Removal of the F1 Hinge Beam [CFML]

TASK 71-13-46-000-802-A
Removal of the F1 Hinge Beam

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	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	MAT - PROTECTIVE
No specific	AR	WARNING NOTICE(S)
98N7110H003-000	1	FAN COWL PROTECTION BULLETS KIT

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
F1 Hinge Beam

3. Job Set-up
Subtask 71-13-46-941-052-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) 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).

Subtask 71-13-46-010-052-A

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) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

4. Procedure
Subtask 71-13-46-020-051-A

A. Removal of the F1 Hinge Beam
(1) Install the MAT - PROTECTIVE on the lateral zone of the fan case.
(2) Get access to the F1 hinge beam (1).

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(3) Remove and discard the pin (6).
(4) Remove the nut (5) and washer (4). Discard the nut (5).
(5) If available, use the 98N7110H003-000 FAN COWL PROTECTION BULLETS KIT, to attach the bullet thread protector (3) to the forward hinge bolt (2).
(6) Extract the forward hinge bolt (2) from the fan cowl forward hinge fitting (7) use the bullet thread protector (3).
(7) Remove the bullet thread protector (3) from the forward hinge bolt (2).
(8) Remove the end of the F1 hinge beam (1) from the fan cowl forward fitting.
(9) Put the F1 hinge beam end (1) on the MAT - PROTECTIVE.

NOTE: The F1 hinge beam (1) removal task on the right fan cowl door is similar to the one described for the left fan cowl door.

[Rev.10 from 2021] 2026.04.01 12:58:06 UTC