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Certain combinations of altitude and temperature may cause the APU bleed
valve to limit available air for starting to keep the APU from exceeding
temperature limits. In such circumstances, available air may be increased by
reducing electrical load.
Prior to starter engagement consideration may be given to turning off one or
more of the following:
· Galley or CAB / UTIL switch
· BCD IFE / PASS SEAT switch (if installed)
· Window heat
· Electric hydraulic pump(s).
Carefully evaluate the effect on the individual system. Electrical load may also
be reduced for the second engine start by selecting the first engine generator ON
after careful evaluation of nosewheel steering hydraulic configuration.
Do not reduce electrical load with engine starter engaged.
>>@ Considerations for starting engines at airport elevations above 7000
feet MSL, if needed, are in section 2.7.
The above procedures should only be used in extreme cases and should not
become the norm. If an APU is consistently weak for engine start, enter a
maintenance discrepancy.
737 Sec. 3 Page 79
Flight Manual Continental Rev. 11/15/02 #41
Engines Running
After engine(s) are running, advise the headset operator that “ENGINE START
IS COMPLETE-CLEARED TO DISCONNECT.”
Sec. 3 Page 80 737
Rev. 11/15/02 #41 Continental Flight Manual
INTENTIONALLY LEFT BLANK
737 Sec. 3 Page 81
Flight Manual Continental Rev. 11/15/02 #41
>>@ AFTER START FLOW
Sec. 3 Page 82 737
Rev. 11/15/02 #41 Continental Flight Manual
BCD AFTER START FLOW
737 Sec. 3 Page 83
Flight Manual Continental Rev. 11/15/02 #41
AFTER START
The Captain will call for the AFTER START checklist after the engine(s) have
reached a stabilized idle and the headset operator has been cleared to
disconnect.
The AFTER START flow will be initiated when the Captain calls for the
checklist. This checklist will be completed prior to releasing the brakes for taxi.
F/O CHALLENGE AFTER START CAPT. RESPOND
Generator(s)..............................................................................................ON
Pitot Heat...................................................................................................ON
Anti-Ice .............................................................................(AS REQUIRED)
Flight Deck Door .............................................. CLOSED AND LOCKED
F/O Challenge Capt. Respond
Generator(s) ..................................................................................................ON
Position operating generator switch(es) to ON and verify:
>>@ GEN OFF BUS lights extinguish.
BCD SOURCE OFF light extinguished.
Pitot Heat.......................................................................................................ON
>>@ pitot heat switches ON.
BCD probe heat switches ON.
Verify that all amber lights extinguish.
Anti-Ice .................................................................................(AS REQUIRED)
When icing conditions exist or are anticipated, position engine and wing
anti-ice switches ON. Verify the COWL VALVE OPEN, R VALVE OPEN, and L
VALVE OPEN lights illuminated bright, then dim. Engine start switches are to
be placed in CONT.
Note: If the COWL VALVE OPEN light fails to illuminate from bright to dim
with the engine at idle, position the APU bleed air switch to OFF
and increase thrust slightly (up to a maximum of 30% N1).
Sec. 3 Page 84 737
Rev. 11/15/02 #41 Continental Flight Manual
Air Cond & Press (Flow) .......................................... SET, (AS REQUIRED)
Position the FLT/GRD switch to FLT (as installed). FLT/GRD switch may be left
in GRD if a delayed engine start is used.
CD Position TRIM AIR switch ON after the last power transfer. The TRIM
AIR should be left in OFF if a delayed engine start is used.
For two engine taxi, under normal circumstances, configure the air
conditioning panel as follows:
Right Air Conditioning Pack.......................................................AUTO
Isolation Valve ............................................................................AUTO
Left Air Conditioning Pack .........................................................AUTO
#1 Engine Bleed Air Switch ............................................................ ON
APU Bleed Air Switch....................................................................OFF
#2 Engine Bleed Air Switch ............................................................ ON
If a Bleeds Off takeoff is planned, the air conditioning panel may be
configured as follows:
Right Air Conditioning Pack.......................................................AUTO
　
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