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56 − EffectivePages

1 * Apr 10/2011

56 − Contents 1 Jun 10/20072 Jun 10/20073 Jun 10/2007

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CSTRUCTURAL REPAIR MANUAL

WINDOWSLIST OF EFFECTIVE PAGES

ChapterSectionSubject Config Page Date

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MasterEFFECTIVITY: ALL 56−Effective

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WINDOWS — GENERAL 1 ALL

General

Classification of Structure

Stations

Damage Definitions

Optical Area Definitions 2

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FLIGHT COMPARTMENT AND PASSENGER

COMPARTMENT WINDOWS − REPAIRS

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General

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FLIGHT COMPARTMENT WINDOWS − GENERAL 1 ALL

General

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WINDSHIELD AND SIDE WINDOW FRAMES, CENTER

POST, AND STRAPS − GENERAL

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General

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WINDSHIELDS − GENERAL 1 ALL

General

Structural Identification

WINDSHIELDS − REPAIRS 201 ALL

General


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WINDSHIELDS − ALLOWABLE DAMAGE 101 ALL

General

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SIDE WINDOWS—ALLOWABLE DAMAGE 101 ALL

General

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LOOSE WINDSHIELD POWER TERMINAL BLOCK −

REPAIRS

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General

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WINDSHIELD DISCONNECTED POWER TERMINAL

BLOCK − REPAIRS

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SIDE WINDOWS − GENERAL 1 ALL

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SIDE WINDOWS − ALLOWABLE DAMAGE 101 ALL

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PASSENGER COMPARTMENT WINDOWS − GENERAL 1 ALL

General



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PASSENGER COMPARTMENT WINDOWS −

ALLOWABLE DAMAGE

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PASSENGER COMPARTMENT WINDOWS − REPAIRS 201 ALL

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Jun 10/2007

WINDOWS — GENERAL

1. General

This chapter gives information/data on the structural material and the allowable damage for the flightcompartment windows, which are the windshields and side windows, and the passenger compartmentwindows.

2. Classification of Structure

Windows are classified as primary structure.

3. Stations

For the location of the windows refer to SRM 53–00–00.

4. Damage Definitions

The Windows and their seals should be periodically inspected for defects and erosion. A window mustbe replaced when it has greater damage than the maximum limits defined in PPG Industries Inc. CMM.The definitions of window defects used in this chapter are as follows:

A. Chip

A small piece that breaks away from the primary material. The area that stays looks like aclamshell.

B. Crack

A narrow split caused by a break in the material. A crack has a high depth−to−width ratio.

C. Crazing

Small breaks or splits in the surface that can only be found visually.

D. Edge and Hole Crazing

Crazing at mainply (i.e. outer, core, or inner ply) edges and/or holes can cause local laminarseparations which look like small mainply delaminations.

E. Delamination and Interlayer Bubbles

Separation of the mainply from the interlayer. Delamination and interlayer bubbles make shinyreflections.

F. Discoloration

Black or brown discoloration along the electrical bus bars, lead wires, or heating films.

G. Distortion

Changed proportions between the actual size of an object and its visual image when you see itthrough defects in the window.

H. Gouge

A continuous sharp or smooth channel−like groove with a cross−sectional area that changes.

I. Hazing

A cloudy or dull appearance on the surface of, or internal to the mainply panel.

J. Deep Scratch

A deep scratch is found when you rub the surface with your fingertip. A deep scratch is a sharpgroove more than 0.004 in (0.10 mm) deep with a build−up of material on the two sides of thegroove

K. Minor Scratch

A minor scratch is found with the fingernail but cannot be felt with the fingertip. Minor scratchesdo not have a build−up of material on one of the two sides of the groove, and are between 0.001and 0.004 in (0.03 and 0.10 mm) deep.


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L. Hairline Scratch

A hairline scratch is found when you rub a fingernail across a surface. A hairline scratch is lessthan 0.001 in (0.02 mm) deep.

M. Interlayer Split

When there is an interlayer split the polyvinyl butyral (PVB) interlayer moves apart in a planenormal to the transparent laminae.

