Removal of the Drain Tubes [IAE]

TASK 71-71-43-000-010-A
Removal of the Drain Tubes

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. Work Zones and Access Panels

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

B. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
Fuel Diverter Unit Drain Tubes
Fuel Metering Unit Drain Tube
Fuel Pump Drain Tube
Oil Tank Scupper Drain Tube.
Hydraulic Pump Drain Tube.
ACOC, Actuator, IDG and Air Starter Drain Tubes
Bifurcation Panel Drain Tubes

3. Job Set-up
Subtask 71-71-43-941-052-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 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 to tell persons not to energize the FADEC 1(2)

Subtask 71-71-43-010-054-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 71-71-43-020-052-A ** ON A/C NOT FOR ALL

A. Remove the fuel diverter drain tubes (1, 2 and 3).

Fuel Diverter Unit Drain Tubes ** ON A/C NOT FOR ALL

(1) Remove the nuts, washers, spacers, bolts, clamps.
(2) Disconnect the drain tube (1, 2, 3) B-nuts from the union on the fuel diverter and drain mast. Remove tubes.

Subtask 71-71-43-020-054-A ** ON A/C NOT FOR ALL

B. Remove fuel metering unit drain tube (4).

Fuel Metering Unit Drain Tube ** ON A/C NOT FOR ALL

(1) Remove the nuts, washers, spacers, bolts, clamps.
(2) Disconnect the drain tube (4) B-nuts from the fuel metering unit and the drain mast. Remove tube.

Subtask 71-71-43-020-055-A ** ON A/C NOT FOR ALL

C. Remove the fuel pump drain tube (5).

Fuel Pump Drain Tube ** ON A/C NOT FOR ALL

(1) Disconnect the drain tube (5) B-nuts from the union on the fuel pump and the drain mast. Remove tube.

Subtask 71-71-43-020-056-A ** ON A/C NOT FOR ALL

D. Remove the oil tank scupper drain tube (6).

Oil Tank Scupper Drain Tube. ** ON A/C NOT FOR ALL

(1) Remove bolts and clamps.
(2) Disconnect drain tube (6) B-nuts from the union on the oil tank scupper and the drain mast. Remove tube.

Subtask 71-71-43-020-057-A ** ON A/C NOT FOR ALL

E. Remove the hydraulic pump drain tube (7).

Hydraulic Pump Drain Tube. ** ON A/C NOT FOR ALL

(1) Remove the nut, washer, bolts and clamps.
(2) Disconnect drain tube (7) B-nuts from the union on the hydraulic pump and the drain mast.

Subtask 71-71-43-020-058-A ** ON A/C NOT FOR ALL

F. Remove the ACOC actuator, IDG and the air starter drain tubes (8, 9, 10 and 11).

ACOC, Actuator, IDG and Air Starter Drain Tubes ** ON A/C NOT FOR ALL

(1) Remove the nut, washer, spacer, bolts, clamps.
(2) Disconnect the drain tubes (8, 9, 10 and 11) B-nuts from the union on the IDG, air starter, ACOC actuator and the drain mast. Remove tubes.

Subtask 71-71-43-020-059-A ** ON A/C NOT FOR ALL

G. Remove the bifurcation panel drain tubes (12 and 13).

Bifurcation Panel Drain Tubes ** ON A/C NOT FOR ALL

(1) Remove the nuts, washers, spacers, bolts, clamp.
(2) Disconnect the drain tubes B-nut from the bifurcation panel fitting tube and the drain mast B-nut. Remove tubes.

Subtask 71-71-43-410-052-A ** ON A/C NOT FOR ALL

H. Put the applicable covers/caps/plugs on all the openings.

[Rev.10 from 2021] 2026.04.01 02:30:59 UTC