Air Flow Check of the AGB/TGB Oil Supply Circuit [CFMB]

TASK 72-00-00-820-005-A
Air Flow Check of the AGB/TGB 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 53 and 47 lbf.in (0.60 and 0.53 m.daN )
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.CP2101)	graphite grease

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 71-00-00-710-006-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
TASK 72-63-00-000-003-A	Removal of the Accessory Gearbox Assembly
TASK 72-63-00-400-003-A	Installation of the Accessory Gearbox Assembly
Air Flow Check of the AGB/TGB Oil Supply Circuit

3. Job Set-up
Subtask 72-00-00-941-107-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 72-00-00-010-149-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 72-00-00-280-071-A ** ON A/C NOT FOR ALL

A. AGB/TGB 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) Remove bolt (50), outer spring clip (20), inner spring clip (40), and plastic bushings (30), which attach the AGB/TGB oil supply tube (10) to the AGB bracket.
(2) Put a CONTAINER 3 L(3/4 USGAL) under the junctions of the oil supply tube (10) to the AGB and to the lubrication unit.
(3) Disconnect the oil supply tube.

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 tube (10) from the nipples of the AGB and lubrication unit.
(4) Connect the test rig, equipped with 856A3267 ADAPTER, TEST RIG - AIR FLOW CHECK (856A3267G02), to the AGB nipple.
(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 the AGB/TGB oil supply circuit (Ref. AMM TASK 71-00-00-820-002).
(7) If the measured flow rate is not within the limits, replace the accessory gearbox module (Ref. AMM TASK 72-63-00-000-003) and (Ref. AMM TASK 72-63-00-400-003).
(8) Disconnect the test rig from the AGB nipple.
(9) Connect the AGB/TGB oil supply tube (10) to the AGB and lubrication unit nipples. Tighten by hand.
(10) Lubricate the threads of bolt (50) with graphite grease (Material No.CP2101) .
(11) Attach the AGB/TGB oil supply tube (10) to AGB bracket with plastic bushings (30), inner spring clip (40), outer spring clip (20) and bolt (50).
(12) Make sure that the EGB/TGB oil supply tube (10) is not strained.
(13) TORQUE the bolt (50) to between 53 and 47 lbf.in (0.60 and 0.53 m.daN )

.
(14) TORQUE the union nuts to between 550 and 450 lbf.in (6.22 and 5.09 m.daN )

Subtask 72-00-00-710-060-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 72-00-00-610-054-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 72-00-00-410-148-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 02:40:26 UTC