2
Engine Spar Valve Adapter
Figure 401 (Sheet 1)
L11347
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28-22-09
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A
747-400
MAINTENANCE MANUAL
ADAPTER SHAFT
6. O-RING
ESEE INDEX MARKS
7. BOLT (4 LOCATIONS)
(4 LOCATIONS) 8. WASHER
5. SCREW SURFACE FAYING 2 FRONT SPAR UP
2. INDEX PLATE (3 LOCATIONS) 3. WASHER (2 LOCATIONS) 4. SCREW PLATE 1. ADAPTER
NO. 1 AND NO. 4 ADAPTER PLATE
C
NOTE: THE NO. 1 AND NO. 4 ENGINE SPAR VALVES ARE INSTALLED ROTATED 180` COMPARED TO THE NO. 2 AND NO. 3 ENGINE SPAR VALVES.
Engine Spar Valve Adapter
Figure 401 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
L11329
A
747-400
MAINTENANCE MANUAL
4. SCREW
3. WASHER (2 LOCATIONS) (3 LOCATIONS)
2. INDEX PLATE
1. ADAPTER PLATE
FAYING SURFACE 2 5. SCREW
FRONT
SPAR
8. WASHER
(4 LOCATIONS)
7. BOLT (4 LOCATIONS)
INDEX MARKS
UP SEE E
6. O-RING
ADAPTER
SHAFT
NO. 2 AND NO. 3 ADAPTER PLATE D VALVE BODY
INDEX MARKS ON THE VALVE BODY
ADAPTER SHAFT
INDEX MARKS E
Engine Spar Valve Adapter
Figure 401 (Sheet 3)
L11319
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(7)
AMM 28-22-00/501, Engine Fuel Feed System
(8)
AMM 28-22-01/401, Engine Fuel Shutoff (Spar) Valve Actuator
(9)
AMM 51-21-04/701, Alodine Coating
(10)
SWPM 20-20-00, Electrical Ground and Bond
E.
Access
(1)
Location Zones 521 Leading Edge to Front Spar, Left 542 Inbd Main Tank (Part), Front Spar to Mid Spar, Left 551 Outbd Main Tank (Part), Front Spar to Mid Spar, Left 621 Leading Edge to Front Spar, Right 642 Inbd Main Tank (Part), Front Spar to Mid Spar, Right 651 Outbd Main Tank (Part), Front Spar to Mid Spar, Right
(2)
Access Panels
521EB Lower Skin Leading Edge Access Panel
545BB Fuel Tank Access Door
552EB Fuel Tank Access Door
552FZ Mid Spar Access Door
621EB Lower Skin Leading Edge Access Panel
645BB Fuel Tank Access Door
652EB Fuel Tank Access Door
652FZ Mid Spar Access Door
F.
Procedure
S 144-033
(1)
Prepare these components for an electrical surface bond
(SWPM 20-20-00):
(a)
Mating surfaces of the index plate and valve actuator.
(b)
Mating surfaces of the bonding jumper and bonding jumper tab.
(c)
AIRPLANES WITHOUT PRIMER BETWEEN THE SPAR AND THE ADAPTER PLATE; Mating surface of the front spar and adapter plate.
NOTE: If the spar has a protective finish (primer coating)
____ under the adapter plate, it is not necessary to do this step.
S 424-066
(2)
Do these steps to prepare the adapter plate (1) for installation:
(a)
Lubricate the new O-ring (6) with petrolatum.
(b)
Install the O-ring (6) in the groove on the adapter plate (1).
(c)
Make sure the mating surface of the adapter plate (1) is free from any petrolatum squeeze out.
S 424-067
(3)
Do these steps to install the valve adapter:
