Installation of the Heat Exchanger Drain Tube [CFMI]

TASK 71-73-49-400-045-A
Installation of the Heat Exchanger Drain Tube

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
No specific	Torque wrench: range to between 250 and 200 lbf.in (2.83 and 2.26 m.daN )

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 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
Tubes - Oil, Hydraulic and Water Drain ** ON A/C NOT FOR ALL
Tubes - Oil, Hydraulic and Water Drain ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 71-73-49-860-070-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 71-73-49-010-109-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 71-73-49-420-075-A ** ON A/C NOT FOR ALL

A. Installation of the Heat Exchanger Drain-Tube.
(1) Remove the protective covers from the tubes and tube fittings.
(2) Connect the heat exchanger tube (75) to the heat exchanger . Do not torque the coupling at this time.
(3) Attach the heat exchanger tube (75) to the tube (40) with the clamp (5), the screw (10), the washer (15), and the nut (20).
(4) Attach the heat exchanger tube (75) to the fuel pump bracket with the clamp (5), the screw (10), the washer (15), and the nut (20).

PRE SB RA32071-13 and SB RA32071-14

(5) Connect the heat exchanger tube (75) to the manifold module. Do not torque the coupling at this time.

POST SB RA32071-13 and PRE SB RA32071-14

(6) Connect the heat exchanger tube (75) to the manifold module. Do not torque the coupling at this time.
(7) Connect the tube (55) to the heat exchanger tube (75). Do not torque the coupling at this time.

POST SB RA32071-14

(8) Connect the heat exchanger tube (75) to the manifold module. Do not torque the coupling at this time.
(9) Connect the tubes (55) and (80) to the heat exchanger tube (75). Do not torque the couplings at this time.

END SB RA32071-13 and SB RA32071-14

(10) Make sure that the heat exchanger tube (75) is aligned correctly on the engine.
(11) TORQUE the nuts (20) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

.
(12) TORQUE all the couplings to between 250 and 200 lbf.in (2.83 and 2.26 m.daN )

5. Close-up
Subtask 71-73-49-410-078-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) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:55:10 UTC