Opening of the Fan Cowl Doors [CFML]

TASK 71-13-00-010-803-A
Opening of the Fan Cowl Doors

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: MAKE SURE THAT THE TELESCOPIC HOR'S ARE LOCKED CORRECTLY IN THE EXTENDED POSITION. IF THEY ARE NOT, THE COWL DOORS CAN CLOSE ACCIDENTALLY.

WARNING: WHEN THIS OPERATION IS DONE BY TWO PERSONS, MAKE SURE THAT THE MAXIMUM WIND SPEED IS NOT MORE THAN 40 KNOTS (74 KM/H). INJURY TO PERSONS AND/OR DAMAGE TO THE ENGINE CAN OCCUR IF THE WIND MOVES THE FAN COWL(S).

WARNING: IF YOU ARE THE ONLY PERSON TO DO THIS PROCEDURE, MAKE SURE THAT:

THE GROUND IS DRY AND CLEAN, AND
THE MAXIMUM WIND SPEED IS NOT MORE THAN 10 KNOTS (19 KM/H).

IF YOU DO NOT OBEY THESE PRECAUTIONS, INJURY TO PERSONS AND/OR DAMAGE TO THE ENGINE CAN OCCUR.

WARNING: DO NOT KEEP A FAN COWL DOOR OPEN WHEN THE WIND SPEED IS 45 KNOTS (83 KM/H) OR MORE. IF THE WIND MOVES THE FAN COWL DOOR, INJURY TO PERSONS AND/OR DAMAGE TO THE ENGINE AND ADJACENT COMPONENTS CAN OCCUR.

CAUTION: WHEN YOU HANDLE THE LATCHES, DO NOT USE TOO MUCH FORCE. IF EXCESSIVE FORCE IS NECESSARY, DO AN INSPECTION OF THE FAN COWL DOORS.

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.

NOTE: Engine run up to idle is allowed with the fan cowls doors open.

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	INSPECTION CREEPER
No specific	AR	WARNING NOTICE(S)
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION
98D27803500001	1	LOCKING TOOL ZERO POS

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS

C. Referenced Information

REFERENCE	DESIGNATION
Opening/Closing of the Fan Cowl Doors
Installation of the Rear Hold Open Rods in Stowed Position
Illustration of the Installation of the Rear Hold Open Rods in Serviceable Position
Operation of the Hold Open Rods

3. Job Set-up
Subtask 71-13-00-941-079-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 the 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 maintenance panel 50VU, on the ENG section:
(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).
(3) Installation of the locking device:

CAUTION: MAKE SURE THAT THE SLAT IS IN THE FULLY RETRACTED POSITION. IF IT IS NOT IN THE FULLY RETRACTED POSITION, IT CAN GET DAMAGED.

(a) Make sure that the slat is in the fully retracted position (Slat/Flap Lever in ZERO Position).
(b) Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION or the 98D27803500001 LOCKING TOOL ZERO POS on the flap slat lever.

Subtask 71-13-00-010-091-A

B. Get Access
(1) Put the INSPECTION CREEPER in position below the engine at the fan cowl location.
(2) Get access to latch zone.

4. Procedure

NOTE: It is possible to do this task with one person, but for convenience (wind gust, fan cowl door weight), two persons are recommended.

Subtask 71-13-00-010-092-A

A. Opening of the Fan Cowl Doors
(1) Left fan cowl door:
(a) Follow this sequence:
1 Push the trigger (3) to release the L1 latch handle and pull the L1 latch handle (6).
2 Push the trigger (3) to release the L3 latch handle and pull the L3 latch handle (4).
3 Push the trigger (3) to release the L2 latch handle and pull the L2 latch handle (5).
(b) Move the fan cowl door (1) in order to disengage the spigots and generate a gap between fan cowl door and the air intake cowl.

NOTE: When the forward latch is open, the cowl loss prevention flag is deployed on the left fan cowl door. If the flag is not deployed on the left fan cowl door, you must examine the system for blockage.

NOTE: The fan cowl door must sustain this gap while the mechanic goes to the forward lateral side of the fan cowl door.

(c) In the fan cowl door forward position, pull the fan cowl door in order to open it to the fully open position (53.5°).
(d) Make sure the FWD Hold Open Rod (HOR) is locked.

WARNING: MAKE SURE THAT THE INDICATOR OF THE HOLD-OPEN ROD (HOR) IS GREEN (LOCKED). IF IT IS NOT GREEN, THE HOR IS NOT LOCKED CORRECTLY AND INJURY TO PERSONNEL AND DAMAGE TO EQUIPMENT CAN OCCUR.

1 Make sure that the front Hold Open Rod (HOR) is locked correctly (the green mark comes into view).
(e) Get Access to the Rear Hold Open Rod (HOR).

WARNING: ALWAYS LOCK THE TWO HOLD-OPEN RODS (HOR'S) BEFORE YOU DO WORK BELOW THE FAN COWL DOOR(S). IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT CAN OCCUR.

1 Get access to the rear HOR (7) and move the lock ring to release the rod from its stowage bracket (8).
(f) Attach the rear HOR (7) to the fitting on the engine case (9).
(g) Make sure that the rear HOR (7) is attached correctly.
(h) Close the HOR (7).

WARNING: MAKE SURE THAT THE INDICATOR OF THE HOLD-OPEN ROD (HOR) IS GREEN (LOCKED). IF IT IS NOT GREEN, THE HOR IS NOT LOCKED CORRECTLY AND INJURY TO PERSONNEL AND DAMAGE TO EQUIPMENT CAN OCCUR.

1 Pull the fan cowl to lock the HOR.
(2) Right fan cowl door:
(a) Make sure that the latches are not closed on themselves.
(b) Check of the latch handles

CAUTION: DO NOT ENGAGE THE LATCH HANDLE HOOKS WHEN THE FAN COWL DOORS ARE OPEN.

1 Check the latch handles.

Subtask 71-13-00-970-064-A

B. Make a record in the aircraft logbook to tell that you opened the fan cowl doors.

[Rev.10 from 2021] 2026.04.01 04:28:32 UTC