# BOMBARDIER MODIFICATION SUMMARY PACKAGE 1 CERTIFYING AUTHORITY NO. 2 MODELl TYPE 3 MODSUM NO. COMPLETE 

## D 4



### SHEE~ 

## Not Applicable

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### ..

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### Q400 15402400028 1 OF 5 CURRENT A 

# p I REVISION I 6 PRIME DESIGN ACTIVITY BOMBARDIER INC. 

## D 3AB48 7 SUPPLIER NAME AND CAGE CODE

BOMBARDIER INC., MONTREAL 

## D 88308 LEARJET INC. 

## D 2421o BOMBARDIER INC.. DOWNSVIEW 

### IX] 71867 SHORT BROTHERS PLC 

## D K4585 8 TITLE 10 APPROVED INITIATING DOCUMENT MLG Electrical Harnesses - 82440845 & 82440848 (LH Aft-Mid PCR 44059 Nacelle) and 82440841 & 82440850 (RH Aft-Mid Nacelle) Re-Routing 9 MAJOR ASSY OR COMPONENT AFFECTED 82454301 Electrical Harness Installation LH Aft-Mid Nacelle BASKET MODSUM 82454315 Electrical Harness Installation RH Aft-Mid Nacelle 

## D SEE INDIVIDUAL AUTH DOCUMENTS 11 DESCRIPTION OF MODIFICATION

This Modsum re-routes Electrical Harnesses 82440845 & 82440848 (LH Aft-Mid Nacelle) and 82440841 & 82440850 (RH Aft-Mid Nacelle) and installs grommets to prevent contact with the MLG Stabilizer Brace.

12 REASON FOR MODIFICATION

This Modsum provides retrofit 

### I additional protection to prevent possible contact with the MLG Stabilizer Brace.
13 ENGINEERING REMARKS

This Modsum is for in-service aircraft only and 

### will not be incorporated on production aircraft. I 

### ( i APPROVED BY: 

## /; j1 

# , \ I I DATE:20l2/06/22 APPROVED IN ACCORDANCE WITH TRANSPORT CANADA DAO NO. 93-Q-02 14 RELATED MODSUM 16 PRODUCTION EFFECTIVITY 

# ® IS4Q5450002, IS4Q5450003 N/A 

# I IS4Q2400029, 4Y123798

## psi.JG.:J..I/-OVO$0 

## :t

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## 4&. 3

## aooo(,2 15 ENGINEERING VALIDITY 17 RECOMMENDED SERVICE EFFECTIVITY

4001-4999 

# e<-. DHC-8, Series 400 18 CLASS " A>RW0R'"'"S5



## CiCA"~ In Service Aircraft SIN's 4001-4089 (Pre-4S126274) 

## B LEVEL 1 •• 

## D LEVEL 2. LEVEL BT0206-02A WiW REV 2004·1 0 ..DCCP OR •ACRL & SOC OR FAA FORM 8110·3 REQUIRED © 2004 Bombardier Inc.

# BOMBARDIER MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET AUTHORIZATION SHEET IS4Q2400028 

### 2 5 CURRENT REVISION 

### A 

## 'B ' 21 ORIGINATOR

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BT0206-Q6 MW REV 2004-1 0

# BOMBARDIER AIRWORTHINESS CLASSIFICATION H REV V AIRWORTHINESS CLASSIFICATION 

### A **LEVEL 1 *LEVEL 2 LEVEL3 

## V W DISCIPLINE CODE 

## -L X CERT AUTH llllrJil

DES REP SIGNATURE**II~** a ..

### IJ'" Y CERTAUTH DES REP NAME I"\

### A~ 

### INO H REV V AIRWORTHINESS CLASSIFICATION **LEVEL 1**~** --. *LEVEL 2 LEVEL 3 W DISCIPLINE CODE 

### E.L X CERT AUTH 

## 111\l I \

DES REP Sl GNATU RE I'll\ I.\ .A i\i.. Y CERTAUTH DES REP NAME**I~AICII'-'0** 

# v

H REV V AIRWORTHINESS CLASSIFICATION **LEVEL 1 *LEVEL 2 LEVEL 3 W DISCIPLINE CODE X CERTAUTH

DES REP SIGNATURE Y CERTAUTH DES REP NAME H REV V AIRWORTHINESS CLASSIFICATION **LEVEL 1 *LEVEL 2 LEVEL 3 W DISCIPLINE CODE X CERTAUTH

DES REP SIGNATURE Y CERT AUTH DES REP NAME H REV V AIRWORTHINESS CLASSIFICATION **LEVEL 1 *LEVEL 2 LEVEL 3 W DISCIPLINE CODE X CERT AUTH

DES REP SIGNATURE Y CERT AUTH DES REP NAME H REV V AIRWORTHINESS CLASSIFICATION **LEVEL 1 *LEVEL 2 LEVEL3 W DISCIPLINE CODE X CERTAUTH