5. Optical Area Definitions

The visual areas in a window are given as critical, semi−critical, and non−critical as follows:

A. Non−Critical

The outer area which extends 1.00 in (25.4 mm) in from the edge of the visual area. This includesthe sensing elements and terminal areas.

B. Semi−Critical

The area which extends 1.00 in (25.4 mm) in from the non−critical area. This includes the sensingelements and terminal areas.

C. Critical Area

The critical area is all of the visual area except the 2.00 in (50.8 mm) outer area specified asNon−Critical and Semi−Critical.



Feb 18/2003

FLIGHT COMPARTMENT AND PASSENGER COMPARTMENT WINDOWS − REPAIRS

1. General

This section gives information to repair damage to windshields, side windows and passengercompartment windows. The windows and their seals should be periodically inspected for defects anderosion. A window must be replaced when it has greater damage than the maximum limits defined inPPG Industries Inc. CMM. The windows can be repaired when they are installed or removed from theaircraft.

For Flight Compartment Windows − Repairs, refer to PPG Industries Inc. CMM.

For Passenger Compartment Windows − Repairs, refer to PPG Industries Inc. CMM.



Feb 18/2003

FLIGHT COMPARTMENT WINDOWS − GENERAL

1. General

This section gives general information on the flight compartment windows, which consist of twowindshields and two side windows. The flight compartment windows let the crew see out of the flightcompartment, thus visual clarity is critical. Refer to Figure 1 for the breakdown of the flightcompartment window.

For Windshields, refer to SRM 56−11−00.

For Side Windows, refer to SRM 56−12−00.



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Breakdown Of The Flight Compartment WindowsFigure 1


Feb 18/2003

WINDSHIELD AND SIDE WINDOW FRAMES, CENTER POST, AND STRAPS −GENERAL

1. General

For information on the cleaning/polishing of the windshield and side window frames, straps, and centerpost, refer to PPG Industries Inc. CMM.

For Windshields surround structure, refer to SRM 56−11−00.

For Side Windows surround structure, refer to SRM 56−12−00.



Feb 18/2003

WINDSHIELDS − GENERAL

1. General

This section gives information on the structural identification, allowable damage limits and repair for thewindshields.

There is a right windshield and a left windshield. Each windshield is located at the front of the flightcompartment on either side of the aircraft center line.

2. Structural Identification

The windshield is a fail−safe assembly that includes the following major parts:

– one outboard retainer

one Herculite II glass outer ply

one Herculite II glass core ply

one Herculite II glass inboard ply

one Urethane interlayer, and two PVB interlayers

one inboard retainer

five fillers

four structural straps

one fiberglass Z−strap.

Refer to Figure 1 for the windshield cross−section.

For the surround structure of the windshields, refer to SRM 53−11−35.



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OUTBOARDRETAINER

FILLERS

FIBERGLASSZ−STRAP

OUTBOARD PLY

INTERLAYER

INBOARDRETAINER

STRUCTURALSTRAPS

INBOARD PLY

INTERLAYER

CORE PLY

INTERLAYER


Windshield Cross SectionFigure 1


Feb 18/2003

WINDSHIELDS − REPAIRS

1. General

The windshields and their seals should be periodically inspected for defects and erosion.

A windshield must be replaced when it has greater damage than the maximum limits defined in PPGIndustries Inc. CMM. Refer to PPG Industries Inc. CMM for more details.

For Outer Z−Strap, Outboard Moisture Seal, and I−Strap Gasket − Repairs, refer to PPG IndustriesInc. CMM.



Feb 18/2003

WINDSHIELDS − ALLOWABLE DAMAGE

CAUTION: MAKE SURE THAT THE CHECK AND REPAIR DATA IN THE REVISION OF THEABBREVIATED CMM HAS BEEN APPROVED BY BOMBARDIER DAD AND/ORTRANSPORT CANADA.

1. General

For Windshields − Allowable Damage, refer to PPG Abbreviated CMM 56−11−01.



Jun 22/2004

SIDE WINDOWS—ALLOWABLE DAMAGE


1. General

For Side Windows− Allowable Damage, refer to PPG Abbreviated CMM 56−11−02.



