(15)
On AF airplanes, press the N1 mode switch (to select N1 mode) on the Captain's A/T mode select panel. Verify that SELECT is illuminated on both the Captain's and F/O's N1 switches.
(16)
Press the PMS CDU STS/TEST key. Press the CDU line select 1 key, verify the key illuminates.
(17)
Place the A/T engage switch to ON. Verify that the switch remains ON and that the throttle levers move in the forward (advance) direction.
(18)
Press and hold the PMS CDU STS/TEST key. Verify that there is no movement of the throttle levers in the aft (retard) direction.
(19)
Release the CDU STS/TEST key.
(20)
Place the TURB/SPEED switch to the PMS position, verify that:
(a)
The TURB/SPEED switch remains in the PMS position.
(b)
The A/T engage switch remains in the ON position.
(c)
On IB airplanes, the EPR SELECT switch annunciators extinguish, on both the Captain's and the F/O's A/T mode select panels.
(d)
On AF airplanes, the N1 SELECT switch annunciators extinguish, on both the Captain's and the F/O's A/T mode select panels.
(21)
Press the PMS CDU STS/TEST key. Press the CDU line select 1 key, verify the key illuminates.
(22)
Press and hold the PMS CDU STS/TEST key. Verify that the throttles move aft (retard) at a rate of approximately 1.8./second.
(23)
Release the CDU STS/TEST key.
(24)
Return the following switches on the A/P-F/D MSP to the positions shown:
Captain's and F/O FLT DIR switches to OFF
A/T Engage switch to OFF
TURB/SPEED switch to OFF
(25) Reset (extinguish) the A/T red warning by pressing an A/T disconnect switch on the throttle levers.
EFFECTIVITY
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(26)
Position the throttle levers to the aft limit.
(27)
Close the GND SAFETY RELAY circuit breaker to place the relay in the GND position.
(28) If the PMS is no longer required, restore airplane to normal. AT. Auto Mode Transition (PMS to ATS)
(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) Open LRRA-1 and LRRA-2 circuit breakers, to simulate a radio
altitude above 2500 feet, on LRRA-1 and LRRA-2 respectively.
(5) 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.
NOTE:____ If the INS has been in the NAV mode, cycle the INS through
STANDBY back to ALIGN and reload present position.
(6)
Ensure that gross weight of airplane is entered into the PMS.
(7)
On IB airplanes, select CRZ limit mode on the PMS limit select panel (LSP). Verify that the PMS limit indictor (LI) displays CRZ and some value of EPR limit (no dashes or blank display) indicating a valid EPR limit condition.
(8)
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.
(9)
Open the GND SAFETY RELAY circuit breaker, to place the relay in the AIR position. (Refer to 32-09-02, Ground Safety Relay -Adjustment/Test).
(10)
Ensure that the auto throttle system is operational (Refer to 22-31).
(11)
Position the throttle levers to the aft limit.
(12)
Place the Captain's and F/O's FLT DIR CMPTR select switches to 'A'.
EFFECTIVITY
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(13) 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
(14)
Verify that the FAST/SLOW pointer on each ADI is driven out of view.
(15)
Connect a pneumatic test unit to the airplane pitot static system (Refer to 34-11-00).
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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(165)
