Deactivation of the Fan Cowl Loss Prevention System [CFML]

TASK 71-13-00-040-820-A
Deactivation of the Fan Cowl Loss Prevention System

WARNING: BE CAREFUL WHEN YOU WORK ON THE ENGINE COMPONENTS IMMEDIATELY AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS CAN STAY HOT FOR UP TO ONE HOUR.

WARNING: MAKE SURE THAT YOU USE THE FAN COWL DOOR SLING TO HOLD EACH FAN COWL IN THE OPEN POSITION. IF THE SLING IS NOT USED, THE COWL WILL NOT BE HELD CORRECTLY AND CAN CLOSE QUICKLY. THIS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO THE COWL.

CAUTION: DO NOT EXTEND THE SLATS WHEN THE FAN COWLS AND THE THRUST REVERSER COWLS ARE OPEN. IF YOU DO THIS, DAMAGE TO THE AIRCRAFT CAN OCCUR.

1. Reason for the Job
CDL 71-44
Fan Cowl Loss Prevention System Teleflex
CDL 71-45
Fan Cowl Loss Prevention System Lever
CDL 71-47
Tension Flag Spring
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)

B. Work Zones and Access Panels

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

C. 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
TASK 71-13-41-000-804-A	Removal of the Push-Pull Cable
TASK 71-13-41-000-805-A	Removal of the Flag Assy
TASK 71-13-41-400-805-A	Installation of the Flag Assy

3. Job Set-up
Subtask 71-13-00-941-099-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 a WARNING NOTICE(S) 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) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 71-13-00-010-122-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl-doors (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) Get access to the latch detection assembly in the left fan cowl-door.
(3) Put an ACCESS PLATFORM 2M (6 FT) in position.

4. Procedure
Subtask 71-13-00-040-053-A ** ON A/C NOT FOR ALL

A. Deactivation of the Loss Prevention System
(1) Remove the push-pull cable (1) (Ref. AMM TASK 71-13-41-000-804).
(2) Remove the flag assembly (2) (Ref. AMM TASK 71-13-41-000-805).
(3) Install the cover (3) with the bolts (5) and the washers (4) (Ref. AMM TASK 71-13-41-400-805).

5. Close-up
Subtask 71-13-00-410-115-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) 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).

Subtask 71-13-00-860-069-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) Make an entry in the logbook to tell that you did the deactivation of the fan cowl loss prevention system.

[Rev.8 from Aug 2017] 2026.04.02 06:33:18 UTC