BOMBARDIER 

MODIFICATION SUMMARY PACKAGE 

1 CERTIFYING AUTHORITY NO. 2 MODELl TYPE 3 MODSUM NO. COMPLETE D 4 SHEE~ 

Not Applicable ~-· ·~,___, .. ~~ 

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 ~ 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 DerricD~lugherty b.f~,,~ llou~~f:f, 

t\ 

IAu..-. 

lJ ~()~£. ~ihn/2 i\... ~- .J. ~:,vb, 

22 DESIGN lv~e Golnbas 1 ~V'ij_ ~C"-\0~ 'r'IAJ zljl.j~ ~ .. v / 'LD I rz._ ~G· Of f.Jb\t '"Z.. 

23 DESIGN AUTHORITY 1\: , 1\AA:£ IN u l11vJl.\ ~~ 11 J nA V>t2/06/2( 

. M·\1.\~!JCii\lQ 20\L/.12/05 

24 .PP&e-~-efeo 5e. /.// Zt>I2-06-;!2 'AI -;t_::; l'l f I 2 I (f n,£0 S#TI'}/Ns;.k )' ~ 

5 CURRENT REVISION 

21 ORIGINATOR 

22 DESIGN 

23 DESIGN AUTHORITY 

24 PP&C 

25 REVISION DESCRIPTION 

A-lnitiallssue lt<rr/J5!T SH£ET#f51()]f 

{3- Aclcl f-1G-U-R£::s JqA + 19 B - A-J..1£~,.)A-TE.. }._cc.A-rtc.J f-oll ... '§tA:~~FF+--ftt daowts 

- AJ~ A-olJ..d-·,.,,.)A-L W~M~ A-VV\Ifl'\ R.f:.f£.e.G-~ct:r-. 

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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 PL T2S-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 CURRENT 

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 side 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) are to be installed by cleaning 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 

REVISION 

A B 

IE~ LKG FWD ON 'A' FRAME 

IL/H ~ 9-N RIH S IMILAR! 

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 

--

-

I 

I j 

5Jr 

~-

lP 

..... l 

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 

REVISION 

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 Other Tie 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 & Orientation 

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 with 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 

Standoff With 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 

REVISION 

326t -J23 

A B 

Adjust Cable 

Spacing/Separation 

With Item 9 (CR4H) & 

Item 8 (Tie Wraps) 

Secure Cable As Shown 

To New Tie Mount With 

Item 8 (Tie Wrap) 

Adjust Backshell 

Clamp Angle FWD 

As Required To 

Provide Clearance 

Cover Cables With 

Protective (Spiral 

Wrap, Item 1) As 

Required 

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} 

BT0206-05 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 Machined 

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 

REVISION 

A B 

MODIFICATION SUMMARY PACKAGE 

3 MODSUM NO. 4 SHEET 

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 

Mount With 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 

REVISION 

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 

REVISION 

A B 

I 

15. 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 CURRENT 

REVISION 

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 condition and replace as required. See 

Figure 15. 

II ------n---

i i " 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. 

BT0206-05 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 I MILAR J 

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 MODSUM 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 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 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 CURRENT 

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 Dimensions & 

Orientation 

Remove Any Existing 

Tie Mounts That Don't 

Meet The Noted 

Dimensions & 

Orientation As Shown 

23 

I P/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 

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BOMBARDIER 

MODIFICATION SUMMARY PACKAGE 

3 MODSUM NO. 

CONTINUATION SHEET 154Q2400028 

5 CURRENT 

REVISION 

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 

Click 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 CURRENT 

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 

Dimensions & Orientation 

Figure 198 - RH Nacelle, Alternate Tie Mount Location 

BT0206.Q5 MW REV 2004·10 
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CONTINUATION SHEET 

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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 

This 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 Transition 

To Existing Standoff With 

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 Required. 

Figure 21 - RH Nacelle, Harness Cable Re-Routing For AJC (4001-4089) 

BT0206.{)5 MW REV 2004-10 
BOMBARDIER 

CONTINUATION SHEET 

5 CURRENT 

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 

(Spiral Wrap, Item 1) 

If Required 

MODIFICATION SUMMARY PACKAGE 

3 MODSUM NO. 

15402400028 

Move This Large 

Conduit (3261-P41) To 

1/B Side 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 

REVISION 

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 

Adjusting 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 spiral wrap for additional protection lAW WDM 20-12-10-201 -

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 inhibitor (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 REV 2004-10 
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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. 

1

34. 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