Closing of the Fan Cowls with One or No Hold Open Rods Attached 437AL(447AL),438AR(448AR) [IAE]

TASK 71-13-00-410-011-A
Closing of the Fan Cowls with One or No Hold Open Rods Attached 437AL(447AL),438AR(448AR)

WARNING: THE INSTRUCTIONS IN THIS TASK MUST BE OBEYED. IF NOT, THE COWL DOORS CAN CLOSE QUICKLY AND CAUSE INJURY TO PERSONS BETWEEN THE COWL DOORS AND THE ENGINE.

WARNING: BE CAREFUL WHEN YOU OPEN OR CLOSE THE FAN COWLS. THE LEFT FAN COWL WEIGHS 93 LB (42 KG). THE RIGHT FAN COWL WEIGHS 103 LB (47 KG). IF A FAN COWL FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

CAUTION: DO NOT TRY TO REMOVE THE KEY FROM THE LATCH WHEN THE LATCH IS OPEN. THE KEY CAN BE REMOVED ONLY WHEN THE LATCH IS CLOSED AND FULLY LOCKED WITH THE CLEVIS ENGAGED. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE KEY AND FLAG ASSEMBLY OR TO THE LATCH CAN OCCUR.

CAUTION: DO NOT USE TOOLS ON THE KEY AND FLAG ASSEMBLY. OPERATE THE KEY BY HAND ONLY. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE KEY AND FLAG ASSEMBLY OR TO THE LATCH CAN OCCUR.

CAUTION: DO NOT APPLY TOO MUCH FORCE TO TURN THE KEY IN THE LATCH. DAMAGE TO THE KEY AND FLAG ASSEMBLY OR TO THE LATCH CAN OCCUR.

1. Reason for the Job
This procedure supplies the information to close the left or the right fan cowl doors.

NOTE: SBN71-0331 (equivalent to Airbus service bulletin SB 71-1069) introduces a lockable latch in the forward position (No. 1) that must be opened and closed and locked with a key and flag assembly. The key and flag assembly is stowed in the cockpit and must not be used if there is damage to the key or flag.

Refer to the CDL TASK: 71-09 FAN COWL HOLD OPEN ROD
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	SCREWDRIVER - PHILLIPS HEAD
No specific	1	WARNING NOTICE(S)
HA2273-1	1	KEY AND TETHERED FLAG

B. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-800-010-A	Functional Check of Fan Cowl Latch Tension
TASK 72-61-49-400-010-B	Installation of the Gearbox Breather Outlet Duct (GBOD)
Fan Cowl - Opening/Closing

3. Job Set-up
Subtask 71-13-00-860-056-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

4. Procedure
Subtask 71-13-00-410-079-B ** ON A/C NOT FOR ALL

A. Closing of the Fan Cowl Doors

CAUTION: MAKE SURE THAT THE ENGINE FAN-CASE AREA IS CLEAR OF TOOLS AND EQUIPMENT BEFORE YOU CLOSE THE FAN COWL(S). THE COWL(S) CAN GET DAMAGED IF THEY HIT AN OBJECT.

CAUTION: DO NOT LET THE FAN COWL DOOR FALL SUDDENLY. IF THE COWL DOOR FALLS, IT CAN GO TO AN ALMOST CLOSED POSITION BUT THE LATCHES WILL NOT ENGAGE CORRECTLY.

CAUTION: DO NOT LEAVE THIS JOB AFTER JUST CLOSING THE FAN COWLS, CONTINUE ON TO SECURE THE LATCHES. IF YOU ARE CALLED AWAY PRIOR TO LATCHING, THEN EITHER RE-OPEN ONE COWL DOOR OR LATCH THE LATCHES BEFORE WALKING AWAY FROM THIS ENGINE.

(1) Hold the fan cowl door.
(2) Disengage one of the hold-open rods (2), (16) or (17) from its attach point bracket.
(a) Disengage the lock-arm (29) and move the release collar (30) towards the permanently attached end of the rod.

NOTE: The word UNLOCKED can be seen when the release collar is in the not locked position.

(b) Move the push-lock collar (31) towards the permanently attached end of the rod.
(c) Disengage the push-lock (32) from the attach point bracket.
(d) Let the push-lock collar (31), the release collar (30) and the lock-arm (29) go to their locked positions.
(3) If installed, engage the hold-open rod (2),(16) or (17) in to its stowing bracket.
(a) Disengage the lock-arm (29) and move the release collar (30) towards the permanently attached end of the rod.

