Draining of the Engine Fuel Circuit [CFMI]

TASK 73-00-00-680-002-A
Draining of the Engine Fuel Circuit

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	CONTAINER 20L (5 USGAL)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil
(Material No.CP8001)	lockwire 0.032 in. (0.8 mm) dia.
(Material No.CP8002)	lockwire 0.032 in. (0.8 mm) dia

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
10	O-RING	AIPC 73-11-10-01-190

E. 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
Location of Drain Plug at the Bottom of Fuel Pump

3. Job Set-up
Subtask 73-00-00-941-050-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 73-00-00-010-050-A ** ON A/C NOT FOR ALL

B. Open the fan cowl doors: (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 73-00-00-680-050-A ** ON A/C NOT FOR ALL

A. Draining of the Engine Fuel Circuit

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

WARNING: USE A CORRECT CONTAINER AND KEEP THE CONTAINER AWAY FROM FLAMES SO THAT FIRES DO NOT OCCUR.

(1) Cut and remove the lockwire from the drain plug (20) located on the fuel pump filter cover.
(2) Put a CONTAINER 20L (5 USGAL) below the fuel pump to catch the fuel which will drain.
(3) Loosen and remove the drain plug (20). Let all the fuel drain into the container.
(4) Remove the O-ring (10) from the drain plug (20).
(5) Lubricate a new AIPC 73-11-10-01-190 O-RING (10) with engine oil (Material No.CP2442) and install on drain plug (20).
(6) Install the drain plug assembly on the fuel pump filter cover and tighten by hand.
(7) TORQUE the drain plug (20) to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )

.
(8) Safety the drain plug (20) to the fuel pump cover with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.

5. Close-up
Subtask 73-00-00-410-050-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)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:55:02 UTC