Installation of the Jet Adaptor Assembly

TASK 28-21-53-400-003-A
Installation of the Jet Adaptor Assembly

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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

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	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	BRUSH - BRISTLED, SOFT
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(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.14QEB1)	Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
575DB, 675DB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	O-RING	AIPC 28-21-53-01-020
2	O-RING	AIPC 28-21-53-01-030

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 27-50-00-866-008-A	Extension of the Flaps on the Ground
TASK 27-50-00-866-008-A-01	Extension of the Flaps/Slats on the Ground
TASK 27-50-00-866-009-A	Retraction of the Flaps on the Ground
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 28-00-00-910-001-A	Fuel Safety Procedures
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 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
Jet Adaptor - Inspection
Jet Adaptor - Wing Tank
Jet Adaptor - Center Tank ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-21-53-941-060-A ** ON A/C NOT FOR ALL

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
(2) Make sure that the SAFETY BARRIER(S) are in position.
(3) Make sure that the WARNING NOTICE(S) are in the correct position:
(a) For the wing tank, on the slat/flap control lever to tell persons not to operate the flight control surfaces.
(b) For the center tank, on the applicable access panel 195BB(196BB) to tell persons not to operate the MLG doors.

Subtask 28-21-53-941-060-C ** ON A/C NOT FOR ALL

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

Subtask 28-21-53-865-058-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	FUEL/CTR TK/PUMP2 SPLY	30QA	P26
121VU	FUEL/CTR TK/PUMP1 SPLY	29QA	P23
** 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 28-21-53-860-052-A ** ON A/C NOT FOR ALL

C. 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) For the wing tank jet adaptor assembly:

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(a) Make sure that the flaps are fully extended (Ref. AMM TASK 27-50-00-866-008).
(b) Make sure that the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE is below the applicable access panel 575DB(675DB).
(c) Make sure that the applicable access panel 575DB(675DB) is removed.
(4) For the center tank jet adaptor assembly:

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.

(a) Make sure that the applicable MLG door is open 734(744) (Ref. AMM TASK 32-12-00-010-001).
(b) Make sure that the 460005835 SLEEVE - GROUND LOCK is on the applicable MLG door actuator.
(c) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is below the applicable zone 147(148).

Subtask 28-21-53-860-052-C ** ON A/C NOT FOR ALL

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

Subtask 28-21-53-210-060-A ** ON A/C NOT FOR ALL

D. Jet Adaptor Inspection
(1) Clean the jet adaptor assembly (4) with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Check that the jet adaptor assembly (4) is not damaged and that the jet (5) is not blocked.
(3) If the jet (5) is blocked do the steps that follow:

Jet Adaptor - Inspection ** ON A/C NOT FOR ALL

(a) Remove the trapwire:
1 Make the ends of the trapwire straight.
2 Turn the jet adaptor (20) until the slot in the jet adaptor (20) and the blind hole in the jet (5) are aligned.
3 Bend one end of the trapwire and engage it in the blind hole.
4 Turn the jet (5). At the same time pull on the free end of the trapwire to help its removal from the groove in the jet (5).
5 Discard the trapwire.
(b) Pull the jet (5), with the O-ring (15), from the jet adaptor (20) and remove the:

spider (16)
spring (17)
valve (18)
rubber washer (19).

(c) Use a BRUSH - BRISTLED, SOFT and carefully remove the blockage from the jet (5). Make sure you do not damage the jet (5).
(d) Clean all the parts with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(e) Install the rubber washer (19), the valve (18), the spring (17) and the spider (16) in the jet adaptor (20).
(f) Push the jet (5), with O-ring (15), into the jet adaptor (20).
(g) Install the new trapwire 14QEB1Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -:
1 Bend one end of the trapwire.
2 Align the slot in the adaptor (20) with the blind hole in the jet (5). Engage the bent end of the trapwire in the blind hole.
3 Turn the jet (5) to get the trapwire into the groove in the jet (5).
4 Continue to turn the jet (5) until the trapwire comes into view. Remove the bent end of the trapwire from the blind hole.
5 Cut the ends of the trapwire and bend them against the sides of the slot in the adaptor (20).

Subtask 28-21-53-420-056-A ** ON A/C NOT FOR ALL

E. Preparation for Installation
(1) Clean the component interfaces and the adjacent areas 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 28-21-53-01-020 O-RING (3) and the new AIPC 28-21-53-01-030 O-RING (2) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .

4. Procedure
Subtask 28-21-53-420-053-A ** ON A/C NOT FOR ALL

A. Installation of the Jet Adaptor Assembly in the Wing Tank and the Center Tank

Jet Adaptor - Wing Tank ** ON A/C NOT FOR ALL

Jet Adaptor - Center Tank ** ON A/C NOT FOR ALL

(1) Install the new AIPC 28-21-53-01-020 O-RING (3) and the new AIPC 28-21-53-01-030 O-RING (2) on the jet adaptor assembly (4).
(2) Install the jet adaptor assembly (4) in the jet pump (1) and safety with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

Subtask 28-21-53-420-053-C ** ON A/C NOT FOR ALL

A. Installation of the Jet Adaptor Assembly in the Wing Tank

Jet Adaptor - Wing Tank ** ON A/C NOT FOR ALL

Subtask 28-21-53-650-057-A ** ON A/C NOT FOR ALL

B. Fuel Configuration
(1) Refuel the applicable fuel tank (Ref. AMM TASK 12-11-28-650-003).

Subtask 28-21-53-790-052-A ** ON A/C NOT FOR ALL

C. Leak Test
(1) Examine the interface of the jet adaptor (4) and the jet pump (1) for fuel leaks.

5. Close-up
Subtask 28-21-53-410-054-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) For the wing tank jet adaptor assembly:
(a) Install the applicable access panel 575DB 675DB.
(b) Remove the access platform(s).
(c) Fully retract the flaps (Ref. AMM TASK 27-50-00-866-009).
(3) For the center tank jet adaptor assembly:
(a) Remove the access platform(s).
(b) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).

Subtask 28-21-53-410-054-C ** ON A/C NOT FOR ALL

Subtask 28-21-53-865-059-A ** ON A/C NOT FOR ALL

B. 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/CTR TK/PUMP2 SPLY	30QA	P26
121VU	FUEL/CTR TK/PUMP1 SPLY	29QA	P23
** 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 28-21-53-650-059-A ** ON A/C NOT FOR ALL

C. 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 28-21-53-942-054-A ** ON A/C NOT FOR ALL

D. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(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 06:17:29 UTC