Installation of the Upper HP Duct and Mid Stage T-Duct Assembly Links

TASK 36-11-49-400-842-A
Installation of the Upper HP Duct and Mid Stage T-Duct Assembly Links

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

ZONE: 400

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 60 and 54 lbf.in (0.68 and 0.61 m.daN )
No specific	Torque wrench: range to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP8001)	lockwire 0.032 in. (0.8 mm) dia.
(Material No.CP8002)	lockwire 0.032 in. (0.8 mm) dia

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 49-00-00-860-006-A	APU Shutdown by External Power
TASK 49-00-00-860-006-A-01	APU Shutdown by Batteries
TASK 49-00-00-860-009-A	APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01	APU Shutdown by Batteries (131-9(A))
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
Upper HP Duct-Links
Upper HP Duct-Links
Mid-Stage T-Duct Links
FOR [1000EM1] (ENGINE-1)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
FOR [1000EM2] (ENGINE-2)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors

3. Job Set-up
Subtask 36-11-49-860-144-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).

Subtask 36-11-49-941-164-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred for not less than five minutes before you do this procedure.
(2) On AIR COND panel 30VU:

Make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on)
Make sure that the APU BLEED pushbutton switch is released (the ON legend is off)
Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.

(3) On ENG panel 115VU:

Put a WARNING NOTICE(S) in position to tell persons not to start the engine 1(2).

(4) On the HP ground connector:

Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.

(5) On the ENG section of maintenance panel 50VU:

Make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off
Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).

Subtask 36-11-49-865-257-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
FOR FIN: 1000EM2 (ENGINE2)
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22

Subtask 36-11-49-010-322-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the fan cowl doors are open:
(a) FOR [1000EM1] (ENGINE-1)

437AL and 438AR (Ref. AMM TASK 71-13-00-010-040).

(b) FOR [1000EM2] (ENGINE-2)

447AL and 448AR (Ref. AMM TASK 71-13-00-010-040).

Subtask 36-11-49-040-198-A ** ON A/C NOT FOR ALL

E. Deactivation of the Thrust Reverser (T/R) System

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that the T/R is unserviceable for maintenance (Ref. AMM TASK 78-30-00-481-041).

Subtask 36-11-49-010-326-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Make sure that the T/R doors are open:
(a) FOR [1000EM1] (ENGINE-1)

451AL and 452AR (Ref. AMM TASK 78-36-00-010-040).

(b) FOR [1000EM2] (ENGINE-2)

461AL and 462AR (Ref. AMM TASK 78-36-00-010-040).

(2) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position below the engine.

4. Procedure
Subtask 36-11-49-420-171-A ** ON A/C NOT FOR ALL

A. Installation of the Upper HP Duct Links

PRE SB RA32036-10

Upper HP Duct-Links ** ON A/C NOT FOR ALL

(1) If you use the APU to energize the electrical circuits, stop the APU:

For GTCP 36-300 APU (Ref. AMM D/O 49-00-00-86)
For APS 3200 APU (Ref. AMM TASK 49-00-00-860-006)
For 131-9(A) APU (Ref. AMM TASK 49-00-00-860-009).

(2) In the cockpit, on the SD bleed page:
(a) Make sure that the pressure and the temperature of the bleed-air duct system are in ambient conditions.

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

WARNING: DO NOT TOUCH THE UNIT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

(3) Install the upper HP duct links (2) and (3) on the brackets (6) and (12) at STA. 239 and STA. 233 as follows:
(a) Adjust the link (2) to approximately 3.3 in. (83.82 mm) between hole centers.

NOTE: This value is nominal. You can adjust it to facilitate the assembly of the duct.

(b) Temporarily install the link (2) on the bracket (6) with the bolt (9), bushing (7), washer (8) and nut (10).

NOTE: Make sure the countersunk side of the washer (8) is against the bolt (9) head.

(c) Temporarily attach the link (2) to the upper HP duct with the bolt (5), washer (4) and nut (1).
(d) Adjust the link (2) to permit the bolt to enter without binding.
(e) TORQUE the adjustment nut (11) on the support link to between 60 and 54 lbf.in (0.68 and 0.61 m.daN )

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(f) Safety the nut (11) with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia
(g) Install the link (2) on the bracket (6) with the bolt (9), bushing (7), washer (8) and nut (10).

NOTE: Make sure the countersunk side of the washer (8) is against the bolt (9) head.

(h) Attach the link (2) to the upper HP duct with the bolt (5), washer (4) and nut (1).

NOTE: Make sure the countersunk side of the washer (4) is against the bolt (5) head.

(i) TORQUE the nuts (1) and (10) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )

.
(j) Adjust the link (3) to approximately 2.62 in. (66.55 mm) between hole centers.

NOTE: This value is nominal. You can adjust it to facilitate the assembly of the duct.

(k) Install the link (3) on the bracket (12) with the bolt (9), bushing (7), washer (8) and nut (10) temporarily.

NOTE: Make sure the countersunk side of the washer (8) is against the bolt (9) head.

