Installation of the T12 Boss Bonding Strap [CFML]

TASK 71-60-42-400-804-A
Installation of the T12 Boss Bonding Strap

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.

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	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 74.5 and 67.5 lbf.in (0.84 and 0.76 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-60-42-000-801-A	Removal of the Air Intake Cowl T12 Access Panel
TASK 71-60-42-400-801-A	Installation of the Air Intake Cowl T12 Access Panel
T12 Boss Bonding Strap

3. Job Set-up
Subtask 71-60-42-941-057-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).

Subtask 71-60-42-010-059-A

B. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position.
(2) Make sure that the T12 sensor access panel is removed (Ref. AMM TASK 71-60-42-000-801).

4. Procedure
Subtask 71-60-42-420-053-A

A. Installation of the T12 Boss Bonding Strap (1):
(1) Lubricate the bolts (2) with the engine oil (Material No.CP2442) .
(2) Install the bonding strap (1) on the air intake structure (3) aft bulkhead with a bolt (2).
(3) Install the other end of the bonding strap (1) on the lug of the T12 boss (4) with a bolt (2).
(4) TORQUE the bolts (2) to between 74.5 and 67.5 lbf.in (0.84 and 0.76 m.daN )

5. Close-up
Subtask 71-60-42-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the T12 sensor access panel (Ref. AMM TASK 71-60-42-400-801).
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:33:31 UTC