

Commands AFDS roll to capture and track selected VOR or LOC course.

Annunciates VOR LOC armed or engaged on the AFDS portion of the flight mode annunciator.

Note: Localizer backcourse tracking is not available.


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HEADING Display:

Displays selected heading.

Same heading as HSI heading bug.


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HEADING Selector:

Rotate

Sets heading in HEADING display.

Positions heading bug on both the Captains and First Officers HSI.


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Bank Angle Selector (square knob behind HEADING selector):

Rotate

Sets maximum bank angle for operation in HDG SEL or VOR modes.

Bank angle may be set to to 10, 15, 20, 25, or 30.


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The HDG SEL mode commands the aircraft to turn to and maintain heading shown in the HEADING

display. Initial selection of the HDG SEL switch commands the aircraft to turn in the shortest

direction toward selected heading. If HDG SEL mode is currently engaged, roll commands are

given to turn the aircraft in the same direction as rotation of the heading selector. HDG SEL mode

automatically disengages upon capture of selected radio course in the VOR LOC and APP (VOR

LOC armed) modes.

HDG SEL Switch:

Push

Illuminates HDG SEL switch light.

Engages HDG SEL mode to follow selected heading.

Annunciates HDG SEL engaged on the AFDS portion of the flight mode annunciator.


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COURSE Display:

Displays course set by course selector.

Note: Setting two different courses in the COURSE display, and two different frequencies on the

VHF NAV receivers, may result in disagreement between the Captains and First Officers F/D

displays and may also affect A/P operation.


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COURSE Selector:

Sets course in COURSE display for respective VHF NAV receiver, FCC, and HSI.

Rotating the Captains course selector provides selected course information to the No. 1 VHF NAV

receiver, A FCC, and Captains HSI course pointer and course deviation bar.

Note: In the VOR LOC or APP mode, the A A/P and Captains F/D use selected course andnavigation data from the No. 1 VHF NAV receiver.

Rotating the First Officer's course selector provides selected course information to the No. 2 VHF

NAV receiver, B FCC, and First Officer's HSI course pointer and course deviation bar.

Note: In the VOR LOC or APP mode, the B A/P and First Officer's F/D use selected course and

navigation data from the No. 2 VHF NAV receiver.


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Mode Control Panel (MCP)Lateral and Vertical Navigation

The APP (approach) mode arms the AFDS to capture and track the localizer and glideslope.

APP can be engaged for single or dual A/P operation. One VHF NAV receiver must be tuned to an

ILS frequency before the APP mode can be engaged. For dual A/P operation, both VHF NAV

receivers must be tuned to the ILS frequency and both A/Ps must be selected to CMD (command)

prior to 800 feet RA. The APP mode is the only mode that will allow both A/Ps to be engaged at the

same time.

APP Switch:

Push

Illuminates APP switch light.

Arms the AFDS for localizer and glideslope capture.

Annunciates VOR/LOC armed and G/S armed on the AFDS portion of the flight mode annunciator.

Enables engagement of both A/Ps.


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Mode Control Panel (MCP)Autopilot/Flight Director

Each A/P may be engaged separately in CMD (command) or CWS (control wheel steering). A/P

engagement in CMD or CWS is inhibited unless both of the following pilot-controlled conditions are

satisfied:

No force applied to the control wheel.

The STAB TRIM AUTOPILOT CUTOUT switch is positioned to NORMAL.

Only one A/P may be engaged at any given time unless the APP mode is engaged. Dual A/P

operation provides aircraft control from the approach through the landing flare and touchdown or

automatic go-around.

During single A/P operation, full automatic flare and touchdown capability are not available.

Automatic go-around capability is also not available.


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A/P ENGAGE Paddles:

Controls level of A/P engagement.

Three possible selections

CMD (command)

CWS (control wheel steering)

OFF


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A/P ENGAGE Paddles:

CMD

Engages respective A/P (A or B) and enables all command modes.

With one A/P engaged in CMD, selecting second A/P to CMD disengages the first A/P, unless APP

mode is engaged.

Enables CWS operation for possible use, and will engage in CWS if:

a pitch or roll mode is not selected

a pitch or roll mode is deselected

a pitch or roll mode is manually overridden with control column force

If CWS is engaged, CWS PITCH and/or CWS ROLL will be displayed on the A/P STATUS portion of

the flight mode annunciator. Because CWS is controlling pitch and/or roll, the pitch and/or roll

modes on the AFDS portion of the flight mode annunciator will be blank.


