Installation of the V-Retainer Couplings and Seals at the Starter Air Duct [CFML]

TASK 80-12-49-400-801-A
Installation of the V-Retainer Couplings and Seals at the Starter Air Duct

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

WARNING: IF IT IS NECESSARY TO ENERGIZE THE AIRCRAFT FOR MAINTENANCE WORK WHILE YOU DO THIS MAINTENANCE PROCEDURE, MAKE SURE THAT ONLY EXTERNAL POWER IS USED. THE USE OF APU OR ENGINE POWER CAN CAUSE PRESSURIZED AIR LEAKAGE IN THE PNEUMATIC SYSTEM AND INJURY CAN OCCUR.

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	1	ACCESS PLATFORM 2M (6 FT)
No specific	1	MALLET - PLASTIC
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.76 and 0.64 m.daN (67.26 and 56.64 lbf.in )
No specific	Torque wrench: range to between 1.13 and 0.96 m.daN (100.00 and 84.96 lbf.in )
No specific	Torque wrench: range to between 1.40 and 1.20 m.daN (123.89 and 106.19 lbf.in )
No specific	Torque wrench: range to between 1.41 and 1.30 m.daN (124.78 and 115.04 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00062)	LUBRICATING OIL TURBINE ENGINE SYNT BASE

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	SEAL	AIPC 80-12-49-01-080
15	SEAL	AIPC 80-12-49-01-090

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
Starter Air Duct

3. Job Set-up
Subtask 80-12-49-941-051-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(3) On the overhead control and indicator panel 25VU, on the Auxiliary Power Unit (APU) section:
(a) Make sure that the APU MASTER SW pushbutton is released.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the APU.

Subtask 80-12-49-010-051-A

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position on the left side of the engine.

4. Procedure
Subtask 80-12-49-420-050-A

A. Installation of the V-Retainer Coupling and Seal between the Starter Air Duct and the Pylon
(1) Remove all the COVER - PROTECTION and the CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Lubricate the threads of the four bolts (6) and the two bolts (12) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(3) Put a new AIPC 80-12-49-01-080 SEAL (2) in position on the flange of the pylon duct elbow (1).
(4) Align the upper flange of the starter air duct (3) with the flange of the pylon duct elbow (1).
(5) Assemble the V-retainer coupling (4) around the two flanges and tighten the nut with your hand.
(6) If removed, install and tighten the two bolts (12) that attach the starter air duct (3) to the support bracket (11) with your hand.
(7) If removed, install and tighten the two bolts (6), clamp saddle (7) and clamp (5) to the support bracket (8) at two locations with your hand.
(8) TORQUE the two bolts (12) to between 1.40 and 1.20 m.daN (123.89 and 106.19 lbf.in )

.
(9) TORQUE the two bolts (17) to between 1.40 and 1.20 m.daN (123.89 and 106.19 lbf.in )

.
(10) TORQUE the four bolts (6) to between 0.76 and 0.64 m.daN (67.26 and 56.64 lbf.in )

.
(11) Torque the upper V-retainer coupling (4) as follows:
(a) TORQUE the nut on the V-retainer coupling (4) to between 1.41 and 1.30 m.daN (124.78 and 115.04 lbf.in )

.
(b) Lightly tap around the outer diameter of the V-retainer coupling (4) with a MALLET - PLASTIC. Do not hit the latch mechanism on the V-retainer coupling.
(c) TORQUE the nut on the V-retainer coupling (4) to between 1.41 and 1.30 m.daN (124.78 and 115.04 lbf.in )

a second time.

Subtask 80-12-49-420-051-A

B. Installation of the V-Retainer Coupling and Seal between the Starter Air Duct and the Starter Air Valve
(1) Remove all the COVER - PROTECTION and the CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Lubricate the threads of the four bolts (6), the two bolts (12), and the two bolts (17) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(3) Put a new AIPC 80-12-49-01-090 SEAL (15) in position on the flange of the starter air valve (14).
(4) Align the lower flange of the starter air duct (3) with the flange of the starter air valve (14).
(5) Assemble the V-retainer coupling (13) around the two flanges and tighten the nut with your hand.
(6) Loosely install the two bolts (17) that attach the starter air duct (3) on the support bracket (16).
(7) If removed, install and tighten the two bolts (12) that attach the starter air duct (3) to the support bracket (11) with your hand.
(8) If removed, install and tighten the two bolts (6), clamp saddle (7), and clamp (5) to the support bracket (8) at two locations with your hand.
(9) TORQUE the two bolts (12) to between 1.40 and 1.20 m.daN (123.89 and 106.19 lbf.in )

.
(10) TORQUE the two bolts (17) to between 1.40 and 1.20 m.daN (123.89 and 106.19 lbf.in )

.
(11) TORQUE the four bolts (6) to between 0.76 and 0.64 m.daN (67.26 and 56.64 lbf.in )

.
(12) Torque the lower V-retainer coupling (13) as follows:
(a) TORQUE the nut on the V-retainer coupling (13) to between 1.13 and 0.96 m.daN (100.00 and 84.96 lbf.in )

.
(b) Lightly tap around the outer diameter of the V-retainer coupling (13) with a MALLET - PLASTIC. Do not hit the latch mechanism on the V-retainer coupling.
(c) TORQUE the nut on the V-retainer coupling (13) to between 1.13 and 0.96 m.daN (100.00 and 84.96 lbf.in )

a second time.

5. Close-up
Subtask 80-12-49-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:45:36 UTC