2 SELECT ALL FLIGHTS ONE AT A TIME AND RECORD THE INFORMA-TION. PUSH LSK 6L "<INDEX".
3 GO TO "CURRENT STATUS" AND FOLLOW THE INSTRUCTIONS. IF YOU FIND FAULTS, ENTER "100" IN THE SCRATCHPAD OF THE CDU AND PUSH LSK 6L TO GET ENGINEERING DATA. IF NO FAULTS ARE FOUND, PUSH LSK 6L TO GO TO INDEX.
SEE SHEET 2(BLOCK 4) Thrust Lever Does Not Move During Autothrottle Operation Figure 104 (Sheet 1)
G40026
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 1 (BLOCK 3)
NO
4 FOR A/T COMPUTER WITH
SEE BLOCK 6 P/N 10-62017-25: ARE ALL THESE POINTS TRUE? . THE MESSAGE "THROT TS1 (2) SYNC ADJUST" IS GIVEN . THE MESSAGE "TS1 (2) OPEN IN ERROR" IS NOT GIVEN . THRUST LEVER DOES NOT MOVE, AFTER IT MOVES ONE OR TWO INCHES FROM THE FORWARD STOP.
YES
5 MAKE A CHECK OF THE PLA SYNCHRO ADJUSTMENT AND CORRECT IF NECESSARY (AMM 22-31-11/ 501).
____ IF PLA SYNCHRO IS MORE
NOTE: THAN APPROXIMATELY 20 DEGREES OUT OF ADJUSTMENT IN THE NEGATIVE DIRECTION, THEN THE THRUST LEVER CAN FAIL TO DRIVE FORWARD FROM THE IDLE STOP POSITION.
6 FOR THE A/T COMPUTERS WITH P/N 735SUE6-9 OR LATER:
DO THE TEST OF THE TORQUE SWITCH:
. PUSH LSK 4L "<INTERACTIVE"
. PUSH LSK 2L "<INPUT DISCRETES"
. PUSH "NEXT PAGE" UNTIL YOU GET PAGE 4/6
. CAREFULLY PUSH THE POWER LEVER TO A POSITION AND SLOWLY RELEASE
THE LEVER
-WAIT 3 SECONDS AND MAKE SURE THE DISPLAY SHOWS "TORQUE SW1 (2) CLOSED"
. APPLY A SMALL FORCE TO THE THRUST LEVER TO OPEN THE TORQUE SWITCH AND HOLD IT OPEN
-WAIT 3 SECONDS AND MAKE SURE THE DISPLAY CHANGES TO SHOW "TORQUE SW1 (2) OPEN" . SLOWLY RELEASE THE THRUST LEVER. WAIT 3 SECONDS AND MAKE SURE THE DISPLAY CHANGES TO SHOW "TORQUE SW1 (2) CLOSED"
. DO THIS TEST SEVERAL TIMES TO EXAMINE THE THRUST LEVER IN DIFFERENT POSITIONS.
NOTE: IN NORMAL OPERATION, THE TORQUE SWITCH OPENS WHEN A SMALL FORCE IS APPLIED TO THE THRUST LEVERS. WHEN THE FORCE IS REMOVED THE TORQUE SWITCH WILL CLOSE.
SEE SHEET 3 (BLOCK 7)
Thrust Lever Does Not Move During Autothrottle Operation
Figure 104 (Sheet 2)
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ú Mar 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
G40027
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 2 (BLOCK 6
7 FOR THE A/T COMPUTERS PRIOR TO P/N 735SUE6-9:
DO THE TEST OF THE TORQUE SWITCH:
. OPEN AND TAG THE AUTOTHROTTLE CIRCUIT BREAKERS AT THE P18-1:
AUTOTHROTTLE DC
AUTOTHROTTLE AC
. CONNECT AN OHMMETER BETWEEN PINS 1 AND 2 OF TERMINAL BLOCKS T328 AND T239, INBOARD OF THE TORQUE SWITCH MECHANISM
. CAREFULLY PUSH THE THRUST LEVER TO A POSITION AND THEN SLOWLY RELEASE THE LEVER. MAKE SURE THE METER INDICATES THERE IS CONTINUITY, TORQUE SWITCH IS CLOSED
. APPLY A SMALL FORCE TO THE THRUST LEVER TO OPEN THE TORQUE SWITCH AND HOLD IT OPEN. MAKE SURE THE METER INDICATES THERE IS NO CONTINUITY, TORQUE SWITCH IS OPEN
. RELEASE THE FORCE ON THE LEVER AND MAKE SURE THE METER SHOWS THERE IS CONTINUITY
. DO THIS TEST SEVERAL TIMES TO EXAMINE THE THRUST LEVER IN DIFFERENT POSITIONS.
____ IN NORMAL OPERATION, THE TORQUE SWITCH OPENS WHEN A SMALL
NOTE: FORCE IS APPLIED TO THE THRUST LEVERS. WHEN THE FORCE IS REMOVED THE TORQUE SWITCH WILL CLOSE.
INCORRECT ROUTING OF THE CONTROL CABLE. MAKE SURE THE CABLE ROUTING THROUGH THE PULLEYS IS CORRECT AND DOES NOT TOUCH THE SURROUNDING STRUCTURE.
IS THE CABLE LOOP SERVICEABLE?
YES
NO
11 DISCONNECT THE TURNBUCKLES OF THE FORWARD CONTROL LOOP
(AMM 76-11-04/201).
DO AN INCPECTION OF THE FORWARD LOOP PULLEYS.
IS THE PULLEY SERVICEABLE?
SEE SHEET 4 (BLOCK 12)
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