flight data monitoring analysis specificationonly assessed down to 50ft ra, the condition at 50ft ra...
TRANSCRIPT
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Flight Data Monitoring
Analysis Specification
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Behind the
Specifications
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Templates
Fleets
Events
Thresholds
Patches
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Understanding KTIs
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Understanding KTIs
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Understanding KPVs
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Your Specification
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Your own Specification
Recommendations
Add, Remove, Amend
Designated analyst
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Method 1
Trend up to the limit
Number of Level 3
events triggering
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Method 2
Level of exceedance
No trending
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Method 3
My recommendation
Trending, SOPs,
Exceedance
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Maintenance
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Histograms
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Approval and Release
Permissions
Designated analyst
Senior Analyst
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Scenario: New Event
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Scenario: New Event
Identify a need
FDS Safety Manager
Prioritise
Development
Testing
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Scenario: New Event
Tailstrike risk
Derotation Slow
Pitch Rate High Touchdown to 60kts
Pitch High Touchdown to 60kts
Notification, Monthly Reports, Designated Analyst
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Scenario: New Event
Draft specification
Template Inheritance
Analyst recommendations
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Scenario: New Event
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Operational Invalidity
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Patches
Why so many events?
Is my operation very bad?
Why JFK?
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Taxi Events
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Taxi Events
Patch?
Designated analyst
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Taxi Events
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Understanding Your
Events
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Understanding your events: Unstable Approach
https://github.com/FlightDataServices/FlightDataAnalyzer
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Understanding your events: Unstable Approach
https://github.com/FlightDataServices/FlightDataAnalyzer
1. Gear is down
2. Landing flap is set
3. Track is aligned to the runway (within 12 degrees, or 30 degrees if offset
approach)
4. Airspeed:
Airspeed minus selected approach speed within -5 to +15 knots (for 3 secs)
OR Vapp within -5 to +10 knots (for 3 secs)
OR Vref within -5 to +35 knots (for 3 secs)
5. Glideslope deviation within 1 dot
6. Localiser deviation within 1 dot
7. Vertical velocity between -1100 and -200 fpm
8. Engine thrust greater than 40% N1 or 35% N1 (A319, B787) or 1.09 EPR (for 10 secs)
or 1.02 EPR (A319, A320, A321)
9. If all the above conditions are met, the approach is “Stable”
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Understanding your events: Unstable Approach
https://github.com/FlightDataServices/FlightDataAnalyzer
1- Is the Gear down?
If yes move to step 2
2- Is the landing flap set?
If yes move to step 3
3- Is the track aligned with runway heading?
(Within 12 degrees, or within 30 degrees if localiser is
marked as “offset” in the Airport Database)
If yes move to step 4
4- Is airspeed stable?
(Only assessed down to 50ft RA, the condition at 50ft RA
is assumed to continue to landing)
Airspeed minus Airspeed Selected (-5kts to +15kts) for 3
seconds
-OR Airspeed minus VApp (-5kts to +10kts) for 3 seconds
-OR Airspeed minus Vref (-5kts to +35kts) for 3 seconds
-OR Airspeed minus VLS (-5kts to +35kts) for 3 seconds
If yes move to step 5
5- Is the aircraft within 1 dot of the glideslope?
(Only assessed down to 200ft AAL, the condition at 200ft
AAL is assumed to continue to landing)
If yes move to step 6
6- Is the aircraft within 1 dot of the localiser?
(Only assessed down to 200ft AAL, the condition at 200ft
AAL is assumed to continue to landing)
If yes move to step 7
7-Is the vertical velocity stable?
(Between -200fpm and -1100fpm) (Only assessed down to
50ft RA, the condition at 50ft RA is assumed to continue to
landing)
If yes move to step 8
8- Is the engine thrust stable?
(Only assessed down to 50ft RA, the condition at 50ft RA
is assumed to continue to landing)
IF engine records EPR:
IF in aircraft family A319, A320, A321 EPR is stable above
1.02
ELSE EPR is stable above 1.09
(if no EPR) ELSE
IF in aircraft family A319, B787 N1 is stable above 35%
ELSE N1 is stable above 40%
If yes, move to step 9
9- Are all criteria met?
If "Yes" define approach as "STABLE"
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Airspeed 50ft RA
Glideslope 200ft AAL
Localiser 200ft AAL
Vertical velocity 50ft RA
Engine thrust 50ft RA
https://github.com/FlightDataServices/FlightDataAnalyzer
Understanding your events: Unstable Approach
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Understanding your events: Unstable Approach
https://github.com/FlightDataServices/FlightDataAnalyzer
Interactive Statistics- Eventful Flights
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Understanding your events: Derotation Slow
https://github.com/FlightDataServices/FlightDataAnalyzer
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Understanding your events: Derotation Slow
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Understanding your events: Derotation Slow
Touchdown KTI
Pitch at 60kts Airspeed
Time when Pitch equals Pitch at 60kts Airspeed + 2 degrees
Leads to…
Touchdown To Pitch 2 Degrees Above Pitch At 60kts Duration
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Questions