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A/P ENGAGE Paddles:

CWS

Engages respective A/P (A or B) in CWS pitch and roll modes.

CWS PITCH and CWS ROLL will be displayed on the A/P STATUS portion of the flight mode

annunciator. Because CWS is controlling pitch and roll, the pitch and roll modes on the AFDS

portion of the flight mode annunciator will be blank.

A/P pitch controlled by pilot applying control column pressure forward or aft. When elevator

pressure is released, aircraft will hold existing attitude.

A/P roll controlled by pilot applying control wheel pressure left or right. If aileron pressure is

released with a bank of 6 or less, A/P will roll wings level and hold existing heading.


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A/P ENGAGE Paddles:

OFF

Disengages A/Ps.


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The left F/D switch activates F/D bars (command bars) on Captains ADI. The right F/D switch

activates F/D bars (command bars) on First Officers ADI. F/D bars will be displayed on respective

ADI if pitch and/or roll modes are engaged. If pitch and/or roll modes are not engaged, the F/D bars

do not appear.

The F/Ds may be operated with or without the A/P and A/T. F/D command modes may also be used

with an A/P engaged in CWS.

F/D commands operate in the same modes as the A/P except:

The TO (takeoff) mode is a F/D mode only (i.e. the A/P cannot be used for takeoff).

Dual F/D guidance is available even during single engine operations.

The F/D retracts from view at approximately 50 feet RA on an ILS approach. Therefore, the F/Ds

do not have have the ability to indicate landing flare.


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F/D (Flight Director) Switches:

ON

Enables flight director bars to be displayed on respective ADI. Flight director bars will be

displayed if pitch and/or roll modes are engaged.

On the ground, when TO/GA switch is pushed, arms pitch and roll modes for engagement in

TO/GA and HDG SEL modes.

In flight with A/P ON and F/Ds OFF, positioning a F/D switch to ON engages respective F/D in

the modes currently being utilized by the A/Ps.

OFF

Flight director bars retract from respective ADI.


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Master (MA) Flight Director Indicators:

Normally, the A FCC drives the Captains F/D bars and the B FCC drives the First Officers F/D

bars. However, with both F/D switches ON, the logic for both pilots F/D modes are controlled by

the master FCC.

The master FCC is indicated by illumination of the respective master (MA) F/D indicator light (the

MCP panel pictured above indicates the A FCC is the master). The master FCC is determined as

follows:

With neither A/P currently engaged in CMD, the FCC for the first F/D selected ON is the

master FCC.

With one or both A/Ps currently engaged in CMD, the FCC for the first A/P selected to CMD is the

master FCC; regardless of which F/D switch is selected ON first.

Note: Once a master FCC has been determined, the same status modes will be displayed on both

the Captains and First Officers flight mode annunciators.


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Independent F/D operation is indicated by illumination of both master (MA) F/D indicator lights.

During independent F/D operation, the F/D modes are controlled directly from the respective FCC

(A or B) under certain conditions.

Independent F/D operationoccurs when neither A/P is engaged in CMD, both F/D switches are

selected ON, and one of the following mode conditions exists: The APP mode is engaged with LOC and G/S captured.

GA mode engaged (by pressing TO/GA buttons) below 400 ft. RA.

TO mode engaged (by pressing TO/GA buttons) below 400 ft. RA.

Note: It is the opening of the TR3 disconnect relay that actually signals independent F/D operation.

When the TR3disconnect relay opens, this isolates the two DC power sources to the FCCs. This

isolation will prevent a failure of one DC bus from possibly causing the other DC bus to fail in a way

which could result in erroneous flight director displays.

Thi l d th i f th MCP Th t ti ill di th


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The MA flight director light logic is summarized below

If a F/D switch is in the ON position, the illumination of the associated MA light indicates that the

respective FCC is the master, and therefore is controlling the both F/D modes.

If a F/D switch is in the ON position and the associated MA light is extinguished, the F/D modes for

the respective F/D are being controlled by the opposite FCC.

Looking at the MCP above, it can be determined that the A FCC is the master, and the B FCC is

not the master. The A FCC is controlling the F/D modes for both the Captains and First Officers

F/D. However, if the First Officers MA light was also illuminated in the picture above, this would

indicate independent F/D operation. As a result, the F/D modes would be controlled directly from

the respective FCC.

This concludes the review of the MCP. The next section will discuss the

Flight Mode Annunciator (FMA) and various other automatic flight topics. Click Nextto continue.


