737 Operations Manual
Non-Normal Checklists -
Unannunciated
Copyright © The Boeing Company. See title page for details.
D6-27370-400E-TBCE NNC.0.3
AIRSPEED UNRELIABLE
Condition: Pitch attitude not consistent with existing phase of
flight, altitude, thrust, and weight, or noise and/or low
frequency buffeting.
Crosscheck ground speed and winds provided by the IRS
and FMC to determine airspeed accuracy if indicated
airspeed is questionable.
Note: Erroneous or unreliable airspeed indications may be
caused by blocked or frozen pitot-static system(s), or
a severely damaged or missing radome.
AIRPLANE ATTITUDE/THRUST. . . . . . . . . . . . . . . . . . ADJUST
Maintain airplane control. Attitude and thrust information
is provided in the Performance-Inflight section.
PITOT STATIC HEAT. . . . . . . . . . . . . . . . . . . . . . . . .CHECK ON
MACH/AIRSPEED INDICATORS . . . . . . . . . . . CROSS CHECK
June 07, 2002
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