De-Icing of the Fan Cowl Door Locking Latch No. 1 [CFMI]

TASK 71-13-13-660-802-A
De-Icing of the Fan Cowl Door Locking Latch No. 1

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.

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	GUN - HOT AIR - MAX OPERATING 55 DEG.C (131 DEG.F)
No specific	AR	WARNING NOTICE(S)

3. Job Set-up
Subtask 71-13-13-941-078-A ** ON A/C NOT FOR ALL

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) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
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) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

4. Procedure
Subtask 71-13-13-660-053-A ** ON A/C NOT FOR ALL

A. Removal of the Ice Build-up from the Fan Cowl Lockable Hinge Latch

CAUTION: DO NOT LET THE LOCKABLE LATCH TEMPERATURE INCREASE TO MORE THAN 55 DEG.C (131 DEG.F). IF THE TEMPERATURE OF THE LATCH IS MORE THAN THIS LIMIT, DAMAGE CAN OCCUR.

(1) Use a GUN - HOT AIR - MAX OPERATING 55 DEG.C (131 DEG.F) to apply warm air along the length of the latch handle and into the lock mechanism if the key cannot be inserted.

5. Close-up
Subtask 71-13-13-942-060-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:22:29 UTC