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Instrument Panels

Flight Mode Annunciators (FMA)


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The FMAs are comprised of 19 prismatic

annunciators that indicate the operating modes of

the AFDS, A/T and FMC N1 LIMIT. The prismatic

annunciators rotate 120 along their longitudinal axis

to indicate the current operating mode. The

following slides will briefly describe each mode.


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AFDS Pitch Modes:

V/S (armed)

V/S mode may be engaged by moving vertical speed

thumbwheel.

G/S (armed)The AFDS is armed for G/S capture.


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AFDS Pitch Modes:

V/S (engaged)

Pitch commands hold selected vertical speed.

G/S (engaged)

The AFDS follows the ILS glideslope.


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AFDS Pitch Modes:

ALT ACQ

Transition maneuver entered automatically from a

V/S, LVL CHG or VNAV climb or descent to selected

MCP altitude. Engages, but does not annunciate,

during a VNAV transition.

MCP SPD

Pitch commands maintain airspeed/MACH indicated

in IAS/MACH display.


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AFDS Pitch Modes:

ALT HLD

Pitch commands to hold either the MCP selected

altitude or the uncorrected barometric altitude at

which the ALT HLD switch was pressed (if not at MCP

altitude).


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AFDS Pitch Modes:

VNAV PTH

The AFDS maintains FMC altitude or descent path

with pitch commands.


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AFDS Pitch Modes:

VNAV SPD

The AFDS maintains the FMC speed displayed on the

airspeed cursor and/or the CDU CLIMB or DESCENT

pages.


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AFDS Pitch Modes:

TO/GA (for takeoff)

Engaged for takeoff by positioning both F/D switches

to ON and pressing either TO/GA switch. Both F/Ds

must be ON in order to engage TO/GA prior to

starting takeoff.

The AFDS commands pitch attitude in the following

order:

10 nose down until 60 knots IAS.

15 nose up after 60 knots IAS.

15 nose up after liftoff until a sufficient climb rate

is established. Then pitch is commanded to

maintain MCP speed plus 20 knots.


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AFDS Pitch Modes:

TO/GA (for go-around)

Engaged for go-around by pressing either TO/GA

switch under the following conditions:

Not in the takeoff mode.

In flight below 2,000 feet RA. Either F/D ON or OFF.

The F/Ds command 15 nose up pitch and roll to

hold the approach ground track at time of go-around

engagement. After establishing a programmed rate

of climb, pitch commands the maneuvering speed for

each flap setting based on maximum weight

calculations.

Note: In order to perform an automatic autopilot

go-around, both A/Ps must be in CMD prior to

pressing either TO/GA switch.


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AFDS Pitch Modes:

FLARE (armed)

During a dual channel ILS approach, FLARE is armed

after LOC and G/S capture and below 1,500 feet RA.

Once FLARE is armed, the second A/P couples with

the flight controls and A/P go-around mode arms (butis not annunciated on the FMA).


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AFDS Pitch Modes:

FLARE (engaged)

During a dual channel ILS approach, FLARE engages

at 50 feet RA. FLARE accomplishes the autoland

flare maneuver.


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AFDS Roll Modes:

HDG SEL

The aircraft is turning to or is on the heading

selected in the MCP HEADING display.

VOR LOC (armed)AFDS is armed to capture selected VOR or LOC

COURSE.


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AFDS Roll Modes:

LNAV

The AFDS intercepts and tracks the active FMC route.

Either of the following capture criteria must be met in

order for LNAV to capture:

On any aircraft heading and within 3 NM of theactive route segment.

If outside of 3 NM of the active route segment, the

aircraft must be on an intercept heading of 90 or

less and intercept the route segment before the

active waypoint.

VOR LOC (engaged)

AFDS tracks selected VOR course or tracks selectedlocalizer course along the inbound front course

bearing.


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A/P STATUS modes:

CWS ROLL

Indicates roll axis is CWS mode.

CWS PITCH

Indicates pitch axis is CWS mode.


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A/P STATUS modes:

SINGLE CH

Annunciated when localizer is captured during single

A/P operation while in the APP mode.

A/P OFFIndicates that neither A/P is engaged and at least one

F/D is positioned to ON.


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A/T Modes:

FMC SPD

The A/T maintains speed commanded by the FMC.

MCP SPD

The A/T maintains speed set in the MCP IAS/MACHdisplay.

ARM

No A/T mode engaged. The A/T servo motors are

inhibited. The pilots may set thrust levers manually.

THR HLD

The A/T servo motors are inhibited. The pilots mayset thrust levers manually.


