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· CWS R (roll mode engaged in CWS)
· 1 CH (for single A/P ILS approach, annunciates after localizer capture and
remains on for entire approach. For dual A/P ILS approach, annunciates
after localizer capture and extinguishes after pitch monitor confidence test
is successfully completed).
AUTO FLIGHT
737 Sec. 6.4 Page 5
Flight Manual Continental Rev. 11/15/02 #41
AFDS Flight Mode Annunciations
The flight mode annunciations are displayed just above the attitude indicator.
The mode annunciations, from left to right, are:
· Autothrottle
· Pitch
· Roll.
Engaged or captured modes are shown at the top of the flight mode annunciation
boxes in large green letters. Armed modes are shown in smaller white letters at
the bottom of the flight mode annunciation boxes.
Autothrottle Modes
· N1 – The autothrottle maintains thrust at the selected N1 limit displayed on
the thrust mode display
· GA – The autothrottle maintains thrust at reduced go-around setting or full
go-around N1 limit
· RETARD – Displayed while autothrottle moves thrust levers to the aft stop.
RETARD mode is followed by ARM mode
· FMC SPD – The autothrottle maintains speed commanded by the FMC. The
autothrottle is limited to the N1 value shown on the thrust mode display
· MCP SPD – The autothrottle maintains speed set in the MCP IAS/MACH
display. The autothrottle is limited to the N1 value shown on the thrust
mode display
· THR HLD – The thrust lever autothrottle servos are inhibited; the pilot can set
the thrust levers manually
· ARM – No autothrottle mode engaged. The thrust lever autothrottle servos
are inhibited; the pilot can set thrust levers manually.
AUTO FLIGHT
Sec. 6.4 Page 6 737
Rev. 11/15/02 #41 Continental Flight Manual
Pitch Modes
· TO/GA – Takeoff (Flight Director Only)
Engaged for takeoff by turning both F/D switches ON and pushing either
TO/GA switch. Both F/Ds must be ON to engage TO/GA prior to starting
takeoff.
The AFDS commands pitch attitude in the following order:
· 10 degrees nose down until 60 knots IAS
· 15 degrees nose up after 60 knots IAS
· 15 degrees nose up after lift–off until a sufficient climb rate is
acquired. Then, pitch is commanded to maintain MCP speed plus 20
knots.
· TO/GA can also be engaged for takeoff with F/D switches OFF if a TO/GA
switch is pushed after 80 knots IAS below 2000 feet AGL and prior to
150 seconds after lift-off.
· TO/GA – Go-around
Engaged for go-around by pushing the TO/GA switch under the following
conditions:
· Inflight below 2000 feet radio altitude
· Not in takeoff mode
· Either F/D ON or OFF.
The F/Ds command 15 degrees nose up pitch and roll to hold the
approach ground track at time of go-around engagement. After
reaching a programmed rate of climb, pitch commands the target
airspeed for each flap setting based on maximum takeoff weight
calculations.
AUTO FLIGHT
737 Sec. 6.4 Page 7
Flight Manual Continental Rev. 11/15/02 #41
· VNAV –
VNAV is engaged by pushing the VNAV switch. With a VNAV mode
engaged, the FMC commands AFDS pitch and A/T modes to fly the vertical
profile.
· VNAV SPD – The AFDS maintains the FMC speed displayed on the
airspeed indicator and/or the CDU CLIMB or DESCENT pages
· VNAV PTH – The AFDS maintains FMC altitude or descent path
with pitch commands.
· V/S (engaged) – Commands pitch to hold selected vertical speed
· V/S (armed) – V/S mode can be engaged by moving vertical speed
thumbwheel
· ALT ACQ – Transition maneuver entered automatically from a V/S, LVL
CHG, or VNAV climb or descent to selected MCP altitude. Engages but
does not annunciate during VNAV transition
· ALT HOLD – Commands pitch to hold MCP selected altitude or
uncorrected barometric altitude at which ALT HOLD switch was pushed
· MCP SPD – Pitch commands maintain IAS/MACH window airspeed or
Mach
· G/S (armed) – The AFDS is armed for G/S capture
· G/S (engaged) – The AFDS follows the ILS glideslope
· FLARE (armed) – During a dual A/P ILS approach, FLARE is displayed
after LOC and G/S capture and below 1500 feet RA. The second A/P
couples with the flight controls and A/P go-around mode arms
· FLARE (engaged) – During a dual A/P ILS approach, flare engages at 50
feet radio altitude. FLARE accomplishes the autoland flare maneuver.
　
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