DES REP SIGNATURE Y CERTAUTH DES REP NAME 

### MODIFICATION SUMMARY PACKAGE C MODSUMNO. D SHEET IS4Q2400028 

### 2.1 -/


# - S7 LDt:;./1 

# -· v v/

BT0206-07 MW REV 2004-10 AFTER TYPE APPROVAL,**DCCP OR *ACRL & SOC OR FAA FORM 8110-3 REQUIRED

# BOMBARDIER MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET CONTINUATION SHEET 

### IS4Q2400028 3 5 CURRENT A 

### B REVISION 

### Parts Reguired: Item QTY 

### Part No. Description No.

1 NR DSC230-7HT or Panduit T25T or AMP 500024 Spiral Wrap, Teflon (.250" 2 NR MS21266-2N Grommet, Edging 3 NR OHMS A6.09 Epoxy Adhesive or Fast Weld No. 10 Adhesive 4 NR OHMS A 6.12 or EC-2216 Epoxy Adhesive B/A, (3Ml Adhesive 5 NR OHMS S3.01/B2 or PR 1422 B1/2 Sealant 6 NR MIL-1-19166 Fiberglass Tape (1 to 1.5") 7 12* B0816035CR3T (Preferred) or {Click Bond) Cable Tie Mount, Metal CB3019CR3T (Preferred) or Alternate P/N CSP458-1 or B0816033-002 8 NR B0816019-003 or PLT2S-76 (Panduit) Tie Wrap/Strap 9 NR B0816038-002 or CR4H (Panduit) Connector Ring 10 2* NAS43DD3-32FC Spacer 11 2* NAS1801-3-16 Screw 12 4* MS21919WDE12 Clamp 13 4* MS21919WDE10 Clamp 14 4* NAS1801-3-20 Screw 15 2* B0204046CRA3-20 or CB3001 CRA3-20 (Click Bond) Stand Off (Click Bond) 16 NR CB200 or CB200-40 Acrylic Structural Adhesive Adhesive (Click Bond) 17 2* NAS1801-3-1 0 .Screw 18 2* NAS43DD3-40FC Spacer Notes: * Minimum Qty needed, any excess may be used as spares. 

### Job Set-U!;!: 

### • Obey all the Electrical/Electronic Safety Precautions (Refer to TASK 24-00-00-910-801 ) . 

## • Obey all the electrostatic discharge safety precautions (Refer toT ASK 24-00-00-91 0-802). 

### • De-energize the electrical system (Refer to TASK 24-00-00-861-802). 

### • Open and tag the circuit breakers for the affected circuits . 

### • Open and lock the main landing gear doors (Refer to TASK 32-00-00-840-801 ) . 

### Warning: 

## • Remove all Electrical & 

### Hydraulic power from the aircraft before you do maintenance. 

### • • Jack the Aircraft lAW AMM TASK 07-10-00-582-801 . 

### • Remove LH & RH MLG Stabilizer Strut lAW AMM TASK 32-11-16-000-801 . 

### • Remove LH & RH MLG Forward Doors lAW AMM TASK 32-12-11-000-801 .

BT0206-05 MW REV 2004-10

# BOMBARDIER MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET CONTINUATION SHEET 5 CURRENT REVISION

References: A IS4Q2400028 

### B

• IPC Fig 24-00-03-01 -Electrical Cable Installation- Outboard, LH Mid & Aft Nacelle. • IPC Fig 24-00-03-10- Electrical Cable Installation- Outboard, RH Mid & Aft Nacelle. • AMM TASK 20-50-53-000-802- Removal of the Fuselage to Wing Fairing Access Panels. • AMM TASK 20-50-53-400-802 - Installation of the Fuselage to Wing Fairing Access Panels. • AMM TASK 32-11-31-400-801 -Installation of the MLG Electrical Harness. • AMM TASK 20-30-03-910-801 -Cleaning of Electrical Connector, Switch or Relay. • AMM TASK 20-30-26-910-801- Cleaning of the Electrical Wiring. • AMM TASK 20-30-11-760-801 - Electrical Test of the Aircraft Wiring. • AMM TASK 32-61-06-830-801 -Rigging of the Proximity Sensors. • AMM TASK 32-46-00-720-802 - Functional Test of the Antiskid System. • AMM TASK 32-31-00-710-801- Operational Test of the Landing Gear Primary Extension and Retraction System. • WDM 20-12-10-201 -Wiring- Maintenance Practices. 4

• WDM 20-15-04-201 - Repair of the Metal Overbraiding Shield on Electrical Cable Harnesses Within Allowable Damage Tolerances. • WDM 20-15-10-401 -Adaptors And Connectors Used To Terminate Overbraid And Individual Wire Shields For Emi And HIRF Protection- Removal/Installation. • WDM 20-17-10-201 -Electrical Connectors- Maintenance Practices. • WDM 20-17-01-201 -Procedures for Disconnection and Connection of Electrical Connector(s) For Return To Service Of The Aircraft. • WDM 32-46-00 - Anti-Skid System • WDM 32-61-00- Proximity Sensor System (LH Aft-Mid Nacelle): • Harness 82440845: To 3261-J21 (LH WOW-1) & 3261-J23 (LH Gear Down Lock-1) • Harness 82440848: To 3261-J22 (LH WOW-2) & 3261-J24 (LH Gear Down Lock-2) (RH Aft-Mid Nacelle): • Harness 82440841: To 3261-J41 (RH WOW-1) & 3261-J43 (RH Gear Down Lock-1) • Harness 82440850: To 3261-J42 (RH WOW-2) & 3261-J44 (RH Gear Down Lock-2)

