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It should be stressed that for persistent smoke or a fire that cannot be positively
confirmed to be completely extinguished, the earliest possible descent, landing,
and passenger evacuation should be accomplished.
Checklists prescribing an engine shutdown must be evaluated by the captain to
ascertain whether an actual shutdown or operation at reduced thrust is the safest
course of action. Consideration must be given to probable effects if the engine is
left running at minimum required thrust.
There are no non-normal checklists associated with the loss of an engine
indication. Operate the engine normally unless a limit is exceeded.
Non-normal checklists also assume:
• After engine start and prior to takeoff, the appropriate non-normal
checklist is accomplished if a non-normal condition is identified. Upon
completion of the checklist, the Dispatch Deviation Guide or airline
equivalent is consulted to determine if Minimum Equipment List relief is
available.
• System controls are in the normal configuration for the phase of flight
prior to the initiation of the non-normal checklists.
• Aural alerts are silenced and the system reset by the flight crew as soon as
the cause of the alert is recognized.
June 4, 2004
737 Flight Crew Operations Manual
Checklist Introduction -
Non-Normal Checklists
Copyright © The Boeing Company. See title page for details.
 CI.2.3
• The EMERGENCY position of the oxygen regulator is used when
necessary to provide positive pressure in the masks and goggles to
evacuate contaminants. The 100% position of the oxygen regulator is
used when positive pressure is not required, but contamination of flight
deck air exists. The NORMAL position of the oxygen regulator is used if
prolonged use is required and the situation permits. Normal boom mic
operation is restored when oxygen use is no longer required.
• Indicator lights should be tested to verify suspected faults.
• Flight crew reset of tripped fuel pump and fuel pump control circuit
breakers in flight is prohibited. Reset of any other tripped circuit breaker
is not recommended, unless in the judgment of the captain, the situation
resulting from the circuit breaker trip has a significant adverse effect on
safety. These other tripped circuit breakers may be reset once, after a short
cooling period (approximately 2 minutes). A ground reset of a tripped
circuit breaker by the flight crew should only be accomplished after
maintenance has determined it is safe to reset the circuit breaker.
• Flight crew cycling (pulling and resetting) of circuit breakers to clear
non-normal conditions is not recommended.
After engine start and prior to takeoff, illumination of Master Caution annunciator
lights or red and amber caution lights require completion of the appropriate
non-normal checklist. In certain cases, amber system monitor lights illuminate
during the Master Caution Light recall to inform the flight crew of a failure of one
element in a redundant system. If system operation is maintained by a second
element, the amber system monitor light will extinguish when the Master Caution
Light is reset. In these situations, the amber caution light alerts the flight crew to
the fact that normal system operation will be affected if another element failure
occurs. If an amber caution light illuminates during recall, but extinguishes on
Master Caution reset, completion of the non-normal checklist is not required.
Each air carrier has responsibility for establishing flight crew procedures in the
event of a system failure after the aircraft has departed the gate or the parking area
for the purpose of takeoff.
Non-Normal Checklist Use
Non-normal checklist use commences when the airplane flight path and
configuration are properly established. Only a few situations require an immediate
response (such as stall warning, ground proximity PULL UP and WINDSHEAR
warnings, and rejected takeoff). Usually, time is available to assess the situation
before corrective action is initiated. All actions should then be coordinated under
the captain's supervision and performed in a deliberate, systematic manner. Flight
path control should never be compromised.
December 5, 2003
737 Flight Crew Operations Manual
Checklist Introduction -
Non-Normal Checklists
Copyright © The Boeing Company. See title page for details.
CI.2.4
When a non-normal situation is evident, at the direction of the pilot flying, both
crew members systematically and without delay accomplish all recall items in
their areas of responsibility.
The pilot flying calls for the checklist when:
　
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