Flight Director Switch

• on the ground with no Autopilot engaged and FD OFF, the first FD switch turned ON activates the FD in the TO mode.
• in flight with no autopilot engaged and FD OFF, turning the first FD switch ON engages the FD in V/S and HDG HOLD modes or, on some airplanes, V/S and ATT if bank angle is greater than 5°

ON -

• respective pilot's command bars appear and are positioned by the left, centre or right FCC (as selected with the Flight Director Source Selector Switch).
• on some airplanes command bars are not in view if the autopilot, corresponding to the FMC selected for the Flight Director, is engaged in CMD.
• command bars operate in current AFDS mode.

OFF -

• command bars disappear

Autothrottle Arm Switch

ARM -

• arms autothrottle system for mode selection
• autothrottle operates when EPR, SPD, VNAV, FLCH or GA switch pushed
• autothrottle operates when SPD switch pushed and pitch mode is ALT HOLD, V/S pr G/S

OFF - disconnects autothrottle and prevents autothrottle engagement

Engine Pressure Ratio (EPR) Switch

Push -

• selects autothrottle EPR mode
• EPR annunciates on each FMA
• autothrottle holds reference thrust value displayed on EICAS subject to maximum speed limits

As installed

• FMS runway position update when selected for takeoff with GPS updating inhibited

Speed (SPD) