(3)
Press PERF DATA key on the PMS CDU. Push the CDU slew switch as required to advance the display to PERF DATA.....2/4 page.
Data line 1 indicates the engine bleed (pylon valve) for each engine as follows:
'BLD X X X X' (ENG. 1) (ENG. 2) (ENG. 3) (ENG. 4)
Data line 2 indicates the engine anti-ice valve position status for each engine as follows:
'A/I X X X X' (ENG. 1) (ENG. 2) (ENG. 3) (ENG. 4)
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(4) For each engine, close and then open the BLEED AIR valve (pylon valve) switch on the air conditioning module, on the P4 panel (Ref 36-00-00). When the switches are closed verify that the respective VALVE CLOSED light is illuminated; when the switches are open verify that the lights are extinguished. Verify that the CDU display is as follows for the bleed air valve switch positions:
ENGINE BLEED
ENGINE BLEED PMS CDU DISPLAY
AIR PERF DATA.....2/4 PAGE.
SWITCH DATA LINE 1
POSITION
__________________________________________________________________
1 CLOSE BLD - x x x OPEN BLD 1 x x x
2 CLOSE BLD x - x x OPEN BLD x 2 x x
3 CLOSE BLD X X - X OPEN BLD x x 3 x
4 CLOSE BLD x x x -OPEN BLD x x x 4
x = Don't care.
(5)
Allow each bleed air valve (pylon valve) to remain in the open position.
(6)
For each engine, place the NACELLE ANTI-ICE (NAI) switch to the OFF position and then to the ON position (Ref 30-21-00). (The NAI switches are located on the NAI module on the P5 panel.) When the switches are OFF verify that the respective NACELLE VALVE OPEN light is extinguished; when the switches are ON verify that the lights are illuminated. Verify that the CDU display is as follows for the NAI switch positions:
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NACELLE ANTI-ICE (NAI)
ENGINE NAI SWITCH POSITION PMS CDU DISPLAYPERF DATA.....2/4 PAGE.DATA LINE 2
__________________________________________________________________
1 OFF ON
2 OFF ON
3 OFF ON
4 OFF ON
(7) (8) Place the NAI switches to OFF. valve) switches.Press CDU CLEAR key.
A/I - x x x x
A/I 1 x x x xA/I x - x x xA/I x 2 x x x
A/I x x - x x
A/I x x 3 x xA/I x x x - xA/I x x x 4 x x - Don't care.
Close the BLEED AIR valve (pylon
(9) Engine run condition is no longer required. AL. PMS Select, Auto Throttle Engage, and Red/Amber Warning.
(1) If required prepare for test as described in paragraph D.
(2) Ensure that all engines are not operating.
(3) 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.
(4) Ensure that present position latitude and longitude coordinates
are entered into each INS (Refer to 34-41). Verify that the mode
selector switch, on each INS MSU, is set to ALIGN.
(5) Ensure that gross weight of airplane is entered into the PMS.
(6) 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.
(7) 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.
(8) Verify that the Captain's and F/O's FLT DIR CMPTR select switches
are set to 'A'.
EFFECTIVITY
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(9) 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 OFF.
Auto throttle (A/T) Engage Switch to OFF
(10)
Close LRRA-1 and LRRA-2 system circuit breakers, to simulate a radio altitude below 2500 feet on LRRA-1 and LRRA-2 respectively.
(11)
Place the TURB/SPEED switch on the A/P-F/D MSP to the PMS position and verify that the switch does not remain in the selected position for more than approximately 1.5 seconds.
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本文链接地址：747飞机维护手册AMM CHAPTER 34 - NAVIGATION 第34章导航4(158)
