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NNM.1.4
Terrain Avoidance
Ground Proximity Caution
Accomplish the following maneuver for any of these aural alerts:
• CAUTION TERRAIN
• TERRAIN AHEAD (JAA)
• SINK RATE
• TERRAIN, TERRAIN
• DON’T SINK
• TOO LOW FLAPS
• TOO LOW GEAR
• TOO LOW TERRAIN
• GLIDESLOPE
• BANK ANGLE
The below glideslope deviation alert may be cancelled or inhibited for:
• localizer or backcourse approach
• circling approach from an ILS
• when conditions require a deliberate approach below glideslope
• unreliable glideslope signal.
Note: If a terrain caution occurs when flying under daylight VMC, and positive
visual verification is made that no obstacle or terrain hazard exists, the alert
may be regarded as cautionary and the approach may be continued.
Continued on next page
Pilot Flying Pilot Not Flying
Correct the flight path or the airplane configuration.
June 4, 2004
737 Flight Crew Operations Manual
Non-Normal Maneuvers -
Non-Normal Maneuvers
Copyright © The Boeing Company. See title page for details.
NNM.1.5
Continued from previous page
Ground Proximity Warning
Accomplish the following maneuver for any of these conditions:
• Activation of the “PULL UP” or “TERRAIN TERRAIN PULL UP”
warning.
• Activation of the “TERRAIN AHEAD PULL UP” (JAA) warning.
• Other situations resulting in unacceptable flight toward terrain.
Note: Aft control column force increases as the airspeed decreases. In all cases,
the pitch attitude that results in intermittent stick shaker or initial buffet is
the upper pitch attitude limit. Flight at intermittent stick shaker may be
required to obtain a positive terrain separation. Smooth, steady control will
avoid a pitch attitude overshoot and stall.
Note: Do not use flight director commands.
Note: *Maximum thrust can be obtained by advancing the thrust levers to the
takeoff or go-around limit. If terrain contact is imminent, advance thrust
levers full forward.
Note: If positive visual verification is made that no obstacle or terrain hazard
exists when flying under daylight VMC conditions prior to a terrain or
obstacle warning, the alert may be regarded as cautionary and the approach
may be continued.
Pilot Flying Pilot Not Flying
Disconnect autopilot.
Disconnect autothrottle.
Aggressively apply maximum* thrust.
Simultaneously roll wings level and rotate
to an initial pitch attitude of 20.°
Retract speedbrakes
If terrain remains a threat, continue
rotation up to the pitch limit indicator (if
available) or stick shaker or initial buffet.
Assure maximum* thrust.
Verify all required actions have been
completed and call out any omissions.
Do not change gear or flap configuration
until terrain separation is assured.
Monitor radio altimeter for sustained or
increasing terrain separation.
When clear of terrain, slowly decrease
pitch attitude and accelerate.
Monitor vertical speed and altitude (radio
altitude for terrain clearance and
barometric altitude for a minimum safe
altitude.)
Call out any trend toward terrain contact.
June 4, 2004
737 Flight Crew Operations Manual
Non-Normal Maneuvers -
Non-Normal Maneuvers
Copyright © The Boeing Company. See title page for details.
NNM.1.6
Traffic Avoidance
Immediately accomplish the following by recall whenever a TCAS traffic
advisory (TA) or resolution advisory (RA) occurs.
WARNING: Comply with the RA if there is a conflict between the RA and
air traffic control.
WARNING: Once an RA has been issued, safe separation could be
compromised if current vertical speed is changed, except as
necessary to comply with the RA. This is because TCAS
II-to-TCAS II coordination may be in progress with the
intruder aircraft, and any change in vertical speed that does
not comply with the RA may negate the effectiveness of the
other aircraft’s compliance with the RA.
Note: If stick shaker or initial buffet occurs during the maneuver, immediately
accomplish the APPROACH TO STALL RECOVERY procedure.
Note: If high speed buffet occurs during the maneuver, relax pitch force as
necessary to reduce buffet, but continue the maneuver.
Note: On airplanes with integrated cue flight director, do not use flight director
commands until clear of conflict.
Note: On airplanes with split axis flight director, do not use flight director pitch
commands until clear of conflict.
For TA:
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