W DOC AIRBUS | AMM A320F

Removal of the Fuel Quantity Preselector

TASK 28-42-21-000-001-A
Removal of the Fuel Quantity Preselector

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: 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: OBEY THE FUEL SAFETY PROCEDURES.
ZONE: 190
ZONE: 500
ZONE: 600
FIN: 5QT
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 1M (3 FT)-ADJUSTABLE
No specific
AR
ACCESS PLATFORM 3M (10 FT)
No specific
AR
CAP - BLANKING
No specific
AR
SAFETY BARRIER(S)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
190
BELLY FAIR, AIR CONDITIONING & HYD COMPT
500
LEFT WING
600
RIGHT WING
622KB
192MB
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 28-00-00-910-001-A
Fuel Safety Procedures
F Fuel Quantity Preselector 5QT ** ON A/C NOT FOR ALL
F Fuel Quantity Preselector 5QT ** ON A/C NOT FOR ALL
F Fuel Quantity Preselector 5QT ** ON A/C NOT FOR ALL
F Fuel Quantity Preselector 5QT ** ON A/C NOT FOR ALL
F Fuel Quantity Preselector 5QT ** ON A/C NOT FOR ALL
F Fuel Quantity Preselector 5QT ** ON A/C NOT FOR ALL
F Fuel Quantity Preselector 5QT ** ON A/C NOT FOR ALL
F Fuel Quantity Preselector 5QT ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 28-42-21-941-052-A
A. Safety Precautions
   (1) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
   (2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
Subtask 28-42-21-865-050-A
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUFUEL/FQI/CHAN/11QTA13
** ON A/C NOT FOR ALL
121VUFUEL/FQI/CHANNEL/1 AND 28QTL26
** ON A/C ALL
121VUFUEL/FQI/CHAN/22QTM27
** ON A/C NOT FOR ALL
121VUFUEL/FQI/CHANNEL/1 AND 28QTL25
Subtask 28-42-21-010-050-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) If necessary, put ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position below access panel 192MB.
   (2) Open access panel 192MB.
NOTE: If operating in battery power, do not keep the door open longer than necessary because the battery can discharge.
Subtask 28-42-21-010-050-B ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT) in position below zone 622.
   (2) Open access panel 622KB.
NOTE: If operating in battery power, do not keep the door open longer than necessary because the battery can discharge.
4. Procedure
Subtask 28-42-21-020-053-A
A. Removal of Fuel Quantity Preselector 5QT
   (1) Release the quick-release fasteners (3).
CAUTION: DO NOT PULL THE PRESELECTOR TOO FAR AND DO NOT LET IT HANG ON THE ELECTRICAL CABLE. THIS WILL PREVENT DAMAGE TO THE ELECTRICAL CABLE.
   (2) Pull the preselector (2) from the mounting frame back-plate.
CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE COMPONENT DURING THE PROCEDURE. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO COMPONENT.
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
   (3) Disconnect the electrical plug (1).
   (4) Remove the preselector (2).
   (5) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
[Rev.10 from 2021] 2026.04.02 06:18:07 UTC
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