BT0206·05 MW REV 2004-10

# BOMBARDIER MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET CONTINUATION SHEET 154Q2400028 5 5 CURRENT REVISION 

### A 8 

# I Procedure:

1. Gain access to the 

### LH Nacelle area and clean the Electrical Conduit 

### I Harnesses 82440845 & 

### 82440848 going to connector's 3261-J21, 3261-J23, 3261-J22, and 3261-J24 with Isopropyl Alcohol. (Refer to TASK 20-30-26-910-801 & 

### TASK 20-30-26-910-803- Cleaning of the Electrical Wiring). See 

### Figure 1 for noted location. Disconnect connectors 3261-P21, 3261-P23, 3261-P22, and 3261- P24 and clean both the 

### P & 

### J side of these connectors lAW AMM TASK 20-30-03-91 0-801. 

# \

Figure 1- LH Nacelle, Location Of The Harnesses To Be Re-Routed

BT0206.()5 MW REV 2004-10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO . 4 SHEET IS4Q2400028 6


### 2 . Inspect the Harness Conduit for any signs of chafing or damage and if required repair lAW WDM 20- 15-04-201. See 

### Figure 2. If damage is found on Harness Conduit due to impact damage, inspect the applicable MLG Stabilizer Brace . Inspect the adjacent area around the conduits for any signs of structural damage due to chafing . Report any Stabilizer Brace or structural damage findings to Bombardier Aerospace via the THO .



### Figure 2 - LH Nacelle, Area Of Inspection
BT0206-05 MW REV 2004-1 0 Inspect These Cables & The Adjacent Structure For Signs Of Chafing

Note: The Routing May Vary Between AJC

# BOMBARDIER CONTINUATION SHEET 5 CURRE NT REVISION 

### A B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET 15402400028 7
3. Remove the harness support clamps mounted on the Nacelle "A" frame and pull the harness down . Loosen the harness support clamps along the Nacelle s ide panel as shown. Cut and remove any tie wraps , tape , or spiral wrap . Inspect the removed hardware for condition and replace as required . See 

### Figure 3.

I I

Loosen These Support Clamps I 

# I ' ' 

# I 

# I

LH Nacelle- View Looking Out Board , LH Side Panel Remove These Support Clamps & Pull Cables Down LH Nacelle- View FWD On Aft Face Of 'A' Frame 

### Figure 3 - LH Nacelle, Support Clamps Removal 4 . Prepare/clean the area shown in 

### Figure 4 where the metal tie mounts (Item 7) , standoff (Item 15) & grommet (Item 2) a re to be installed by clean i ng with solvent (Isopropyl Alcohol) or equivalent. BT0206.{)5 MW REV 2004-10

# BOMBARDIER MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET CONTINUATION SHEET 5 CURRENT REVIS ION 

### A B**IE ~**  

### LKG F WD ON 'A' FRAME IL/H**~** 9-N RIH S I MILAR! View Looking FWD On Aft Face Of 'A' Frame, LH Nacelle Shown, RH Nacelle Similar, P/N 8Z8527 Shown , Or P/N 85414025 15402400028

LH Nacelle- View Looking Out Board, LH Side Panel 

### Figure 4 - LH Nacelle, Tie Mount & Grommet Installation Preparation 5. Install the Click Bond Standoff (Item 15) and Tie Mounts (Item 7) using the dimensions & locations shown in 

### Figures 6 & 

### 7. Go to step 7 for alternate Tie Mounts (P/N CSP458-1) installation . 8



### 6. Mark locations and prepare the area for bonding. 

### Surface preparation: Surface preparation is an important part of adhesive bonding . Lightly abrade glossy surfaces to improve the adhesive bond . Just prior to adhesive application , clean surfaces with solvent using clean rags or paper towels. Do not use shop towels , rags or paper wipes contaminated with oil, soap, or reclaimed solvents . Wash one small area at a time , and then dry with a clean cloth before the solvent evaporates to prevent redeposition of contaminants . To maintain a clean solvent supply, always pour the solvent on the BT0206.()5 MW REV 2004-10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO . 4 SHEET 15402400028 9 

### washing cloth . Click Bond C8200 Notes: Mix Ratio (B : A) : 8 : 1 (volume) , 7 : 1 (weight) , Working time at 75°F : 5 minutes (small quantities) . Cure time at 75° F: 30 minutes- handling strength . 2 hours90% of ultimate strength . 24 hours -full cure . Mixing 

### & Applying C8200 or CB200-40 Adhesive: Dispense 

### 8 parts of component B and one part of component A (by volume) . Mix until a uniform color is obtained (or use a disposable mixing nozzle) . Apply to one of the surfaces to be bonded . To assure maximum bond strength, surfaces must be mated within 2 minutes. Use sufficient material to insure 100% joint fill when parts are mated . All adhesive application, part positioning, and clamping should occur before the 5 min . working time of the mix has expired . Movement of the parts after working time has expired can result in bond strengths lower than normal. Insure that the assembly remains undisturbed for 30 minutes to allow adhesive cure to progress to the handling strength stage where the fixtures or clamps may be removed . Possible Adhesive (Item 16)

CB200 - 3.5 Gram Foil Pack,

Enough Adhesive For 4-5 Click Bond Bases

2- Locate fixture on substrate using a template or by aligning index marks with drawn centerline. Press down on outer box to adhere foam tape to substrate. CB200-40 - 40 ml Dual Pack Syringe Cartridge, Used With CB100, CB81 & CB106

3- Apply pressure to inner box to

actuate fixture . Plastic springs extrude adhesive bond line and apply positive pressure during adhesive cure. 1- Remove the backing from foam pads on fixture and discard . Apply adhesive to fastener base.

