Place left external power switch to ON. Confirm AC EMERGENCY BUS OFF and DC EMERGENCY BUS OFF annunciator panel lights are extinguished. Place right external power switch to ON. Confirm that the following annunciator panel lights are extinguished: L AC BUS OFF, R AC BUS OFF, DC BUS OFF.
AHRS Equipped Aircraft
When power is first applied to aircraft equipped with the Altitude and Heading Reference System (AHRS), the AHRS goes through an alignment similar to an inertial reference system. It will take 45 seconds to complete the automatic alignment. During this period, the attitude and heading fail flags will be in view and the ADI spheres will be rotated.
Caution: During the 45 second automatic alignment mode (if the flags are in view and the ADI spheres are rotated), the aircraft MUST NOT BE MOVED. If the aircraft is moved or bumped (by the jetway, a service truck, or the tow bar connected to a tug), you MUST power down and restart the 45 second alignment mode. Wind buffet, passenger loading, and cargo loading will not appreciably affect the alignment process.
At the end of the 45 second period, the flags will be removed, the ADI spheres will be erected, and the AHRS will align in the normal mode.
Ground Ventilation
Note: This procedure may be used to provide ambient air ventilation when pneumatic air is not available.
Cabin ALT Control Lever.....................................................................AUTO
Outflow Valve Position Indicator.........................................................OPEN
Right Air Conditioning Supply Switch ...........AUTO OR HP BLEED OFF
Ram Air Switch...........................................................................................ON
Using Ground Preconditioned Air
The passenger cabin and flight deck may be air conditioned by attaching a preconditioned air source to the Ground Conditioned Air Service Connect located on the underside of the fuselage just right of the ventral stairs. This preconditioned air is routed directly into the supply duct manifold through the mixing chamber and into the cabin and flight deck, provided the RAM AIR switch is OFF. The flight crew has no control over the temperature or volume of this preconditioned air.
Using External Pneumatic Air
The passenger cabin and flight deck may be air conditioned by attaching a pneumatic air cart or other source of air to the Ground Pneumatic Connect located on the underside of the fuselage just left of the ventral stairs.
Cabin ALT Control Level ..........................................AUTO/VALVE OPEN
Pneumatic Crossfeed Levers.................................................................OPEN
Air Cond Supply Switches................................AUTO OR HP BLEED OFF
Ckpt/Cabin Temp Selectors ..................................................................AUTO
APU POWER / APU AIR
Starting
Battery Volts .....................................................................................CHECK
Rotate the meter selector to BATT VOLT and verify battery voltage is 25
volts or higher.
Caution: If battery voltage is less than 25 volts, move BATT switch to OFF. Battery must be replaced.
Battery Switch.........................................................................ON/LOCKED
Pull and move the battery switch to ON and rotate it to the horizontal/locked position. The APU control circuits, starter motor, and fire warning circuits are now powered.
Fire Control Panel ............................................................................CHECK
Check that both fire shutoff handles are full forward. Depress both Loop A and Loop B test buttons. Listen for a steady fire warning bell and check for 14 warning lights activated: A red light in each engine fire shutoff handle, both red MASTER WARNING lights, both MASTER CAUTION lights, the FIRE DETECTOR LOOP light, and the APU FIRE light on the annunciator panel and all six loop detector lights on the overhead panel. Push fire bell OFF button to silence bell. This test is valid for APU and engine fire protection.
Note: On some aircraft the MASTER CAUTION lights will not illuminate during fire warning test.
APU Master Switch ................................................................................ OFF
APU Air Switch....................................................................................... OFF
The bleed air switch should remain off until APU attains stabilized idle
RPM.
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本文链接地址：MD-80 Flight Manual 麦道80飞行手册 1(119)
