737 Flight Crew Operations Manual
Checklist Instructions -
Non-Normal Checklists
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CI.2.2 D6-27370-4Q8-SJA
Non–Normal Checklist Operation
Non–normal checklists start with steps to correct the situation. If needed,
information for planning the rest of the flight is included. When special items are
needed to configure the airplane for landing, the items are included in the Deferred
Items section of the checklist. Flight patterns for some engine out situations are
located in the Maneuvers chapter and show the sequence of configuration
changes.
While every attempt is made to supply needed non–normal checklists, it is not
possible to develop checklists for all conceivable situations. In some smoke, fire
or fumes situations, the flight crew may need to move between the Smoke, Fire or
Fumes checklist and the Smoke or Fumes Removal checklist. In some multiple
failure situations, the flight crew may need to perform several checklists or
combine the elements of more than one checklist. Consider doing memory items
first. In all situations, the captain assesses the situation and uses good judgment to
determine the safest course of action.
It should be noted that, in determining the safest course of action, troubleshooting,
i.e., taking steps beyond published non-normal checklist steps, may cause further
loss of system function or system failure. Troubleshooting should only be
considered when completion of the published non-normal checklist results in an
unacceptable situation.
There are some situations where the flight crew must land at the nearest suitable
airport. These situations include, but are not limited to, conditions where:
• the non–normal checklist includes the item “Plan to land at the nearest
suitable airport.”
• fire or smoke continues
• only one AC power source remains (engine or APU generator)
• only one hydraulic system remains (the standby system is considered a
hydraulic system)
• any other situation determined by the flight crew to have a significant
adverse effect on safety if the flight is continued.
It must be stressed that for smoke that continues or a fire that cannot be positively
confirmed to be completely extinguished, the earliest possible descent, landing,
and evacuation must be done.
If a smoke, fire or fumes situation becomes uncontrollable, the flight crew should
consider an immediate landing. Immediate landing implies immediate diversion
to a runway. However, in a severe situation, the flight crew should consider an
overweight landing, a tailwind landing, an off-airport landing, or a ditching.
December 15, 2019
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