Boeing 737 - PACK TRIP OFF

737 Operations Manual
Non-Normal Checklists -
Air Systems
Copyright © The Boeing Company. See title page for details.
NNC.2.8 D6-27370-400E-TBCE
PACK TRIP OFF
Condition: A PACK TRIP OFF light illuminated indicates the
related pack valve closed due to temperature
exceeded limits.
TEMPERATURE
SELECTOR . . . . . . . . . . . . . . . . . . . WARMER TEMPERATURE
[Reduces the work load on the affected air conditioning pack.]
TRIP RESET SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . PUSH
[The PACK TRIP OFF light extinguishes if the pack temperature has
cooled below limits.]
If both PACK TRIP OFF lights remain illuminated:
DESCENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . ACCOMPLISH
Monitor cabin altitude and rate. Descend to lowest
safe altitude or 10,000 feet, whichever is higher.
At level off:
AIRSPEED . . . . . . . . . . . . . . . . . . . 290 KNOTS MINIMUM
[Flight deck and cabin temperatures may increase rapidly below
290 knots.]
PRESSURIZATION MODE
SELECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MAN DC
OUTFLOW VALVE SWITCH . . . . . . . . . . . . . FULL OPEN
[Increases airplane ventilation.]
If flight deck and cabin temperatures are excessively
warm:
FLIGHT DECK DOOR . . . . . . . . . . . . . . . . . . . . . . . OPEN
[Improves flight deck ventilation.]
CABIN LIGHTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . DIM
IN-FLIGHT ENTERTAINMENT SYSTEMS . . . . . . . . .OFF
FLIGHT DECK AND CABIN
WINDOW SHADES . . . . . . . . . . . . . . . . . . . . . . . CLOSED
Continued on next page
December 07, 2001