NOTE: The word UNLOCKED can be seen when the release collar is in the not locked position.

(b) Push the inner part of the rod fully into the outer part of the rod.
(c) Move the push-lock collar (31) towards the permanently attached end of the rod.
(d) Put the push-lock (32) into the stowing bracket.
(e) Let the push-lock collar (31), the release collar (30) and the lock-arm (29) go to their locked positions.
(f) Make sure that the push-lock assembly engages correctly and locks in the stowing bracket.
(4) Do again steps (1) through (3) for the other hold-open rod if installed.
(5) Adjust the hoist and lower the cowl door slowly.
(6) Do again steps (1) through (5) for the other cowl door.
(7) If the fan cowl door(s) has(have) been replaced, make a check of the adjustment of the latches and the locating spigots (Ref. AMM TASK 71-13-00-800-010)
(8) Remove the sling.
(a) Remove the sling (IAE1N20104) from the hoist.

Fan Cowl - Opening/Closing ** ON A/C NOT FOR ALL

(b) Install the caps (55) in the left and right fan cowls.

Fan Cowl - Opening/Closing ** ON A/C NOT FOR ALL

(9) Release the fan cowl doors from the hold-open device (44).

WARNING: USE A PHILLIPS SCREWDRIVER OF SUFFICIENT LENGTH TO OPERATE THE HOLD-OPEN DEVICE. MAKE SURE YOU KEEP YOUR HANDS AWAY FROM THE FAN COWL DOORS WHEN YOU OPERATE THE HOLD-OPEN DEVICE. IF YOU DO NOT DO THIS, INJURY TO PERSONNEL CAN OCCUR.

(a) Use a SCREWDRIVER - PHILLIPS HEAD to push the pin (43) towards the door locator (45) until the fan cowl doors are released.
(b) Remove the screwdriver from between the fan cowl doors.
(10) Hold the cowl doors together and engage the spigots in their locating holes.
(11) Close the four latches in a sequence from rear to front. You should feel resistance when you close each latch and the latch handle should remain in the fan cowl door slot after you close each latch fully.
(12) Make sure that all the latches stay in the fan cowl slots and are aligned with the bottom of the adjacent cowl surface.
(13) If you find any latch not aligned at Step (13), open the latches and do the closing Step (12) again.
(14) Lock of the latches

CAUTION: DO NOT USE TOOLS ON THE KEY AND FLAG ASSEMBLY. OPERATE THE KEY BY HAND ONLY. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE KEY AND FLAG ASSEMBLY OR TO THE LATCH CAN OCCUR.

CAUTION: DO NOT APPLY TOO MUCH FORCE TO TURN THE KEY IN THE LATCH. DAMAGE TO THE KEY AND FLAG ASSEMBLY OR TO THE LATCH CAN OCCUR.

(a) Push and turn the key to lock latch No 1, the latch (19) and latch (21) with the key and flag assembly HA2273-1 KEY AND TETHERED FLAG (20).
(15) Stowing of the key and flag assembly

CAUTION: DO NOT USE A KEY WITHOUT FLAG TO OPERATE THE FAN COWL DOOR. DO NOT STOW A KEY WITHOUT FLAG IN THE COCKPIT. WHEN YOU USE AND STOW THE KEY, MAKE SURE THAT IT HAS A FLAG ATTACHED TO IT. IF THE FLAG IS MISSING OR DAMAGED, IT MUST BE REPLACED BEFORE THE KEY CAN BE USED OR STOWED AGAIN.

(a) Return key and flag assembly (20) to the allocated secure location in the cockpit.

NOTE: The key and flag assembly must always stay with the latch unless the latch is fully locked and the key is in place in the cockpit.

(16) Make sure the Gearbox Outlet Breather Duct (GBOD) aligns with the gearbox breather outlet vent on the RH cowl door. If it does not align, loosen the GBOD fasteners, align the GBOD with the vent, and torque the fasteners (Ref. AMM TASK 72-61-49-400-010) or (Ref. AMM TASK 72-61-49-400-010).

5. Close-up
Subtask 71-13-00-942-057-A ** ON A/C NOT FOR ALL

A. Remove the WARNING NOTICE(S).

Subtask 71-13-00-970-061-A ** ON A/C NOT FOR ALL

B. Make a record in the aircraft logbook that the fan cowl doors have been closed.

[Rev.10 from 2021] 2026.04.01 04:45:07 UTC