SUPPORT
BRACKET
WIRE BUNDLE FWDSUPPORT BRACKET
BLEED VALVE A
SIGNAL TUBE NUT RIGHT 2.9 BLEED
BOLT AND NUT VALVE
PS3 AIR TUBES
ADAPTER
BLEED DUCT BOLT AND NUT
FLANGE GROUND BRACKET
BOLT AND NUT BRACKET
(8 LOCATIONS)
FWD FWD
BURNER PRESSURE
A-A
TUBE
B
2.9 Bleed Valve Installation Figure 401 (Sheet 1)
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LEFT 2.9 BLEED DUCT
SEE B
B
ADAPTER BLEED VALVE SIGNAL TUBE NUT B
SCREW WASHER (4 LOCATIONS) SCREEN SCREW FWD BOLT (8 LOCATIONS) LEFT 2.9 BLEED VALVE SEE C
B
GROUND BRACKET SUPPORT BRACKET FIRE DETECTOR
VALVE 2.9 BLEED BRACKET SUPPORT HARNESS
BLEED VALVE FLANGE
(2 LOCATIONS) BOLT
C COVER B-B NUT (8 LOCATIONS) BOLT AND
Figure 401 (Sheet 2) 2.9 Bleed Valve Installation
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 864-002-N00
WARNING: YOU MUST OPEN THE APPLICABLE ENGINE IGNITION CIRCUIT BREAKERS
_______ BEFORE YOU OPEN THE ENGINE FUEL CONT VALVE CIRCUIT BREAKER. IF YOU DO NOT DO THIS, THE IGNITER PLUGS WILL AUTOMATICALLY FIRE IF THE FLAPS ARE OUT OF ZERO DETENT, THE NACELLE ANTI-ICE IS ON, THE CON IGNITION SWITCH IS SET TO "ON", OR THE ENGINE START SWITCH IS PULLED TO "ON". WITH FUEL IN THE COMBUSTION CHAMBER, AN INTERNAL ENGINE OR TAILPIPE FIRE CAN OCCUR AND CAUSE INJURY TO PERSONS OR DAMAGE TO THE ENGINE.
(1) For the left 2.9 bleed valve, open these circuit breakers for the applicable engine and attach the DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel
1) 6F1 IGN 1 ENG 1
2) 6F2 IGN 1 ENG 2
3) 6F3 IGN 1 ENG 3
4) 6F4 IGN 1 ENG 4
5) 6K19 IGN 2 ENG 1
6) 6K20 IGN 2 ENG 2
7) 6K21 IGN 2 ENG 3
8) 6K22 IGN 2 ENG 4
9) 6G19 STBY IGN ENG 1
10) 6G20 STBY IGN ENG 2
11) 6G21 STBY IGN ENG 3
12) 6G22 STBY IGN ENG 4
(b) P6 Main Power Distribution Panel
1) 6D1 OIL PRESS ENG 1
2) 6D2 OIL PRESS ENG 2
3) 6D3 OIL PRESS ENG 3
4) 6D4 OIL PRESS ENG 4
5) 6L10 FUEL CONT VALVE ENG 1
6) 6L11 FUEL CONT VALVE ENG 2
7) 6L12 FUEL CONT VALVE ENG 3
8) 6L13 FUEL CONT VALVE ENG 4
(c) P180 DC Power Distribution Panel
1) 180C8 GCU 1
or
180M4 GCU 1
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2) 180C9 GCU 2
or
180M5 GCU 2
3) 180C10 GCU 3
or
180M6 GCU 3
4) 180C11 GCU 4
or
180M7 GCU 4
5) 180C12 GEN DRIVE DISC 1
or
180L4 GEN DRIVE DISC 1
6) 180C13 GEN DRIVE DISC 2
or
180L5 GEN DRIVE DISC 2
7) 180C14 GEN DRIVE DISC 3
or
180L6 GEN DRIVE DISC 3
8) 180C15 GEN DRIVE DISC 4
or
180L7 GEN DRIVE DISC 4
(d)
P6 Main Power Distribution Panel
1) 6J18 ENG START AIR CONT
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