(2)
Ohmmeter or continuity tester
B. References
(1) 74-00-00/501, Ignition
C. Access
(1)
Location Zones
101 Left Control Cabin
102 Right Control Cabin
(2)
Access Panels
S1012L Control Stand Forward Access Covers
S1012R Control Stand Forward Access Covers
D. Procedures (Fig. 501, 502)
S 865-002-C00
(1)
Open these circuit breakers and attach the DO-NOT-CLOSE tags:
(a) P6 Load Control Center
1) L IGN
2) R IGN
(2)
Make sure the start levers are in the CUTOFF detent.
S 015-004-C00
(3)
Remove the forward, bottom panels on the two sides of the pilot's control stand.
(4)
Loosen the cam adjustment screws.
S 215-003-C00
S 035-005-C00
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEEA
ENGINE START LEVERS
ENGINE START
SEE B
LEVER OPERATED
SWITCHES ACCESS
PANEL
ENGINE START LEVERS
FWD
IGNITION
CAMS
PILOT'S CONTROL STAND
IGNITION AND FUEL
A
SHUTOFF CAMS
FUEL SHUTOFF SWITCHES START CONTROL DRUM
1
S91
S90
S89
S88
FWD
115V AC
IGNITION
1 REF 28-22-12/401
SWITCHES
B
Engine Start Lever Switches Adjustment
Figure 501
B73899
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Ignition Start Lever Switches Adjustment
Figure 502
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B73888
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 825-006-C00
(5) To adjust the switch cams on the start drum, move the cams in the slots to satisfy the conditions that follow: (a) All of the switches actuate when the start lever is 3 to 9 degrees in the forward direction from the cutoff position. (b) Switches must stay in the run position when you move the start lever to the IDLE detent.
(c) Switches must be in the cutoff position when the start lever is in the CUTOFF detent.
S 435-007-C00
(6) Tighten the cam adjustment screws.
S 865-008-C00
(7) Put the start levers in the CUTOFF detent.
S 765-009-C00
(8) Do the continuity test of the switches with an ohmmeter or continuity tester as follows: (a) Make sure there is continuity with the switches in the off (deactuated) position.
S 865-010-C00
(9) Put the start levers at the 10 degrees out of CUTOFF detent and check continuity as follows: (a) Make sure there is continuity with the switches in the on (actuated) position.
S 715-011-C00
(10)
Do a test to operate the start lever switches (Ref 74-00-00/501).
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