4 - After adhesive has cured , remove fixture by grasping with pliers & discard. 

### Figure 5 - Click Bond 'Tie Mount' 

### & 'Standoff' Installation Procedure

BT0206-05 MW REV 2004-1 0

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A 

### B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET 15402400028 10

"' .. I'

## ~--**-----------~· ~~~~** **------------------- ~~--------~~~,·~-+~--------------------,**  

# r7**r\l~f-l** It



# --

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### I j 

### 5Jr**~-** 

# lP

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### 14.5 8.75" 6.5" L.. J 

# -

Tie Mount Item 7, Two Locations LH Nacelle Standoff, Item 15,

One Location Required For Pre-4Q1 09058 (4028) A/C Only, That Have 2 Transitions On Conduit P/N 82440845 Located In The LH Nacelle



# I Figure 6 - LH Nacelle , Tie Mount 

### & Standoff Installation 

# I BT0206.05 MW REV 2004- 10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVIS ION 

### Y2010 -18.000

REF A 8

Keep Cables Below This Reference Line, Aligned With Machined Flange 

### ••••••••••••••••••••••••••• 7.75. 1+-----

**6.50"----~** 

### 6.00"

**------~** 

### 3 .25"

Existing Machined Flanges On 'A' Frame P/N 8Z8527 Shown, Or P/N 85414025 Dimension Tolerances : (+/- .100") No Contact With Flanges Or OtherTie Downs 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO . 4 SHEET IS4Q2400028

This Fourth Tie Mount Is Only Required For Pre4Q109058(4028)AJC

Only, That Have 2 Transitions On Conduit P/N 82440845 Located In The LH Nacelle
Install Tie Mounts (Qty 3),

Item 7, With The Noted Dimensions & Orie ntation
Remove Any Existing Tie Mounts That Don't Meet The Noted Dimensions &

Orientation As Shown 11

View Looking FWD On Aft Face Of 'A' Frame, LH Nacelle Shown, RH Nacelle Similar 

### Figure 7 - LH Nacelle, Tie Mount Installation BT0206-05 MW REV 2004- 1 0

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A 

### B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET 15402400028 

### 12

7. As a alternate to the Click Bond Tie Mounts (P/N B0816035CR3T), it is acceptable to install tie mount (P/N CSP458-1) using the dimensions & locations shown in 

### Figures 6 

### & 7 with Fast-Weld #10 Epoxy Adhesive lAW SRM TASK 51 -22-35-02-01 or with EC - 2216 B/A Grey Adhesive lAW SRM TASK 51- 22-20-02-01 . Lightly abrade and then clean the contact area of both the tie mount & structure surface before applying adhesive as detailed in step 6 . After cure , seal the edges of the tie mount bases with PR 1422 81/2 lAW SRM TASK 51-23-00-00-01 . 8. Install the grommet (Item 2) in the location shown in 

### Figure 7 w ith Fast Weld No . 10 (Refer to SRM51-22-35) or with OHMS A6 .09 epoxy adhesive (Refer to SRM51-22-45) . 9. The following re-routing procedure is for 

### Pre-4Q1 09058 (4028) A/C only, that have 2 transitions on Conduit P/N 82440845 located in the LH 

### Nacelle. Re-route 82440845 & 82440848 cable harnesses as shown in 

### Figures 8 

### & 9 using the new standoff and 6 tie wrap mounts . Cable Assy 82440848, With Smaller Transition. This Transition Moves

To Nacelle Sidewall

Note: The Routing May Vary Between AIC Move 82440848 Transition To Side Wall. Secure Transition As Shown

With Item 13 (Clamp) & Item 17 (Screw) To Item 15 (Standoff). Orient Clamp Up Or Down To Provide Best Clearance.

Secure Cable As Show To New Tie Mount With Item 8 (Tie Wrap)

Secure 82440845 Transition To Existing StandoffWith Item 12 (Clamp); Item 11 (Screw) & Item 10 (Spacer) As Shown Route 82440848 Cables Under 82440845 Transition & Secure To New Tie Wrap Mounts Using Item 8 (Tie Wraps) As Shown

Keep Cables Below This Reference Line, Aligned With Machined Flange 

# I Re-Route & Secure The Cables As Shown 

# I Figure 8- LH Nacelle, Harness Cable Re-Routing For Pre-4Q109058 

### AJC (Pre-4028) BT0206.Q5 MW REV 2004-1 0

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVIS ION

326t -J23 A B Adjust Cable Spacing/Separation With Item 9 (CR4H) &

Item 8 (Tie Wraps)

Secure Cable As Shown To New Tie MountWith Item 8 (Tie Wrap) Adjust Backshell Clamp Angle FWD

As Required To Provide Clearance Cover Cables With Protective (Sp i ral Wrap , Item 1) As Requ i red 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 15402400028

Note : Actual Cable Routing Will Vary Due

To Cable Length Variations

Note : IS4Q5450002 - Reverse

Installation Of Specified Fasteners, Completed 4 SHEET 13



### Figure 9- LH Nacelle, Harness Cable Re-Routing For Pre-4Q109058 

### AJC (Pre-4028} B T0206-05 MW REV 2004-1 0

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUMNO. 4 SHEET 15402400028 14


### 10. The following re-routing procedure is for 

### Post-4Q109058 A/C (4028-4089), that have 1 transition on Conduit P/N 82440845 located in the LH Nacelle . Re-route 

### & re-secure 

### 82440845 & 82440848 cable harnesses as shown in 

### Figures 10, 11, 12 using the 

### 5 new tie wrap mounts .

Note: The Routing May Vary Between A/C Cables Are Moved Below This Reference Line, Aligned With Mach ined Flange This Transition Is Moved Back, Which Pulls Cable

Away From Machined Flange



### Figure 10 - LH Nacelle, Harness Cable Re-Routing For Post-4Q1 09058 A/C (4028-4089) BT0206.{)5 MW REV 2004-1 0

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVIS ION 

### A B 

### MODIFICATION SUMMARY PACKAGE 3 MODS UM NO. 4 SHE ET 154Q2400028 15
Carefully Tie Wrap Cables with (Item 8) To The Tie Mounts (Item 7), 3 Locations . Don 't Tighten Tie Wraps Too Much As This Can Crush The Inner Conduit. Install Clamp (Item 13) On Transition , Reposition Existing Clamps As Shown , With Spacer (Item 18) &

Screw (Item 14)

**3261~23**

Keep Cables Below This Reference Line, Aligned With Machined Flange Secure Cable As Shown To New Tie Mount With Item 8 (Tie Wrap) Cover Adjacent

Wiring With Spiral Wrap If

Required . Secure Cables Here To New Tie MountWith Item 8 (Tie Wrap) Existing Clamp P /N DSC184-9



### Figure 11- LH Nacelle, Harness Cable Re-Routing For Post-4Q109058 A/C (4028-4089) BT0206-05 MW REV 2004-1 0

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVIS ION A 8

Re-Route & Secure The Cables As Shown

Adjust Backshell Clamp Angle FWD

As Required To Provide Clearance 

### 326t-J23 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO.

Adjust Cable Routing With Additional CR4' s & Tie Wraps If Required To Maintain Clearances 15402400028

Cover Cables With Item 6 (Fiberglass Tape) & Item 8 (Tie 

# -------"Mill.. Wrap) As Required

Re-lock Connector Back Shells After Adjusting Angle, Shown Unlocked 4 SHEET 16



### Figure 12- LH Nacelle, Harness Cable Re-Routing For Post-40109058 A/C (4028-4089) 11 . If required , cover wires & cables with spiral wrap for additional protection lAW WDM 20-12-10-201- Wiring - Maintenance Practices. 12 . Re-tighten any support clamps that were moved or loosened . Add fiberglass tape and tie wraps where required to provide clearance and security. Ensure to re-lock any connector back shells that may have been adjusted . 13. Remove wing root access panels 261 BT (Fwd) 

### & 262NL (Aft). To verify the MLG harness integrity, carry out a continuity and isolation test lAW AMM TASK 20-30-11-760-801 . Check between connectors 9811-P751 to 3261-J22 , 3261-J24 and 9811-P459 to 3261-J21, 3261-J23 (Ref. WDM 32- 61-00 

### & WDM 32-46-00) . After completing the continuity and isolation test, ensure the connectors are cleaned, dried, and then apply a corrosion inhibitor (CPC) to the connectors lAW AMM TASK 20-30- 03-910-801 . Re-install the connectors. Install wing root access panels 261 BT (Fwd) & 262NL (Aft) . 14. Remove all tools , equipment and unwanted materials from the LH Nacelle work area.
BT0206.{)5 MW REV 2004-1 0

# BOMBARDIER MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET CONTINUATION SHEET 

### 15402400028 17 5 CURRENT REVISI ON 

### A B


# I15. Gain access to the 

### RH Nacelle area and clean the Electrical Conduit 

### I Harnesses 82440841 & 82440850 going to connector's 3261-J41 , 3261-J43, 3261-J42 , and 3261-J44 with Isopropyl Alcohol. (Refer to TASK 20-30-26-910-801 & TASK 20-30-26-910-803 - Cleaning of the Electrical Wiring) . See 

### Figure 13 for noted location . Disconnect connectors 3261-P41, 3261-P43, 3261-P42 , and 3261- P44 and clean both the P & J side of these connectors lAW AMM TASK 20-30-03-910-801 . 

# \

Figure 13- 

### RH Nacelle, Location Of 

### The Harnesses To Be Re-Routed 16. Inspect the Harness Conduit for any signs of chafing or damage and if required repair lAW WDM 20- 15-04-201 . See 

### Figure 14. If damage is found on Harness Conduit due to impact damage , inspect the applicable MLG Stabilizer Brace. Inspect the adjacent area around the conduits for any signs of structural damage due to chafing . Report any Stabilizer Brace or structural damage findings to Bombardier Aerospace via the THO .

