locknut on the governor adjustment screw. 3) If the speed is too low, turn the governor adjustment screw clockwise. 4) If the speed is too high, turn the governor adjustment screw counterclockwise. 5) Tighten the locknut on the governor adjustment screw.
(d)
APU WITH ALLIEDSIGNAL SB GTCP85-49-7096 AND AIRPLANES WITHOUT THE ETC; If the stable APU speed is not between 101.3% and 102.5% rpm, adjust the governor for the fuel control unit: 1) Use the screwdriver and wrench assembly to loosen the
locknut on the governor adjustment screw. 2) If the speed is too low, turn the governor adjustment screw clockwise. 3) If the speed is too high, turn the governor adjustment screw counterclockwise. 4) Tighten the locknut on the governor adjustment screw.
(e)
APU WITHOUT ALLIEDSIGNAL GTCP85-49-7096 AND AIRPLANES WITH THE ETC; If the stable APU speed is not between 101.3% and 102.5% rpm, adjust the governor for the fuel control unit: 1) Do the APU usual shutdown (AMM 49-11-00/201). 2) Use the jamnut wrench to loosen the jamnut on the governor
adjustment nut. 3) If the speed is too low, turn the governor adjustment nut clockwise with the adjuster wrench.
NOTE: Do not adjust the governor speed more than 1/12
____ of a turn total from the time the fuel control unit is calibrated on the bench. If you must adjust the governor speed more than 1/12 of a turn, then you will change the accelerator limiter valve cracking pressure, and you must do the fuel control unit acceleration limiter valve opening pressure test.
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49-11-00
ALL ú ú 09 Page 527 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
4) If the speed is too high, turn the governor adjustment nut counterclockwise with the adjuster wrench.
NOTE: Do not adjust the governor speed more than 1/12
____ of a turn total from the time the fuel control unit is calibrated on the bench. If you must adjust the governor speed more than 1/12 of a turn, then you will change the accelerator limiter valve cracking pressure, and you must do the fuel control unit acceleration limiter valve opening pressure test.
5) Tighten the jamnut on the governor adjustment nut.
(f) APU WITH ALLIEDSIGNAL SB GTCP85-49-7096 AND AIRPLANES WITH THE ETC; If the stable APU speed is not between 101.3% and 102.5% rpm, adjust the governor for the fuel control unit: 1) Use the jamnut wrench to loosen the jamnut on the governor
adjustment nut. 2) If the speed is too low, turn the governor adjustment nut clockwise with the adjuster wrench.
NOTE: Do not adjust the governor speed more than 1/12
____ of a turn total from the time the fuel control unit is calibrated on the bench. If you must adjust the governor speed more than 1/12 of a turn, then you will change the accelerator limiter valve cracking pressure, and you must do the fuel control unit acceleration limiter valve opening pressure test.
3) If the speed is too high, turn the governor adjustment nut counterclockwise with the adjuster wrench.
NOTE: Do not adjust the governor speed more than 1/12
____ of a turn total from the time the fuel control unit is calibrated on the bench. If you must adjust the governor speed more than 1/12 of a turn, then you will change the accelerator limiter valve cracking pressure, and you must do the fuel control unit acceleration limiter valve opening pressure test.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
49-11-00
ALL ú ú 11 Page 528 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
4) Tighten the jamnut on the governor adjustment nut.
(g)
APU WITH ALLIEDSIGNAL SB GTCP85-49-7096;
Do the APU usual shutdown (AMM 49-11-00/201).
(h)
Do the above test steps again until the governor speed adjustment is correct.
(i)
Attach a DO-NOT-OPERATE tag to the APU master switch on the P5 forward overhead panel.
(j)
Open this circuit breaker and attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit
S 085-046
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