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79-21-09
ALL ú ú N01 Page 405 ú Feb 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
31. WASHER (18 LOCATIONS)
30. NUT
(18 LOCATIONS)
1. ENGINE
AIR/OIL HEAT
EXCHANGER
33.
PACKING
34.
ADAPTER
36. ADAPTER
42. RETURN TUBE
PLATE 3
BOLT 3
H
1 NOT INSTALLED ON ALL AIRPLANES
3 ENGINES POST-PW-SB 79-50
31. WASHER
(18 LOCATIONS)
32. BOLT
(18 LOCATIONS)
18. ENGINE AIR/OIL HEAT EXCHANGER
BOLT 1 1 CLAMP 1
45. BRACKET BOLT EXCHANGE
3
VALVE
SEE I
HARNESS BRACKET 3
35. PACKING
35.
PACKING
36.
ADAPTER
40.
DRAIN TUBE
41.
SUPPLY TUBE
37. CLAMP
PLATE 38. BOLT 3
39. NUT
3
L-A2946
Engine Air/Oil Heat Exchanger and Valve Installation
Figure 401 (Sheet 5)
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79-21-09
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B50514
CLAMP
40. VALVE SERVO FUEL DRAIN TUBE (CR09)
BOLT
CLAMP BOLT
41. VALVE SERVO
FUEL SUPPLY
TUBE (CP08)
BOLT
36. ADAPTER
PACKING (LARGER) 35. PACKING33.
ADAPTER (SMALLER) 34.
42. TUBE (CR08) FUEL RETURN VALVE SERVO
I 3
L-A6821 (0899) PWV
Engine Air/Oil Heat Exchanger and Valve Installation Figure 401 (Sheet 6)
L01410
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 864-005-N00
(4)
For the applicable engine, open these circuit breakers and install the DO-NOT-CLOSE tags:
(a)
P6 Main Power Distribution Panel
1) 6G1 FUEL SHUTOFF VALVE ENG 1
2) 6G2 FUEL SHUTOFF VALVE ENG 2
3) 6G3 FUEL SHUTOFF VALVE ENG 3
4) 6G4 FUEL SHUTOFF VALVE ENG 4
5) 6G15 SCU ALT PWR ENG 1
6) 6G23 ENG SCU 1
7) 6G16 SCU ALT PWR ENG 2
8) 6G24 ENG SCU 2
9) 6G17 SCU ALT PWR ENG 3
10) 6G25 ENG SCU 3
11) 6G18 SCU ALT PWR ENG 4
12) 6G26 ENG SCU 4
S 014-079-N00
(5) Open the left fan cowl panel (AMM 71-11-04/201).
S 044-081-N00
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(6)
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).
S 014-080-N00
(7)
Open the left core cowl panel (AMM 71-11-06/201).
S 014-082-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(8)
Open the left thrust reverser (AMM 78-31-00/201).
(9)
Remove the fan exit liner at the No. 6 position (AMM 72-34-03/401).
S 034-008-N00
(10)
Disconnect the EEC electrical connector (25) from the cable connector for the valve.
S 014-007-N00
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