SUBTASK 80-11-03-840-001-F00
(6) If you remove the Engine 1 start valve, make sure that the BLEED APU switch on the P5
Forward Overhead Panel is in the OFF position:
SUBTASK 80-11-03-860-006-F00
(7) If you remove the Engine 2 start valve, make sure that ground pneumatic power is not applied.
SUBTASK 80-11-03-010-004-F00
(8) On the applicable engine, open the left fan cowl panel (TASK 71-11-02-010-801-F00).
E. Start Valve Removal
SUBTASK 80-11-03-020-001-F00
(1) Disconnect the MWO312 harness electrical connector [4] from the start valve [10] receptacle.
SUBTASK 80-11-03-020-002-F00
(2) Disconnect the bonding jumper [6] from the start valve [10].
(a) Remove the bolt [8], the washer [7], and the nut [5] from the bonding jumper [6].
SUBTASK 80-11-03-010-002-F00
(3) Remove the couplings [2] from the upper pneumatic starter duct [3] and the lower pneumatic
starter duct [9].
SUBTASK 80-11-03-020-003-F00
(4) Remove the start valve [10].
SUBTASK 80-11-03-020-004-F00
(5) Remove the seal rings [1].
NOTE: The seal rings are in the ID between the start valve and duct flanges.
(a) Examine the seal rings [1] for damage.
1) If you find cracks, dents or other damage, replace the seal rings [1].
2) If a seal ring [1] is serviceable, keep it for the installation with the replacement valve.
SUBTASK 80-11-03-860-007-F00
(6) Put the protective covers on the openings to the start valve and the ducts
(TASK 70-10-02-910-801-F00).
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
CFM56 ENGINES (CFM56-7)
80-11-03
Page 402
D633A101-ILF Oct 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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