Installation of the Check Valves

TASK 28-16-42-400-002-A
Installation of the Check Valves

WARNING: MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 222QM ** ON A/C NOT FOR ALL
FIN: 223QM ** ON A/C NOT FOR ALL
FIN: 224QM ** ON A/C NOT FOR ALL
FIN: 225QM ** ON A/C NOT FOR ALL

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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.01ABA1)	Turbine Fuel-- Kerosene -
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [222QM] (CHECK VALVE)
FOR [224QM] (CHECK VALVE)
540AB, 540BZ
FOR [223QM] (CHECK VALVE)
FOR [225QM] (CHECK VALVE)
640AB, 640BZ

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	O-RING	AIPC 28-16-05-18-190

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-21-00-710-002-A	Operational Check of Wing Tank Pump Pressure Sense Line Check Valves
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
Check Valve - Location and Detail
FOR [222QM] (CHECK VALVE)
FOR [224QM] (CHECK VALVE)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
TASK 57-27-12-000-002-A	Removal of the Rib 2 Access Panel 540AZ(640AZ) or 540BZ(640BZ)
TASK 57-27-12-400-002-A	Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)
FOR [223QM] (CHECK VALVE)
FOR [225QM] (CHECK VALVE)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
TASK 57-27-12-000-002-A	Removal of the Rib 2 Access Panel 540AZ(640AZ) or 540BZ(640BZ)
TASK 57-27-12-400-002-A	Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)

3. Job Set-up
Subtask 28-16-42-941-057-A ** ON A/C NOT FOR ALL

A. Safety Precautions

WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

(1) You must obey the fuel safety procedures when you do work in a fuel tank (Ref. AMM TASK 28-10-00-910-001).
(2) Make sure that the SAFETY BARRIER(S) are in position.

Subtask 28-16-42-860-054-A ** ON A/C NOT FOR ALL

Subtask 28-16-42-860-054-C ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the applicable fuel tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the applicable zone 540 (640).
(4) Make sure that the applicable access panels are removed as follow:
(a) FOR [222QM] (CHECK VALVE), [224QM] (CHECK VALVE)
Remove 540AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(b) FOR [223QM] (CHECK VALVE), [225QM] (CHECK VALVE)
Remove 640AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(5) Make sure that the applicable RIB2 access panels are removed as follow:
(a) FOR [222QM] (CHECK VALVE), [224QM] (CHECK VALVE)
Remove 540BZ (Ref. AMM TASK 57-27-12-000-002).
(b) FOR [223QM] (CHECK VALVE), [225QM] (CHECK VALVE)
Remove 640BZ (Ref. AMM TASK 57-27-12-000-002).

4. Procedure
Subtask 28-16-42-420-053-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interfaces and the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Lubricate the new AIPC 28-16-05-18-190 O-RING (1) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .

Subtask 28-16-42-420-051-A ** ON A/C NOT FOR ALL

B. Installation of the Check Valve 222QM(223QM), 224QM(225QM)
(1) Install the new O-ring (1) on the check-valve (2).
(2) Remove the blanking plugs from the disconnected line ends.
(3) Install the check-valve (2).
(4) Connect the pipe (3) to the check-valve (2).

Subtask 28-16-42-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) and carefully close the applicable RIB 2 surge door:
(a) FOR [222QM] (CHECK VALVE), [224QM] (CHECK VALVE)
close 540BZ
(b) FOR [223QM] (CHECK VALVE), [225QM] (CHECK VALVE)
close 640BZ.
(3) Install the applicable wing access panel (Ref. AMM TASK 57-27-11-400-001):
(a) FOR [222QM] (CHECK VALVE), [224QM] (CHECK VALVE)
install 540AB.
(b) FOR [223QM] (CHECK VALVE), [225QM] (CHECK VALVE)
install 640AB.

Subtask 28-16-42-410-051-C ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable RIB2 access panels that follow:
(a) FOR [222QM] (CHECK VALVE), [224QM] (CHECK VALVE)
Install 540BZ (Ref. AMM TASK 57-27-12-400-002).
(b) FOR [223QM] (CHECK VALVE), [225QM] (CHECK VALVE)
Install 640BZ (Ref. AMM TASK 57-27-12-400-002).
(3) Install the applicable access panels that follow:
(a) FOR [222QM] (CHECK VALVE), [224QM] (CHECK VALVE)
Install 540AB (Ref. AMM TASK 57-27-11-400-001).
(b) FOR [223QM] (CHECK VALVE), [225QM] (CHECK VALVE)
Install 640AB (Ref. AMM TASK 57-27-11-400-001).

Subtask 28-16-42-865-054-A ** ON A/C NOT FOR ALL

D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	FUEL/L WING TK/PUMP2 SPLY	7QA	N26
121VU	FUEL/L WING TK/PUMP1 SPLY	1QA	N23
121VU	FUEL/R WING TK/PUMP2 SPLY	8QA	Q26
121VU	FUEL/R WING TK/PUMP1 SPLY	2QA	Q23
123VU	L WING TK/PUMP 1/STBY SPLY	11QA	AD12
123VU	R WING TK/PUMP 1/STBY SPLY	12QA	AE12

Subtask 28-16-42-710-051-A ** ON A/C NOT FOR ALL

E. Operational test
(1) Do the operational test of the check valves 222QM(223QM) and 224QM(225QM) (Ref. AMM TASK 28-21-00-710-002).

5. Close-up
Subtask 28-16-42-650-053-A ** ON A/C NOT FOR ALL

A. Fuel Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).

Subtask 28-16-42-942-052-A ** ON A/C NOT FOR ALL

B. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:17:17 UTC