Warning Systems -System Description 737 Flight Crew Operations Manual
Resolution Advisory Aurals
The following table identifies the possible callouts associated with RAs and the vertical restrictions or maneuver recommended in each case.
YA721 - YA803
AURAL ALERTS VERTICAL RESTRICTIONS/MANEUVER
MONITOR VERTICAL SPEED, MONITOR VERTICAL SPEED Present pitch attitude is outside the RA pitch command area. Keep pitch attitude away from red area.
CLIMB, CLIMB, CLIMB Climb at the displayed pitch
DESCEND, DESCEND, DESCEND Descend at the displayed pitch
REDUCE CLIMB, REDUCE CLIMB Reduce climb rate
REDUCE DESCENT, REDUCE DESCENT Reduce descent rate
CLIMB, CROSSING CLIMB, CLIMB, CROSSING CLIMB Climb at displayed pitch. Airplane climbs through traffic’s altitude.
DESCEND, CROSSING DESCEND DESCEND, CROSSING DESCEND Descend at displayed pitch. Airplane descends through traffic’s altitude.
INCREASE CLIMB, INCREASE CLIMB Increase climb rate from initial pitch attitude.
INCREASE DESCENT, INCREASE DESCENT Increase descent rate from initial pitch attitude.
CLIMB – CLIMB NOW, CLIMB – CLIMB NOW Reversal maneuver from initial descent RA.
DESCEND – DESCEND NOW, DESCEND – DESCEND NOW Reversal maneuver from initial climb RA.
CLEAR OF CONFLICT RA encounter terminated. Maneuver guidance no longer displayed.
Copyright . The Boeing Company. See title page for details.
June 1, 2003 15.20.21
Warning Systems -System Description 737 Flight Crew Operations Manual
YA613 - YA687, YA809 - YK104
AURAL ALERTS VERTICAL RESTRICTIONS/MANEUVER
MONITOR VERTICAL SPEED Present pitch attitude is outside the RA pitch command area. Keep pitch attitude away from red area.
MAINTAIN VERTICAL SPEED, MAINTAIN
MAINTAIN VERTICAL SPEED, CROSSING MAINTAIN
CLIMB, CLIMB Climb at the displayed pitch
DESCEND, DESCEND Descend at the displayed pitch
ADJUST VERTICAL SPEED, ADJUST Reduce climb or descent rate
CLIMB, CROSSING CLIMB, CLIMB, CROSSING CLIMB Climb at displayed pitch. Airplane climbs through traffic’s altitude.
DESCEND, CROSSING DESCEND DESCEND, CROSSING DESCEND Descend at displayed pitch. Airplane descends through traffic’s altitude.
INCREASE CLIMB, INCREASE CLIMB Increase climb rate from initial pitch attitude.
INCREASE DESCENT, INCREASE DESCENT Increase descent rate from initial pitch attitude.
CLIMB – CLIMB NOW, CLIMB – CLIMB NOW Reversal maneuver from initial descent RA.
DESCEND – DESCEND NOW, DESCEND – DESCEND NOW Reversal maneuver from initial climb RA.
CLEAR OF CONFLICT RA encounter terminated. Maneuver guidance no longer displayed.
Tail Skid YC153 - YK104
The tail skid assembly consists of a cartridge assembly, tail skid, fairing (skirt) and shoe. The fairing provides an enclosure for the actual tail skid structure. The shoe is fitted to the bottom of the fairing.
Copyright . The Boeing Company. See title page for details.
15.20.22 March 29, 2004
Warning Systems -System Description
737 Flight Crew Operations Manual
The cartridge assembly consists of a crushable honeycomb material. When the tail skid strikes the runway the skid moves upward and the honeycomb material crushes. The tail skid is serviceable when the cartridge warning decal shows both green and red. The green disappears gradually as the cartridge is crushed. When the warning decal is all red, the cartridge must be replaced.
The shoe is what contacts the runway in the event of an over rotation. The shoe surface displays “wear dimples” which serve as a reference for shoe replacement.
Tail Skid Detail
REAR OF SKIRT
(LOOKING FWD)
FULL RED INDICATES CARTRIDGE CARTRIDGE IS USABLE. NEEDS TO BE REPLACED. .
VISIBLE GREEN INDICATES
Copyright . The Boeing Company. See title page for details.
September 29, 2005 15.20.23
Warning Systems -System Description 737 Flight Crew Operations Manual
Intentionally
Blank
Copyright . The Boeing Company. See title page for details.
15.20.24 June 1, 2003
