Detailed Visual Inspection of the Inlet Cowl Forward Backskin through the Anti-ice Vent Panel [CFMI]

TASK 71-11-00-220-001-A
Detailed Visual Inspection of the Inlet Cowl Forward Backskin through the Anti-ice Vent Panel

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 1M(3 FT)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-11-00-000-043-A	Removal of the Anti-Ice Vent Panel
TASK 71-11-00-400-044-A	Installation of the Anti-Ice Vent Panel
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
Air Intake Cowl

3. Job Set-up
Subtask 71-11-00-941-061-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(2) On the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(3) On the ENG section of the 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 71-11-00-010-060-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.
(3) Remove the anti-ice vent panel (10) (Ref. AMM TASK 71-11-00-000-043).

4. Procedure
Subtask 71-11-00-220-050-A ** ON A/C NOT FOR ALL

A. Do a detailed visual inspection of the inlet cowl inner barrel forward backskin, that you can see through the anti-ice vent opening, using a flashlight and an inspection mirror:

Air Intake Cowl ** ON A/C NOT FOR ALL

For maximum serviceable limits for corrosion/disbond damage, please refer to Nacelle SRM (54-10-00) Repair 28 (Collins Cage Code 51563).

5. Close-up
Subtask 71-11-00-410-058-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the anti-ice vent panel (10) (Ref. AMM TASK 71-11-00-400-044).
(3) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:31:54 UTC