Jun 22/2004

LOOSE WINDSHIELD POWER TERMINAL BLOCK − REPAIRS

1. General

The left and right windshield power terminal blocks can become loose during service.

For Loose Windshield Power Terminal Block − Repairs, refer to PPG Industries Inc. CMM.



Feb 18/2003

WINDSHIELD DISCONNECTED POWER TERMINAL BLOCK − REPAIRS

1. General

The left and right windshield power terminal blocks may become disconnected during service.

For Windshield Dislodged Power Terminal Block − Repairs, refer to PPG Industries Inc. CMM.



Feb 18/2003

SIDE WINDOWS − GENERAL

1. General

This section gives information on the structural identification, allowable damage limits and repair for theflight compartment side windows. There is a left side window and a right side window immediately aft ofthe left and right windshields. Each side window is a bonded assembly.


The side window is a fail−safe assembly that includes the following major parts:

– one outboard retainer

one Herculite II glass outer ply

one Herculite II glass core ply

one Herculite II glass inboard ply

one Urethane interlayer, and two PVB interlayers

one inboard retainer

five fillers

four structural straps

one fiberglass Z−strap.

Refer to Figure 1 for side window ply identification.

For the surround structure of the windshields, refer to SRM 53−11−35.



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OUTBOARDRETAINER

FILLERS

FIBERGLASSZ−STRAP

OUTER PLY

URETHANE

INBOARDRETAINER

STRUCTURALSTRAPS

GLASS

PVBGLASS

PVB

GLASS

INTERLAYER

INTERLAYERINBOARD PLY

INTERLAYERCORE PLY


Side Window Cross SectionFigure 1


Feb 18/2003

SIDE WINDOWS − ALLOWABLE DAMAGE

1. General

For Side Windows − Allowable Damage, refer to PPG Industries Inc. CMM.



Feb 18/2003

SIDE WINDOWS − REPAIRS

1. General

The side windows and their seals should be periodically inspected for defects.

A side window must be replaced when it has greater damage than the maximum limits defined in PPGIndustries Inc. CMM. Refer to PPG Industries Inc. CMM for more details.

For Outer Z−Strap, Outboard Moisture Seal, and I−Strap Gasket−Repair, refer to PPG Industries Inc.CMM.



Feb 18/2003

PASSENGER COMPARTMENT WINDOWS − GENERAL

1. General

This section gives information on the structural identification, allowable damage limits and repair for thepassenger compartment windows.


There are 12 passenger compartment windows on the left side of the fuselage and 11 on the right side.There is also one passenger compartment window installed in each of the two overwing emergencyexits. Refer to Figure 1 for the structural identification of the passenger compartment windows.



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Passenger Compartment Window − Structural IdentificationFigure 1


Feb 18/2003

ITEM DESCRIPTION DRAWING MATERIAL REFERENCEFINISHCODE

♦EFFECTIVITY

Window Installation 600−31055

1 Outer Ply † 601R31056

2 Inner Ply † 601R31056

3 Seal − E Type † 601R31056 Silicone Rubber

4 Bush Assembly † 601R31056

5 Retainer Assy 600−31162 0.050 (1.27) 2024 Al alloy ‡

6 Retainer Assy †† 600−31162 0.050 (1.27) 2024 Al alloy A023

♦ Refer to SRM 51−21−16.

† Sierracin Sylmar.

†† Emergency exit window.

‡ Per spec QQ−A−250/5T3.

NOTE: All dimensions are given in inches followed by millimeters in parentheses.


Key to Figure 1


Feb 18/2003

PASSENGER COMPARTMENT WINDOWS − ALLOWABLE DAMAGE


1. General

For Passenger Compartment Windows − Allowable Damage, refer to SIERRACIN/SYLMAR CMM56−20−00.



Jun 22/2004

PASSENGER COMPARTMENT WINDOWS − REPAIRS

1. General

The passenger compartment windows should be periodically inspected for defects. A passengercompartment window must be replaced when it has greater damage than the maximum limits definedin Sierracin Sylmar CMM.

For Passenger Compartment Windows − Repairs, refer to Sierracin Sylmar CMM.



Feb 18/2003

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