Installation of the Vent Float-Valve

TASK 28-12-43-400-002-A
Installation of the Vent Float-Valve

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: 16QM ** ON A/C NOT FOR ALL
FIN: 17QM ** 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.06HAA1)	Coating Sealant-Fuel Tank Brushable -
(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 [16QM] (VALVE-FLOAT VENT, L WING TK INR)
540JB
FOR [17QM] (VALVE-FLOAT VENT, R WING TK INR)
640JB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
8	O-RING	AIPC 28-12-05-31-220
8	O-RING	AIPC 28-12-85-23-100

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
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 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
Vent Float - Valve 16QM (17QM) ** ON A/C NOT FOR ALL
Vent Float - Valve 16QM (17QM) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-12-43-941-058-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 28-12-43-860-054-A ** 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 28-25-00-650-001).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is below the applicable zone 540(640).
(4) Make sure that the applicable access panels are removed (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-10-00-910-002):
(a) FOR [16QM] (VALVE-FLOAT VENT, L WING TK INR)
540JB
(b) FOR [17QM] (VALVE-FLOAT VENT, R WING TK INR)
640JB.

4. Procedure
Subtask 28-12-43-420-055-C ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Lubricate the new AIPC 28-12-05-31-220 O-RING (8) or AIPC 28-12-85-23-100 O-RING (8) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .

Subtask 28-12-43-420-052-C ** ON A/C NOT FOR ALL

B. Installation of the Vent Float-Valve 16QM(17QM)
(1) Install the new O-ring (8) on the vent float-valve (1).
(2) Remove the blanking cap from the adaptor (7).
(3) Install the vent float-valve (1) on the adaptor (7) with the bolts (6) and the nuts (2).
(4) Install the bonding strap (5) on the vent float-valve (1) with the bolts (3) and washers (4) (Ref. AMM TASK 20-28-00-912-802).
(5) Apply Coating Sealant-Fuel Tank Brushable - (Material No.06HAA1) to the bolts (6) and the nuts (2).

Subtask 28-12-43-710-052-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Make sure that the vent float-valve (1) moves freely.

5. Close-up
Subtask 28-12-43-410-053-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) Install the applicable access panels (Ref. AMM TASK 57-27-11-400-002):
(a) FOR [16QM] (VALVE-FLOAT VENT, L WING TK INR)
install 540JB
(b) FOR [17QM] (VALVE-FLOAT VENT, R WING TK INR)
install 640JB.

Subtask 28-12-43-650-054-A ** ON A/C NOT FOR ALL

B. 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 28-12-43-942-052-A ** ON A/C NOT FOR ALL

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

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