(2)
Access Panel
415 Left Thrust Reverser Half - Engine 1
425 Left Thrust Reverser Half - Engine 2
435 Left Thrust Reverser Half - Engine 3
445 Left Thrust Reverser Half - Engine 4
C.
Prepare to Remove the Pressure Controller
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-003
(2)
Open the AIR SUPPLY CONT circuit breaker on the Main Power Distribution Panel, P6, for the applicable engine:
(a)
6H32 AIR SUPPLY CONT 1 PWR
(b)
6H33 AIR SUPPLY CONT 2 PWR
S 864-002
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MAINTENANCE MANUAL
SEE A
1. REGULATED
PRESSURE TUBE
2. ACTUATOR PRESSURE
TUBE
A A B TUBE 3. SUPPLY PRESSURE
CONTROLLER SEE 5. PRESSURE B B
JUMPER 4. BONDING
FWD
A
Figure 401 (Sheet 1) Pressure Controller Installation
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747-400
MAINTENANCE MANUAL
10. NUT
4. BONDING
JUMPER
HIGH PRESSURE
CONTROLLER (REF) 11. WASHER
MOUNTING
BRACKET
4. BONDING
REGULATED C C JUMPER GROUND STRAP 8. BOLT
PRESSURE
PORT ACTUATOR PRESSURE
PORT
6. BOLT
7. WASHER C
(4 LOCATIONS)
SUPPLY PRESSURE
9. ELECTRICAL PORT
CONNECTOR 5. PRESSURE
CONTROLLER
8. BOLT
12. ELBOW
SEE C
VIEW LOOKING AFT
B
13. JAMNUT
14. 0-RING
A-A
15. SWIVEL ELBOW 15. SWIVEL ELBOW
16. REDUCER 18. UNION
17. 0-RING 14. 0-RING
B-B C-C
Pressure Controller Installation
Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
(c)
6H34 AIR SUPPLY CONT 3 PWR
(d)
6H35 AIR SUPPLY CONT 4 PWR
S 864-036 WARNING: YOU MUST RELEASE THE PRESSURE IN THE PNEUMATIC DUCT BEFORE YOU
_______ REMOVE A PNEUMATIC SYSTEM COMPONENT. IF YOU DO NOT RELEASE THE PRESSURE FIRST, IT CAN CAUSE INJURIES TO PERSONS.
(3) Release the pressure in the pneumatic system (AMM 36-00-00/201).
S 044-042 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE THRUST REVERSER TO
_______ PREVENT THE OPERATION OF THE THRUST REVERSER. ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(4)
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).
S 014-043
(5)
Open the left fan cowl panel (AMM 71-11-04/201). S 014-045
(6)
Open the left core cowl panel (AMM 71-11-06/201).
S 014-044 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS WHEN YOU OPEN THE THRUST REVERSERS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
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