Removal of the Air Intake Cowl [CFMB]

TASK 71-11-00-000-041-A
Removal of the Air Intake Cowl

WARNING: BE CAREFUL DURING THE REMOVAL/INSTALLATION OF THE AIR INTAKE COWL. IT WEIGHS 310 Lb (140.6 kg). IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

CAUTION: THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.

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	COVER - PROTECTION
No specific	AR	PAD - UNIVERSAL ATTACH
No specific	AR	WARNING NOTICE(S)
RSE1112	1	SLING INLET COWL
RSE1116	1	DOLLY-AIR INTAKE COWL

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 30-21-51-000-041-A	Removal of the Engine Air-Intake Anti-ice Valve
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
Air Intake Cowl

3. Job Set-up
Subtask 71-11-00-941-050-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 71-11-00-010-050-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.

4. Procedure
Subtask 71-11-00-020-056-A ** ON A/C NOT FOR ALL

A. Removal of the Hardware
(1) Disconnect the electrical connector (45) for the interphone jack (4001VC-A) from the fan case receptacle.
(2) Install the COVER - PROTECTION on the electrical connector and the receptacle.
(3) Remove the anti-ice valve (40) (Ref. AMM TASK 30-21-51-000-041).
(4) Remove the clamps (30) and the preformed hose (35) that attach the ECU and the ECU cooling air duct.
(5) Remove filler plugs from the hoist points on the air intake cowl. Keep the plugs for the installation after the air intake cowl is removed.

Subtask 71-11-00-480-050-A ** ON A/C NOT FOR ALL

B. Installation of the Tooling
(1) Install the PAD - UNIVERSAL ATTACH (20) in the hoist points of the air intake cowl (25).
(2) Attach the RSE1112 SLING INLET COWL (15) to the universal attach pads (20).
(3) Lift the sling until it supports the air intake cowl (25) weight.

Subtask 71-11-00-020-050-A ** ON A/C NOT FOR ALL

C. Disengagement of the Air Intake Cowl
(1) Remove the bolts (50), washers (5) and (55), spacers (60), and nuts (10) that attach the air intake cowl (25) to the engine flange.
(2) Pull the air intake cowl (25) forward to disengage the index pin from the engine flange.

Subtask 71-11-00-480-056-A ** ON A/C NOT FOR ALL

D. Installation of the Air Intake Cowl on the Dolly
(1) Put the air intake cowl (25) on the RSE1116 DOLLY-AIR INTAKE COWL.
(2) Attach the air intake cowl to the dolly with the bolts (50), washers (5) and (55), spacers (60), and the nuts (10).

Subtask 71-11-00-080-050-A ** ON A/C NOT FOR ALL

E. Remove the RSE1112 SLING INLET COWL (15) and the universal attach pads (20) from the air intake cowl (25).

Subtask 71-11-00-420-056-A ** ON A/C NOT FOR ALL

F. Installation of the Filler Plugs
(1) Install the filler plugs on the hoist points of the air intake cowl (25).
(2) Put COVER - PROTECTION on the preformed hose, the swirl nozzle duct assembly, the ECU, and the ECU cooling air duct.

[Rev.10 from 2021] 2026.04.02 06:32:14 UTC