Visual Inspection of the Starter Air Duct (from the Pylon to the Starter Air Valve) [CFML]

TASK 80-12-49-210-801-A
Visual Inspection of the Starter Air Duct (from the Pylon to the Starter Air Valve)

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
This procedure gives the instructions to do an inspection of the starter air duct (1) from the pylon to the starter air valve.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 80-12-49-000-802-A	Removal of the Starter Air Duct (from the Pylon to the Starter Air Valve (SAV))
TASK 80-12-49-400-802-A	Installation of the Starter Air Duct (from the Pylon to the Starter Air Valve (SAV))
Starter Air Duct

3. Job Set-up
Subtask 80-12-49-941-054-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 80-12-49-010-054-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
(2) Put an ACCESS PLATFORM 2M (6 FT) in position.

Subtask 80-12-49-040-050-A

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-809).

4. Procedure
Subtask 80-12-49-210-050-A

A. Visual Inspection of the Starter Air Duct

NOTE: The starter air duct (1) has been divided to three sections A, B and C:

section A from the pylon to upper spherical flex joint,
section B between upper and lower spherical flex joints,
section C from starter air valve orifice to the lower spherical flex joint.

(1) Do the visual inspection of the starter air duct (1) from the pylon to the starter air valve using the following criteria:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
Rigid Tube Sections
1. Cracks	Not serviceable.	If damaged, replace the duct (Ref. AMM TASK 80-12-49-000-802) and (Ref. AMM TASK 80-12-49-400-802).
2. Dents	Dents shall not exceed 10 mm (0.4 in.).	If assembly is beyond serviceable limits, replace duct (Ref. AMM TASK 80-12-49-000-802) and (Ref. AMM TASK 80-12-49-400-802).
3. Nicks, scratches, chafing or scores	Depth must not exceed: For sections A and C: 0.043 mm (0.0017 in.), For section B: 0.035 mm (0.0014 in.).	If assembly is beyond serviceable limits, replace duct (Ref. AMM TASK 80-12-49-000-802) and (Ref. AMM TASK 80-12-49-400-802).
Welded End Fittings
1. Cracks	Not serviceable.	If damaged, replace the duct (Ref. AMM TASK 80-12-49-000-802) and (Ref. AMM TASK 80-12-49-400-802).
2. Nicks, scratches and gouges on non-sealing surfaces	Depth must not exceed 0.13 mm (0.005 in.) after removal of high metal.	If assembly is beyond serviceable limits, replace duct (Ref. AMM TASK 80-12-49-000-802) and (Ref. AMM TASK 80-12-49-400-802).
Weld Joints
1. Cracks in welds not extending into parent metal	Not serviceable.	If damaged, replace the duct (Ref. AMM TASK 80-12-49-000-802) and (Ref. AMM TASK 80-12-49-400-802).
Spherical Flex Joints
1. Nicks, scratches and gouges on outer surface	Depth must not exceed 0.13 mm (0.005 in.) deep after removal of high metal.	If assembly is beyond serviceable limits, replace duct (Ref. AMM TASK 80-12-49-000-802) and (Ref. AMM TASK 80-12-49-400-802).

5. Close-up
Subtask 80-12-49-410-052-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.

Subtask 80-12-49-440-050-A

B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 80-12-49-410-053-A

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:45:39 UTC