Installation of the Clack Valve

TASK 28-11-42-400-002-A
Installation of the Clack Valve

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

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.

FIN: 214QM ** ON A/C NOT FOR ALL
FIN: 215QM ** ON A/C NOT FOR ALL
FIN: 216QM ** ON A/C NOT FOR ALL
FIN: 217QM ** 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 4M (13 FT)
No specific	AR	SAFETY BARRIER(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06ABA1)	Polysulfide 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
540RB, 550AB, 640RB, 650AB

D. 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 28-12-47-000-001-A	Removal of the NACA Vent Intake
TASK 28-12-47-400-001-A	Installation of the NACA Vent Intake
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 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
Clack Valve

3. Job Set-up
Subtask 28-11-42-941-054-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 28-11-42-860-051-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 28-25-00-650-003).
(3) Make sure the the ACCESS PLATFORM 4M (13 FT) is below the applicable access panel 540RB(640RB).
(4) Make sure that the applicable access panels are removed:

540RB(640RB) (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-10-00-910-002)
550AB(650AB) (Ref. AMM TASK 28-12-47-000-001) and (Ref. AMM TASK 28-10-00-910-002).

4. Procedure
Subtask 28-11-42-420-054-A ** 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) 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.

Subtask 28-11-42-420-052-A ** ON A/C NOT FOR ALL

B. Installation of the Clack Valve
(1) Apply a thin layer of Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) below the heads and around the shanks of the bolts (1).

NOTE: Make sure that no sealant touches the interface of the clack valve (2) and the rib.

(2) Install the clack valve (2) with the bolts (1). Tighten the bolts (1).
(3) Apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the two ends of the bolts (1).

Subtask 28-11-42-710-051-A ** ON A/C NOT FOR ALL

C. Operational Test of the Clack Valve
(1) Make sure that the clack valve (2) can open and close freely.
(2) Make sure that the flap is flat against its seat when the clack valve (2) is closed.

5. Close-up
Subtask 28-11-42-410-052-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 panel (Ref. AMM TASK 57-27-11-400-002):
(a) For 214QM and 216QM, install 540RB
(b) For 215QM and 217QM, install 640RB.
(3) Install the applicable NACA vent intake (Ref. AMM TASK 28-12-47-400-001):
(a) For 214QM and 216QM, install 550AB
(b) For 215QM and 217QM, install 650AB.

Subtask 28-11-42-650-055-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 28-11-42-942-051-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 06:17:06 UTC