(b) Push the ENGINE LSK.
NOTE: This causes the ENGINE/EXCEED BITE INDEX screen to show.
(c) Push the opposite ENGINE X LSK.
NOTE: This causes the ENGINE X BITE TEST MAIN MENU to show. Also, the ENGINE
X LSK automatically applies power to the EEC and causes the EEC to initialize.
The CDU will show INITIALIZING EEC X, and EEC SORTING FAULT HISTORY
DATA for a short time, just before the ENGINE X BITE TEST MAIN MENU
shows.
(d) Push the INPUT MONITORING LSK.
NOTE: This will cause the INPUT MONITORING menu to show.
(e) Push the CONTROL LOOPS LSK.
NOTE: This will cause screen 1 of the CONTROL LOOPS to show.
(f) Push the NEXT PAGE key two times, to get access to screen 3 of the CONTROL
LOOPS.
(g) Push the TRA LSK on screen 3 of the CONTROL LOOPS.
NOTE: This causes the TRA for channels A and B, of Engine X, to show.
NOTE: The data for the channel that is in control will show first.
1) The TRA POSITION CH A and TRA POSITION CH B indications on the CDU must
read 36.0 ±0.8 degree.
2) If the indications are not in the specified range, do the applicable resolver
adjustment below and continue the procedure at the step that follows.
CAUTION
MAKE SURE THAT YOU DO NOT MOVE THE INITIAL THRUST LEVER AS
YOU DO THIS STEP. DO NOT MOVE THE OPPOSITE THRUST LEVER
TO A POSITION THAT IS GREATER THAN THE INITIAL THRUST LEVER.
IF YOU DO, YOU MUST MOVE THE OPPOSITE THRUST LEVER TO THE
IDLE STOP AND MOVE IT FORWARD AGAIN. IF YOU DO NOT OBEY
THESE INSTRUCTIONS, THE RESULTS OF THE TEST ARE NOT
ACCURATE.
(h) Slowly move the opposite thrust lever forward until the knob aligns with the knob on the
initial thrust lever, ±1/16 of a knob width.
(i) Record the value that shows in the POSITION CH A line to the nearest tenth of a degree.
(j) Calculate the difference between opposite POSITION CH A and initial POSITION CH A.
NOTE: Opposite Engine POSITION CH A — Engine under test POSITION CH A =
difference.
(k) Make sure that the difference is 0.0 ±1.0 degree.
1) If the indications are not in the specified range, do the resolver adjustment below for
the initial or opposite thrust lever.
2) Use the position values which you recorded at IDLE to find which resolver to adjust.
a) Choose the resolver which you can adjust to be in the limits at IDLE and at the
78 degree position.
3) Continue the procedure at the step that follows.
(l) If the difference is in the specified range, the test is completed.
(m) Move the two thrust levers to the idle stop.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
CFM56 ENGINES (CFM56-7)
76-11-05
Page 505
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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