This step normally accomplished by the Capt (F/O on restart).  Turn galley power and air conditioning packs off (right pack only for restart).  After starting one engine, the pack for that engine may be turned on after the engine is stabilized and the PNEU X-FEED valve closed.
PNEU X-Feeds, Pressure................... ......................OPEN, CHECKED

This step is normally accomplished by the Capt (F/O on restart).  Open both X-feeds (right X-feed only for restart).  Pneumatic pressure should indicate 36 psi minimum at sea level minus 1 psi for each 1,000 feet above sea level.
.  Engine Restart items:  These must be accomplished prior to restarting the right engine following single engine taxi.
INTENTIONALLY LEFT BLANK
GATE DEPARTURE PROCEDURES
Aircraft Walkaround Verification For All Departures
A member of the ground crew must verify that all aircraft doors and access panels are properly closed and secured prior to all departures.  The Lead or Safety Agent should state to the flight crew over interphone:  “Walkaround complete:  All doors and access panels secure; Ready for pushback/Cleared for engine start”.  If the crew does not receive this verification, a challenge should be made to the headset operator prior to aircraft movement or engine start.  If headset communication is not available, person to person contact must be made with the Lead or Safety Agent.
Push Back Gate Departure
The Captain will normally handle intercom communications and brakes.  The First Officer will normally handle clearance delivery, flow control, ground control, and company communications.
If headset communication is not possible, the marshaller and Captain should agree on procedures and signals to be used.  Engine start during pushback is not authorized unless normal headset communication is available.
After the tractor and tow bar have been connected and clearance obtained, give push-out signal to tractor operator.  Headset operator must accompany tractor and aircraft during pushout to observe for possible safety hazards. Tractor operator is responsible to observe headset operator and aircraft for signals or possible safety hazards.  After tractor and tow bar are clear of aircraft, proceed as in Taxi-Out Gate procedure.
Powerback Gate Departure
Powerback is authorized only at specified gates at selected airports.  These are listed in the Operations Manual.
Powerback is not authorized if:
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A reverser or reverse light on an engine is inoperative.

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There is ice, snow, slush, or heavy rain.

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Signalman’s wands are not available.

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There is any aircraft movement at adjacent gates.

All powerback operations will be conducted with two engines.  If powerback cannot be accomplished for any reason, notify ground crew as soon as possible.
After engines are stabilized at idle, advise the headset operator that they are cleared to disconnect the headset.  The Captain should now observe the signalman in front of the aircraft.
Note:  If difficulty starting the aircraft rolling backwards is encountered or expected due to flat spots on tires, hot weather, high gross weight etc., it is recommended that the aircraft be moved forward slightly (2-3 feet) using forward thrust prior to initiating the powerback procedure.  There will be no signal from the signalman for this slight forward movement; however, when practical, the Captain should coordinate ahead of time with the headset operator or signalman when there is no headset operator.
WARNING:  Do not use brakes while the airplane is moving rearward.  If brakes are inadvertently applied while in rearward motion and aircraft starts to tip, move throttles into forward thrust immediately.  If the nosewheel lifts off the ground, maintenance inspection is required.
Caution:  In event of thrust reverser failure while in reverse, use necessary forward thrust on other engine to stop rearward motion.
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Leave flaps retracted until powerback is completed and aircraft has taxied away from the ramp.

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Thrust reversers on both engines must be operative.

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Do not apply more than 1.3 EPR during reverse taxi.  Thrust values in excess of 1.2 EPR should be limited to momentary power application as necessary to powerback operations.

When powerback is planned, the crew should be ready to start engines three
(3) minutes prior to scheduled departure time.  Coordination of multiple powerback operations and on time block out may require the engines to be started early.  When ready to commence the powerback, the Captain will signal the signalman by turning the taxi light on and then off.  When the area is clear, the signalman will initiate powerback by giving the powerback signal.
　
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