Removal of the Drains Mast [IAE]

TASK 71-71-42-000-010-A
Removal of the Drains Mast

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.

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	COVER - BLANKING
No specific	1	SCRAPER - NON METALLIC
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-076)	Methyl Ethyl Ketone, Technical grade
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

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

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
Drain Mast

3. Job Set-up
Subtask 71-71-42-941-052-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 71-71-42-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 71-71-42-020-053-A ** ON A/C NOT FOR ALL

A. Disconnect the Drain Tubes
(1) Cut and discard the wire that safeties the nine drain tubes.
(2) Disconnect the drain tubes from the collector plate assembly (5).

Subtask 71-71-42-020-051-B ** ON A/C NOT FOR ALL

B. Remove the Drains Mast
(1) Remove the four bolts (3) which attach the drains mast (4) and the collector plate assembly (5) to the two brackets (1) and (2).
(2) Remove the drains mast (4) from the collector plate assembly (5) with the use of a SCRAPER - NON METALLIC.
(3) Remove the collector plate assembly (5) from the engine.
(4) Remove the old jointing compound from the mating surfaces on the drains mast (4) and the mating surfaces on the collector plate (5) with the use a SCRAPER - NON METALLIC and a clean lint-free cloth Textile-Lint free Cotton - (Material No.14SBA1) made moist with V01-076Methyl Ethyl Ketone, Technical grade. Remove all traces of old jointing compound.

Subtask 71-71-42-620-050-A ** ON A/C NOT FOR ALL

C. Put the applicable COVER - BLANKING on all the openings.

[Rev.10 from 2021] 2026.04.01 12:56:05 UTC