BT0206.{)5 MW REV 2004-1 0

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A

BT0206-05 MW REV 2004-10 8 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET IS4Q2400028

Inspect These Cables & Adjacent Structure For Possible Signs Of Chafing

Note: The Routing May Vary Between A/C



### Figure 14- RH Nacelle, Area Of Inspection 18

# BOMBARDIER CONTINUATION SHEET 5 CURR ENT REVI SION A B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET IS4Q2400028 19
17. Remove the harness support clamps mounted on the Nacelle "A" frame and pull the harness down . Loosen the harness support clamps along the Nacelle side wall as shown . Cut and remove any tie wraps , tape , or spiral wrap . Inspect removed hardware for cond ition and replace as requi red . See 

### Figure 15. 

# I I

# --- ---n--- ii "**c~~ _A**  'i I· . . . 

# .r -\. 

# ·L 1.

_ _) 

# . . . 

# .

I



# -·-l - - - 

# I 

# i 

# I i 

# i I ' 

# I

RH Nacelle- View FWD On Aft Face Of 'A' Frame 

### Figure 15 - RH Nacelle, Support Clamps Removal 18. Prepare/clean the area shown in 

### Figure 16 where the metal tie mounts (Item 7) , standoff (Item 15) & grommet (Item 2) are to be installed by cleaning with solvent (Isopropyl Alcohol) or equivalent.
B T0206-05 MW REV 2004-1 0

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A 

### B**VI ~**  

### LKG**~O** 

### ON ' A' FRAME I L/H NACEllE 9fll RIH 5 IMILARJ View Looking FWD On Aft Face Of 'A' Frame, LH Nacelle Shown , RH Nacelle Similar, P/N 8Z8527 Shown , Or P/N 85414025 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET IS4Q2400028 

### 20

RH Nacelle- View Looking INBD, LH Side Panel 

### Figure 16- RH Nacelle, Tie Mount 

## & Grommet Installation Preparation 

# 1

19. Install the Click Bond Standoff (Item 15) and Tie Mounts (Item 7) using the dimensions & locations shown in 

### Figures 18 

### & 19 or per Figure 19A 

### & 198, alternate locations. Go to step 20 for alternate Tie Mounts (P/N CSP458-1) installation . 20 . Mark locations and prepare the area for bonding . 

### Surface preparation: Surface preparation is an important part of adhesive bonding . Lightly abrade glossy surfaces to improve the adhesive bond . Just prior to adhesive application , clean surfaces with solvent using clean rags or paper towels . Do not use shop towels, rags or paper wipes contaminated with oil, soap , or reclaimed solvents . Wash one small area at a time , and then dry with a clean cloth before the solvent evaporates to prevent reBT0206-05 MW REV 2004-10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A B 

### MODIFICATION SUMMARY PACKAGE 3 MODS UM NO. 4 SHEET 15402400028 21 

### deposition of contaminants. To maintain a clean solvent supply, always pour the solvent on the washing cloth . 

### Click Bond CB200 Notes: Mix Ratio (B : A) : 8: 1 (volume) , 7 : 1 (weight) , Working time at 75° F: 5 minutes (small quantities) . Cure time at 75° F: 30 minutes- handling strength . 2 hours90% of ultimate strength . 24 hours - full cure . 

### Mixing 

### & Applying CB200 or CB200-40 Adhesive: Dispense 8 parts of component Band one part of component A (by volume) . Mix until a uniform color is obtained (or use a disposable mixing nozzle) . Apply to one of the surfaces to be bonded . To assure maximum bond strength, surfaces must be mated within 2 minutes. Use sufficient material to insure 100% joint fill when parts are mated . All adhesive application , part positioning , and clamping shou ld occur before the 5 min . working time of the m ix has expired . Movement of the parts after working time has expired can result in bond strengths lower than normal. Insure that the assembly remains undisturbed for 30 minutes to allow adhesive cure to progress to the handling strength stage where the fixtures or clamps may be removed . Possible Adhesive (Item 16)

CB200 - 3.5 Gram Foil Pack,

Enough Adhesive For 4-5 Click Bond Bases

2 - Locate fixture on substrate using a template or by aligning index marks with drawn centerline. Press down on outer box to adhere foam tape to substrate. CB200-40 - 40 ml Dual Pack Syringe Cartridge, Used With CB100 , CB81 & CB106

3 -Apply pressure to inner box to

actuate fixture. Plastic springs extrude adhesive bond line and apply positive pressure during adhesive cure. 1- Remove the backing from foam pads on fixture and discard . Apply adhesive to fastener base.

4 - After adhesive has cured , remove fixture by grasping with pliers & discard. 

### Figure 17 - Click Bond 'Tie Mount' 

### & 'Standoff' Installation Procedure
BT0206-05 MW REV 2004- 10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION
v 

### A B

0



### 0.25.

8.75" 

# s.s· "'

X201D 1».500

REF RH Nacelle- View Looking INBD , LH Side Panel 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET 15402400028 

### 22

Click Bond Standoff Item 15,

One Location Note: If Harness Length Is Not Long Enough To Use This Standoff Location For The Transition, See Figure 19A For Alternate Mounting Location For The Standoff

Tie Mount

Item 7 Two Locations



### Figure 18 - RH Nacelle, Tie Mount 

## & Standoff Installation BT0206-05 MW REV 2004-10

# BOMBARDIER CONTINUATION SHEET 5 CURRE NT REVISION 

### Y201D -18.000

REF A B

Keep Cables Below This Reference Line, Aligned With Machined Flange 

### •••••••••••••••••••••••••••• 7.75.**-------~**



### -----**50" ----** **~** 6.00"**--- --~**  

### 3.25"

Existing M ined Flanges On 'A' Frame No Contact With Flanges Or Other Tie Downs 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET IS4Q2400028

Note: If Harness Length Is Not Long

Enough To Use These Tie Mount Locations , See Figure 19B For Alternate Tie Mount Location Configuration

Install Tie Mounts, Item 7 (Qty 4) , With The

Noted Di mensions & Orientation Remove Any Existing Tie Mounts That Don 't Meet The Noted Dimensions & Orientation As Shown 

### 23



# IP/N 8Z8527 Shown , Or P/N 85414025 Dimension Tolerances : (+/- . 100") View Looking FWD On Aft Face Of 'A' Frame, RH Nacelle Shown , LH Nacelle Similar 

### Figure 19 - RH Nacelle, Tie Mount Installation

BT0206-05 MW REV 2004-10

# BOMBARDIER MODIFICATION SUMMARY PACKAGE 3 MODSUM NO . CONTINUATION SHEET 154Q2400028 5 CURRENT REVISI ON 

### A B 

### Y201D



## -18.000



## REF

•••••••••••••••••••••••••• 7.7s.·**-- ----~**  14----- 

### 6.50"

# ----11-1

..... _ 6.00" 

# ------.j 3 .25.

Existing Machined Flanges On 'A' Frame P/N 8Z8527 Shown , Or P/N 85414025 Dimension Tolerances : (+/- . 100" ) No Contact With Flanges Or Other Tie Downs Cl ick Bond Standoff Item 15, Alternate Location 

### Figure 19A- RH Nacelle, Alternate Standoff Location
BT0206.{)5 MW REV 2004-10 4 SHEET 

### 24

# BOMBARDIER CONTINUATION SHEET 5 CURRE NT REVISION A B 

### Y201D



## -18.000



## REF

Existing Machined Flanges On 'A' Frame P/N 8Z8527 Shown , Or P/N 85414025 Dimension Tolerances : (+/- . 100") No Contact With Flanges Or Other Tie Downs 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET 15402400028 

### 25

Install Tie Mounts , Item 7 (Qty 4) , With The Noted Alternate Di mensions & Orientation



### Figure 198 - RH Nacelle, Alternate Tie Mount Location BT0206.Q5 MW REV 2004·10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET 15402400028 

### 26
21. As a alternate to the Click Bond Tie Mounts (P/N B0816035CR3T) , it is acceptable to install tie mount 

# I (PIN CSP458-1) using the dimensions & locations shown in 

### Figures 18 

### & 19 or to Alternate Figure 19A & 198 with Fast-Weld #10 Epoxy Adhesive lAW SRM TASK 51-22-35-02-01 or with EC - 2216 B/A Grey Adhesive lAW SRM TASK 51-22-20-02-01 . Lightly abrade and then clean the contact area of both the tie mount & structure surface before applying adhesive as detailed in step 19. After cure , seal the edges of the tie mount bases with PR 1422 81/2 lAW SRM TASK 51-23-00-00-01 . 22 . Install the MS21266-2N grommet in the location shown in 

### Figure 19 with Fast Weld No . 10 (Refer to SRM51-22-35) or with OHMS A6 .09 epoxy adhesive (Refer to SRM51-22-45) . 23. Reroute 82440841 & 82440850 cables harnesses for AIC 

### (4001-4089) as shown in 

### Figures 21, 22 & 23 using the new standoff and 6 tie wrap mounts .

Note: The Routing May Vary Between AJC This Transition (P/0 82440850) Moves To The

Nacelle Sidewall/Panel Cables Are Moved Below Th is Reference Line, Aligned With Machined Flange



### Figure 20 - RH Nacelle, Harness Cable Re-Routing For A/C (4001-4089) BT0206-05 MW REV 2004-10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION 

### A B Re-Route & Secure The Cables As Shown Move 82440850 Transition To Side Wall. Secure Transition As Shown

With Item 13 (Clamp) & Item 17 (Screw) To Item 15 (Standoff). Orient Clamp Up Or Down To Provide Best Clearance . 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET IS4Q2400028 27

Route 82440850 Cables Under 82440841 Transition & Secure To New Tie Wrap Mounts Using Item 8 (Tie Wraps) As Shown

Keep Cables Below This Reference Line, Aligned With Machined Flange Keep Cables Below This Reference Line, Aligned With Machined Flange

Caution: Don't Over Tighten Tie

Wraps, As This Can

Crush The Inner Conduit.

Note : Due To Cable Length & Routing Variations, There May Be A Spare Tie Mount Not Used . Secure 82440845 Transiti on To Existing StandoffWith Item 12 (Clamp) ; Item 11 (Screw) & Item 10 (Spacer) As Shown Actual Cable Routing Will Vary Due To Cable Length Variations Alternate Cable Routing - With Figure 19A & 198 Alternate Standoff & Tie Mount Location,

If Cable Length Is Too Short
Secure 82440850 With Item 13 (Clamp) & 82440845

With Item 12 (Clamp) To Item 15 (Standoff) With Item 17 (Screw) . Orient Clamps & Transitions To Provide Best Clearance. Loosen Transition Adapters To Adjust Position If Requ ired . 

