Removal of the Fan Duct Panels [CFMI]

TASK 72-23-00-000-005-A
Removal of the Fan Duct Panels

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
Fan Duct Panel

3. Job Set-up
Subtask 72-23-00-941-057-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 72-23-00-010-054-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT).

Subtask 72-23-00-040-059-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 72-23-00-010-074-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors: (Ref. AMM TASK 78-36-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 72-23-00-020-054-A ** ON A/C NOT FOR ALL

A. Remove the Fan Duct Panels as follows:

CAUTION: DURING REMOVAL OF FAN DUCT PANELS, DO NOT FULLY REMOVE CAPTIVE SCREWS FROM PANEL. THESE SCREWS ARE HELD IN PLACE BY A RETAINING BUSHING ON THE BACK SIDE OF THE PANELS WHICH MAY FALL INTO THE VBV CAVITY IF SCREWS ARE FULLY REMOVED. AFTER REMOVAL OF EACH PANEL, IT MUST BE VERIFIED THAT BUSHINGS ARE STILL WITH PANEL AND NOT IN VBV CAVITY.

(1) Loosen the captive screws (150), and remove the panel (160).
(2) Unscrew and remove the retaining bushings (170) from the screws (150).
(3) Remove the washers (180) from the screws (150).

[Rev.10 from 2021] 2026.04.01 02:38:29 UTC