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A/T Modes:

N1

The A/T maintains thrust at the selected N1 limit

displayed on the thrust mode display.

RETARDDisplayed while A/T repositions thrust levers to the

aft stop. RETARD mode is then followed by ARM

mode.

A/T LIMIT

Indicates degraded A/T operation due to loss of FMC

or N1 signals.

GA

The A/T maintains thrust at reduced go-around N1

setting if TO/GA switch pressed once, or full go-

around N1 limit if TO/GA switch pressed a second

time.


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FMC N1 LIMIT:

CRZ

N1 cursors indicate max cruise N1.

CLB

N1 cursors indicate selected climb N1.

REDUCED

N1 cursors indicate max takeoff N1 (CDU displays the

reduced N1) or selected climb N1.

TO

N1 cursors indicate max takeoff N1.


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FMC N1 LIMIT:

CON

N1 cursors indicate max continuous N1.

GA

N1 cursors indicate max go-around N1.


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Autopilot/Autothrottle IndicatorsA/P P/RST (A/P Push To Reset) Disengage Light:

Illuminated flashing red

A/P has disengaged (warning tone sounds).

Lights reset by pushing either A/P P/RST disengage

light or pushing either A/P disengage switch.

Illuminated steady red Stabilizer out of trim below 800 feet RA during a

dual channel approach.

ALT ACQ mode inhibited during A/P go-around if

stabilizer not trimmed for single A/P operation.

Automatic ground system tests fail.

Disengage light test switch held in No. 2 position.

Illuminated flashing amber A/P has automatically reverted to CWS pitch or roll

while A/P switch(es) in CMD.

Lights reset by pushing either A/P P/RST disengage

light or engaging another mode.

Illuminated steady amber



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Autopilot/Autothrottle IndicatorsA/T P/RST (A/T Push To Reset) Disengage Light:

Illuminated flashing red

A/T has disengaged.

Illuminated steady red


Illuminated flashing amber

Indicates A/T speed error if speed not held to

within + 10 or5 knots of commanded speed when

all of the following conditions exist:

A/T engaged in MCP SPD or FMC SPD mode

In flight

Trailing edge flaps not up

Illuminated steady amber



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Autopilot/Autothrottle IndicatorsDisengage Light Test Switch:

(spring-loaded to center)

TEST position No. 1

Illuminates A/P P/RST and A/T P/RST disengage

lights steady amber.

Illuminates FMC P/RST alert light steady amber.

TEST position No. 2

Illuminates A/P P/RST and A/T P/RST disengage

lights steady red.

Illuminates FMC P/RST alert light steady amber.


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Captains control wheel

(autopilot disengage switch circled)

Autopilot/Autothrottle ControlsAutopilot Disengage Switches:

One located on each control wheel.

Push

Manually disengages both A/Ps.

A/P disengage lights flash.

A/P disengage warning tone sounds for a minimumof two seconds.

If the autopilot(s) disconnected automatically, one

push of a disengage switch will extinguish the

A/P disengage lights and silence the A/P disengage

warning tone.

Note: If the A/P was manually disengaged, the

second push of a disengage switch will extinguishthe A/P disengage lights and silence the A/P

disengage warning tone.

Listen to the A/P

disengage warning tone


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PT. METRO BATAVIA


Forward thrust levers

(autothrottle disengage switch circled)

Autopilot/Autothrottle ControlsAutothrottle Disengage Switches:

One located on each thrust lever.

Push

Manually disengages A/T.

A/T disengage lights flash.

A/T ARM switch trips to OFF. If the autothrottle disconnected automatically, one

push of a disengage switch will extinguish the A/T

disengage lights.

Note: If the A/T was manually disengaged, the

second push of a disengage switch will extinguish

the A/T disengage lights.


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Forward thrust levers

(TO/GA switch circled)

Autopilot/Autothrottle ControlsTO/GA (Takeoff/Go-Around) Switches:

One located on each thrust lever.

Push

Engages AFDS and A/T in TO or GA mode if the A/T

was previously armed.

See picture of

TO/GA switches as

viewed from above
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Instrument Panels

Stabilizer Out Of Trim


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Stabilizer Out Of Trim

STAB OUT OF TRIM Light:

Illuminated

A/P not trimming stabilizer properly.

Note: Light armed only when an A/P is engaged.


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Instrument Panels

Altitude Alert Lights


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Altitude Alert Lights

ALTITUDE ALERT Lights:Illuminated

Aircraft is approaching or departing MCP

selected altitude.

Listen to the

ALTITUDE ALERT tone

automatic flight r 01

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