(l) Attach the link (3) to the upper HP duct with the bolt (5), washer (4) and nut (1) temporarily.
(m) Adjust the link (3) to permit the bolt to enter without binding.
(n) TORQUE the adjustment nut (11) on the support link to between 60 and 54 lbf.in (0.68 and 0.61 m.daN )

(o) Safety the nut (11) with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.
(p) Install the link (3) on the bracket (12) with the bolt (9), bushing (7), washer (8) and nut (10).

NOTE: Make sure the countersunk side of the washer (8) is against the bolt (9) head.

(q) Attach the link (3) to the upper HP duct with the bolt (5), washer (4) and nut (1).

NOTE: Make sure the countersunk side of the washer (4) is against the bolt (5) head.

(r) TORQUE the nuts (1) and (10) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )

.

END PRE SB RA32036-10

POST SB RA32036-10

Upper HP Duct-Links ** ON A/C NOT FOR ALL

(4) Install the upper HP duct link (2) on the bracket (5) at STA. 239 as follows:
(a) Adjust the link (2) to approximately 3.3 in. (83.82 mm) between hole centers.

NOTE: This value is nominal. You can adjust it to facilitate the assembly of the duct.

(b) Install the link (2) on the bracket (5) with the bolt (8), bushing (6), washer (7) and nut (9) temporarily.

NOTE: Make sure the countersunk side of the washer (7) is against the bolt (8) head.

(c) Attach the link (2) to the upper HP duct with the bolt (3), washer (4) and nut (1) temporarily.
(d) Adjust the link (2) to permit the bolt to enter without binding.
(e) TORQUE the adjustment nut (10) on the support link to between 60 and 54 lbf.in (0.68 and 0.61 m.daN )

(f) Safety the nut (10) with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.
(g) Install the link (2) on the bracket (5) with the bolt (8), bushing (6), washer (7) and nut (9).

NOTE: Make sure the countersunk side of the washer (7) is against the bolt (8) head.

(h) Attach the link (2) to the upper HP duct with the bolt (3), washer (4) and nut (1).

NOTE: Make sure the countersunk side of the washer (4) is against the bolt (3) head.

(i) TORQUE the nuts (1) and (9) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )

.

END POST SB RA32036-10

Subtask 36-11-49-420-172-A ** ON A/C NOT FOR ALL

B. Installation of the Mid Stage T-Duct Assembly Links

Mid-Stage T-Duct Links ** ON A/C NOT FOR ALL

(1) Install the mid stage T links (5) and (4) on the brackets (7) and (12) at STA. 215 as follows:
(a) Adjust the link (5) to approximately 8.2 in. (208.28 mm) between hole centers.
(b) Install the link (5) on the bracket (7) with the bolt (10), bushing (8), washer (9) and nut (6).

NOTE: Make sure the countersunk side of the washer (9) is against the bolt (10) head.

(c) Adjust the link (4) to approximately 3.86 in. (98.04 mm) between hole centers.
(d) Install the link (4) on the bracket (12) with the bolt (10), bushing (8), washer (9) and nut (6).

NOTE: Make sure the countersunk side of the washer (9) is against the bolt (10) head.

(2) Attach the links (5) and (4) to the T-duct with the bolts (3), washers (2) and nuts (1). If necessary, loosen the locknut and adjust the links (5) and (4) to permit the bolts (3) to enter without binding.
(3) Hold the eyebolts on the links (5) and (4) in position and TORQUE the adjustment nut (11) on the support link to between 60 and 54 lbf.in (0.68 and 0.61 m.daN )

. Safety the nut (11) with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.
(4) Attach the links (5) and (4) to the T-duct with the bolts (3), washers (2) and nuts (1).

NOTE: Make sure the countersunk side of the washer (2) is against the bolt (3) head.

(5) TORQUE the nuts (1) and (6) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )

5. Close-up
Subtask 36-11-49-410-238-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Remove the access platform(s).
(2) Close the T/R doors:
(a) FOR [1000EM1] (ENGINE-1)

451AL and 452AR (Ref. AMM TASK 78-36-00-410-040).

(b) FOR [1000EM2] (ENGINE-2)

461AL and 462AR (Ref. AMM TASK 78-36-00-410-040).

Subtask 36-11-49-440-139-A ** ON A/C NOT FOR ALL

B. Reactivation of the T/R System
(1) Make the T/R serviceable after maintenance (Ref. AMM TASK 78-30-00-081-041).

Subtask 36-11-49-410-239-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors:
(a) FOR [1000EM1] (ENGINE-1)

437AL and 438AR (Ref. AMM TASK 71-13-00-410-040).

(b) FOR [1000EM2] (ENGINE-2)

447AL and 448AR (Ref. AMM TASK 71-13-00-410-040).

(2) Remove the WARNING NOTICE(S).

Subtask 36-11-49-865-258-A ** ON A/C NOT FOR ALL

D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
FOR FIN: 1000EM2 (ENGINE2)
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22

Subtask 36-11-49-862-129-A ** ON A/C NOT FOR ALL

E. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002) or or (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:10:55 UTC