Air Flow Check of the Forward Sump Oil Supply Circuit [CFMB]

TASK 72-00-00-820-004-A
Air Flow Check of the Forward Sump Oil Supply 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 3 L(3/4 USGAL)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 275 and 225 lbf.in (3.11 and 2.54 m.daN )
No specific	Torque wrench: range to between 550 and 450 lbf.in (6.22 and 5.09 m.daN )
856A3267	1	ADAPTER, TEST RIG - AIR FLOW CHECK

B. Consumable Materials

REFERENCE	DESIGNATION
(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. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-002-A	Check oil level and replenish Check Pop Out Indicator of EMCD (Electrical Master Chip Detector)
TASK 12-13-79-610-002-A-01	Check oil level and replenish (Pressure Filling)
TASK 71-00-00-000-042-A	Removal of the Power Plant
TASK 71-00-00-000-042-A-01	Removal of the Power Plant with the Engine Positioner TWW 75E (MIAG)
TASK 71-00-00-000-042-A-03	Removal of the Power Plant with Jacxson Tool
TASK 71-00-00-400-042-A	Installation of the Power Plant
TASK 71-00-00-400-042-A-01	Installation of the Power Plant with the Engine Positioner TWW 75E (MIAG)
TASK 71-00-00-400-042-A-03	Installation of the Power Plant with Jacxson Tool
TASK 71-00-00-710-006-B	Minimum Idle Check
TASK 71-00-00-820-002-A	Oil Circuit Air Flow Check
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
Air Flow Check of the Forward Sump Oil Supply Circuit

3. Job Set-up
Subtask 72-00-00-941-106-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 72-00-00-010-148-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 72-00-00-280-070-A ** ON A/C NOT FOR ALL

A. Forward Sump Air Flow Check

WARNING: USE PROTECTIVE GLOVES AND BE CAREFUL WITH OIL SPLASHES WHEN YOU DISCONNECT OIL TUBES. HOT OIL CAN CAUSE DEEP BURNS.

(1) Put a CONTAINER 3 L(3/4 USGAL) under the junction of the oil supply tube (10) and oil supply hose (20).
(2) Cut and remove the lockwire which safeties the union nut of the oil supply hose (20) to the oil supply tube (10).
(3) Disconnect the oil supply hose.

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(a) Disconnect the oil supply hose (20) from the oil supply tube (10).
(4) Connect the test rig equipped with 856A3267 ADAPTER, TEST RIG - AIR FLOW CHECK (856A3267G02), to the oil supply tube (10).
(5) TORQUE the union nut to between 275 and 225 lbf.in (3.11 and 2.54 m.daN )

.
(6) Do the check of the forward sump oil supply circuit (Ref. AMM TASK 71-00-00-820-002).
(7) If the measured flow rate is not within the limits, replace the power plant (Ref. AMM TASK 71-00-00-000-042) and (Ref. AMM TASK 71-00-00-400-042).
(8) Disconnect the test rig from the oil supply tube (10).
(9) Connect the oil supply hose (20) to the oil supply tube (10).
(10) TORQUE the union nut to between 550 and 450 lbf.in (6.22 and 5.09 m.daN )

.
(11) Safety the union nut with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.

Subtask 72-00-00-710-059-A ** ON A/C NOT FOR ALL

B. Do an idle check (Ref. AMM TASK 71-00-00-710-006) and check for leaks.

Subtask 72-00-00-610-053-A ** ON A/C NOT FOR ALL

C. Do a check of the oil level (Ref. AMM TASK 12-13-79-610-002).

5. Close-up
Subtask 72-00-00-410-147-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 02:40:25 UTC