### Figure 21 - RH Nacelle, Harness Cable Re-Routing For

### AJC (4001-4089) BT0206.{)5 MW REV 2004-10

# BOMBARDIER CONTINUATION SHEET 5 CU RRE NT REVISION A

Cover Cables With Protective (Spiral Wrap, Item 1) As Required B

Secure Cable As Shown To New Tie Mount With Item 8 (Tie Wrap) Adjust Cable Spacing/Separation With Item 9 (CR4H) & Item 8 (Tie Wraps) As Required

Cover Hydraulic Lines With Protective (Spi ral Wrap, Item 1) If Required 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO . 

### 15402400028

Move This Large Condu it (3261-P41) To

1 /B S ide As Shown

Existing Clamp P /N DSC184-6 (Ref) 4 SHEET 

### 28



### Figure 22- RH Nacelle, Harness Cable Re-Routing For

### AJC (4001-4089)

BT0206-05 MW REV 2004-10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVI SION 

### A Adjust Backshell Clamp Angle FWD

As Required To Provide Clearance



### 3261-J42 3261-.J41 B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO . IS4Q2400028

Re- lock Connector Back Shells After Adjusti ng Angle ,

Shown Locked 4 SHEET 

### 29



### Figure 

### 23- RH Nacelle, Harness Cable Re-Routing For AJC (4001-4089) 24. If required , cover wires & cables with sp iral wrap for add itional protection lAW WDM 20- 12-10-20 1 - Wiring - Maintenance Practices . 25 . Re-tighten any support clamps that were moved or loosened . Add fiberglass tape and tie wraps where required to provide clearance and security. Ensure to re- lock any connector back shells that may have been adjusted. 26 . Remove wing root access panels 261 KT (Fwd) & 262NR {Aft). To verify the MLG harness integrity, carry out a continuity and isolation test lAW AMM TASK 20-30- 11-760-801 . Check between connectors 9811-P750 to 3261 -J42 , 3261 -J44 and 9811-P464 to 3261-J41 , 3261 -J43 (Ref. WDM 32- 61-00 & WDM 32-46-00) . After completing the continuity and isolation test, ensure the connectors are cleaned , dried , and then apply a corrosion inhib itor (CPC) to the connectors lAW AMM TASK 20-30- 03-910-801 . Re-install the connectors . Install wing root access panels 261 KT (Fwd) & 262NR (Aft). BT0206-{)5 MW R EV 2004-10

# BOMBARDIER MODIFICATION SUMMARY PACKAGE CONTINUATION SHEET 5 CURRENT REVISION A 3 MODSUM NO . 

### 15402400028 B 

### 27. Remove all tools , equipment and unwanted materials from the RH Nacelle work area . 

### 28. Re-install the LH & RH MLG Stabilizer Strut lAW AMM 

### 32-11-16-400-801 . 4 SHEET 

### 30

29 . With LH & RH MLG Forward Doors still removed from AIC , carry out Operational Test of the Landing Gear Primary Extension and Retraction System lAW AMM TASK 

### 32- 31-00- 710-801 . 30. Swing the landing gear up and leave in the up and locked position . 

### 31 . Inspect the re-worked area in the LH & RH Nacelle and carry out a clearance check between the MLG Stabilizer Brace and the electrical cables . See 

### Figure 24 for reference . Ensure there is 

### 0.100 " minimum clearance between the MLG Stabilizer Brace and the electrical cables .

BT0206.{)5 MW REV 2004-10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A

BT0206-05 MW REV 2004-10 B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET IS4Q2400028 31



### Figure 24- LH 

### & RH Nacelle, Clearance Checks

# BOMBARDIER MODIFICATION SUMMARY PACKAGE 3 MODSUM NO. 4 SHEET CONTINUATION SHEET 5 CURRENT REVISION 

### A IS4Q2400028 

### B 

### 32. After completion of the clearance checks, swing the gear down to the down & locked position . 

### 32



### 33 . Re-install the MLG Forward Doors lAW AMM TASK 

### 32-12-11-400-801 and Rig the doors lAW AMM TASK 

### 32-12-11-830-801. 

# 134. Carry out Operational Test of the Landing Gear Primary Extension and Retraction System lAW AMM TASK 

### 32-31-00-710-801. 35. Carry out Functional Test of the Antiskid System lAW AMM TASK 

### 32-46-00-720-802 36. Lower the aircraft on jacks lAW TASK 

### 07-10-00-582-801 , Subtask 

### 07-10-00-582-021 , Section B. 

### 37. Remove all tools , equipment {Tail stands and Trestles) and unwanted materials from the work area .



### General Notes: 

### 1. All work must be accomplished and signed off by qualified personnel as required by local regulatory authorities. 2 . This rework is limited to the components as specified in IS4Q2400028 . 3. Weight and Balance- No Change. 4. Electrical Load Analysis-No Change

BT0206.{)5 MW REV 2004-10

# BOMBARDIER CONTINUATION SHEET 5 CURRENT REVISION A

BT0206-{)5 MW REV 2004-1 0 B 

### MODIFICATION SUMMARY PACKAGE 3 MODSUM NO .



### Not to be issued to Operators SUBSTANTIATION DATA PCR 44059



### Stress Analysis N/A IS4Q2400028 4 SHEET 33