MANUAL OVERRIDE START VALVE
FWD
B 2. START VALVE V351
Start Valve Installation Figure 401
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80-11-02
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
2) 6G23 ENG SCU 1 3) 6G16 SCU ALT PWR ENG 2 4) 6G24 ENG SCU 2 5) 6G17 SCU ALT PWR ENG 3 6) 6G25 ENG SCU 3 7) 6G18 SCU ALT PWR ENG 4 8) 6G26 ENG SCU 4 9) 6J18 ENG START AIR CONT
S 864-003-N00
(2) Supply electrical power (AMM 24-22-00/201).
S 864-004-N00
(3) Release the pressure in the pneumatic system as follows: (a) Put the applicable NACELLE ANTI-ICE VALVE switch on the overhead panel, P5, to the "on" position. (b) Push the ECS switch on the select panel for the EICAS display. (c) Monitor the ENG DUCT PRESSURE on the auxiliary EICAS display. 1) When the pressure decreases to 0 psig, put the applicable NACELLE ANTI-ICE VALVE switch to the "off" position.
S 044-038-N00
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSERS. THE ACCIDENTAL OPERATION OF THE THRUST REVERSERS CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(4)
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).
S 014-039-N00
(5)
Open the core cowl panels (AMM 71-11-06/201).
S 024-045-N00
(6)
Do these steps to remove the start valve (Fig. 401):
(a) Disconnect the electrical connector DV351 (1) from the start valve (2).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(b)
Remove the nut (6), washer (7), screw (8) and bonding jumper
(9) from the start valve (2) flange.
(c)
Do these steps to remove the interconnect duct (5), if necessary: 1) While you hold the interconnect duct (5), remove the
couplings (3). 2) Move the interconnect duct (5) up and out to remove it from the engine.
(d)
Remove the seal(s) (4).
(e)
Remove the coupling (3) that holds the start valve (2) to the starter duct.
(f)
Remove the coupling (6) that holds the start valve (2) to the starter duct.
(g)
Remove the start valve from the engine.
(h)
Remove the seal (4).
(i)
Install the dust caps on the start valve (2), duct, and starter openings.
TASK 80-11-02-404-015-N00
3. Install the Start Valve
_______________________
A. Standard Tools and Equipment
(1) Bonding Meter (AMM 20-22-01/601)
B. Parts
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 2 | Start Valve | 80-11-02 | 01 | 15 | | | 3 | Coupling | | | 5 | | | 4 | Seal | | | 10 | | | 5 | Innerconnect Duct | 36-11-01 | 05 | 25 | | | 6 | Nut | | | 20 | | | 7 | Washer | | | 15 | | | 8 | Screw | | | 10 | 2......…........…...................................…..........….....….........1
C. References
(1)
AMM 20-11-15/401, Bonding Jumpers and Ground Leads
(2)
AMM 20-22-01/601, Electrical Bonding
(3)
AMM 71-11-06/201, Core Cowl Panels
(4)
AMM 78-31-00/201, Thrust Reverser System
(5)
AMM 80-11-00/501, Engine Starting System
(6)
WDM 80-11-11, 80-11-21, 80-11-31, 80-11-41
(7)
SSM 80-11-01, 80-11-02, 80-11-03, 80-11-04
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