737 Operations Manual
Non-Normal Checklists -
Air Systems
Copyright © The Boeing Company. See title page for details.
D6-27370-400E-TBCE NNC.2.3
BLEED TRIP OFF
Condition: The BLEED TRIP OFF light illuminated indicates the
related engine bleed air temperature or pressure is
excessive.
WING ANTI-ICE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . .OFF
TRIP RESET SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . PUSH
[The BLEED TRIP OFF light extinguishes if bleed air temperature has
cooled below limits.]
If the BLEED TRIP OFF light remains illuminated:
PACK SWITCH (affected side) . . . . . . . . . . . . . . . . . . . .OFF
[Causes operating pack to regulate to high flow in flight with flaps up.]
Avoid icing conditions.
If the BLEED TRIP OFF light extinguishes:
WING ANTI-ICE . . . . . . . . . . . . . . . . . . . . . . . AS REQUIRED
CAUTION: Use of wing anti-ice above approximately
FL350 may cause bleed trip off and possible
loss of cabin pressure.
DUAL BLEED
Condition: The DUAL BLEED light illuminated indicates the APU
bleed valve open and No. 1 engine BLEED air switch
ON, or No. 2 engine BLEED air switch ON with APU
bleed air valve and isolation valve open.
Limit engine thrust to idle while the light is illuminated.
After engine start:
APU BLEED AIR SWITCH . . . . . . . . . . . . . . . . . . . . . . . .OFF
December 06, 2002
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