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

TASK 71-13-00-010-011-A
Opening of the Fan Cowls with One or No Hold Open Rods Attached 437AL(447AL),438AR(448AR)

WARNING: MAKE SURE THAT THE LANDING GEAR GROUND SAFETIES AND THE WHEEL CHOCKS ARE IN POSITION. MOVEMENT OF THE AIRCRAFT CAN BE DANGEROUS.

WARNING: DO NOT OPEN THE FAN COWL(S) WHEN THE WIND SPEED IS 60 MPH (96 KM/H) OR MORE. INJURY AND/OR DAMAGE TO THE ENGINE CAN OCCUR IF THE WIND MOVES THE FAN COWL(S).

WARNING: BE CAREFUL IF YOU OPEN THE FAN COWL(S) WHEN THE WIND SPEED IS 8 MPH (12 KM/H) OR MORE. INJURY AND/OR DAMAGE TO THE ENGINE CAN OCCUR IF THE WIND MOVES THE FAN COWL(S).

WARNING: MAKE SURE THAT THE HOLD-OPEN RODS (IF INSTALLED) OF THE COWL DOORS ARE IN THE EXTENDED POSITION AND ARE ATTACHED CORRECTLY. IF NOT, THE COWL DOORS CAN CLOSE ACCIDENTALLY.

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: 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.

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: MAKE SURE THAT THE FAN COWL IS NOT OPENED TOO WIDE WHEN YOU ADJUST THE HOIST. IF THE FAN COWLS ARE OPENED TOO WIDE, IT CAN CAUSE TOO MUCH FORCE ON THE HINGE FITTINGS AND CAUSE DAMAGE TO THE COWL DOORS.

CAUTION: MAKE SURE THAT THE FAN COWLS ARE NOT IN AN OPEN POSITION WHEN THE WIND SPEED IS 8 MPH (12 KPH) OR MORE. THE SLING WILL NOT STOP THE COWL FROM OPENING WIDER. IF THE COWLS ARE OPENED TOO WIDE, YOU CAN CAUSE TOO MUCH FORCE ON THE HINGE FITTINGS AND CAUSE DAMAGE TO THE COWL DOORS.

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 open the left or right fan cowl door.

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	WARNING NOTICE(S)
HA2273-1	1	KEY AND TETHERED FLAG

B. Referenced Information

REFERENCE	DESIGNATION
Fan Cowl - Opening/Closing

3. Job Set-up
Subtask 71-13-00-941-068-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 71-13-00-970-059-A ** ON A/C NOT FOR ALL

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

Subtask 71-13-00-410-078-A ** ON A/C NOT FOR ALL

C. Install the Sling
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(2) Remove the caps (55) from the left and right sling points.

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

(3) Attach the sling (IAE IN20404) to the hoist.

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

4. Procedure
Subtask 71-13-00-010-073-B ** ON A/C NOT FOR ALL

A. Opening of the Fan Cowl Doors

CAUTION: MAKE SURE THAT THE AREA AROUND THE FAN COWL(S) IS CLEAR BEFORE THE FAN COWL(S) ARE OPENED. THE COWLS CAN GET DAMAGED IF THEY HIT AN OBJECT.

(1) Get 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.

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) Get the key and flag assembly (20) from the allocated secure location in the cockpit.
(2) Push and turn the key to unlock latch No. 1, latch (19) and latch (21) with the key and flag assembly HA2273-1 KEY AND TETHERED FLAG (20).

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.

(3) Release the four latches (1) and (19) and (14) and (21) in a sequence from front to rear.
(4) Open the two fan cowl doors to approximately 6 in. (152.40 mm).
(5) Make sure that the two fan cowl doors are fully engaged in the hold-open device (44).
(6) Open one of the fan cowl doors.
(7) Hold the fan cowl door open and adjust the hoist to hold the weight.
(8) Release one of the hold-open rods (2), (16) or (17) from its stowing bracket on the fan cowl door.
(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 stowing bracket and release the push-lock collar (31).
(d) Let the release collar (30) and its lock-arm (29) go to their locked positions.
(9) Attach the hold-open rod.
(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) Extend the inner part of the hold-open rod.
(c) Let the release collar (30) and its lock-arm (29) go to their locked positions.
(d) Make sure that the hold-open rod is locked in the extended position.
(e) Put the push-lock (32) into the hole on the attach point bracket.
(f) Make sure that the push-lock assembly engages correctly and locks in the attach point bracket.
(10) Do steps (7) and (9) again for the other hold-open rod.
(11) Do steps (1) thru (10) again for the other fan cowl door.
(12) Do a check of the latch handles.

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

(a) Make sure that all the latch handle hooks are not engaged.

[Rev.10 from 2021] 2026.04.01 02:29:08 UTC