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H. Ensure that present position latitude and longitude coordinates are entered into each INS (Ref 34-41). Verify that the mode selector switch, on each INS MSU, is set to ALIGN.
NOTE: If the INS has been in the NAV mode, cycle the INS through
____ the STANDBY back to ALIGN and reload present position.
I. On IB airplanes, ensure that the AUTO/MAN/RMT switch on each INS CDU is set to MAN.
J. Ensure the following circuit breakers are closed:
CIRCUIT BREAKER_______________ LOCATION
PMS CDU P7 PMS SU ALTN P7 PMS SU PRIM P7 PMS CMPTR P7 PMS LSP P7 PMS ADS P7 PMS LIMIT IND P7 CONT POS FLAP OUTBD P6
K. On IB airplanes,
also ensure that the following circuit breakers are closed.
CIRCUIT BREAKER_______________ LOCATION
PMS EPR-1 REF P6 PMS EPR-2 REF P6 PMS EPR-3 REF P6 PMS EPR-4 REF P6
L. Ensure that gross weight of airplane is entered into the PMS.
4. Test PMS Switching Unit_______________________
A. Ensure that all engines are not operating.
B. Ensure that the trailing edge (TE) flaps and the leading edge (LE) flaps are retracted to the full-up position.
NOTE: For trailing edge flap operation refer to 27-51-00, Maintenance
____ Practices. For leading edge flap operation refer to 27-81-00, Maintenance Practices.
C. Open LRRA-1 and LRRA-2 system circuit breakers to simulate a radio altitude above 2500 feet, on LRRA-1 and LRRA-2 respectively.
D. On IB airplanes, select CRZ limit mode on the PMS limit select panel (LSP). Verify that the PMS limit indicator (LI) displays CRZ and some value of EPR limit (no dashes or blank display) indicating a valid EPR limit condition.
EFFECTIVITY
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E. On AF airplanes, select CRZ limit mode on the PMS limit select panel (LSP). Verify that the PMS limit indicator (LI) displays CRZ and some value of N1 limit (no dashes or blank display) indicating a valid N1 limit condition.
F. Verify that the captain's and F/O's FLT DIR CMPTR select switches are set to "A."
G. Place the following switches on the A/P-F/D MSP to the positions shown:
Captain's and F/O's FLT DIR switches to ON.
TURB/SPEED switch to PMS
Auto Throttle (A/T) ENGAGE switch to ON.
H. Position all engine throttle levers to the aft limit.
I. Press PMS CDU CLEAR key. Verify that the CDU line select 1 key is not illuminated.
J. Press and hold the PMS CDU STS/TEST key and verify the following:
(1)
PMS (amber) annunciator on the pilot's center instrument panel illuminates.
(2)
All throttle levers advance (in forward direction) at a rate of approximately 1./second.
K. Release the CDU STS/TEST key.
L. Close LRRA-1 and LRRA-2 system circuit breakers.
M. Verify TURB/SPEED switch and A/T engage switch automatically drop to OFF.
N. Reset red warnings.
O. Return the captain's and F/O's FLT DIR switches to OFF.
P. Position the throttle levers to the aft limit.
5. Restore Airplane to Normal
__________________________
A. Open all PMS circuit breakers on P7 circuit breaker panel.
B. On IB airplanes,
also open all PMS circuit breakers on P6 circuit breaker panel.
C. If operation of the INS is no longer required, place each INS mode selector switch in OFF position (Ref 34-41).
D. Remove electrical power if no longer required (Ref 24-22-00).
E. Remove equipment cooling if no longer required (Ref 21-58-00).
EFFECTIVITY
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中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747飛機維護手冊AMM CHAPTER 34 - NAVIGATION 第34章導航4(180)
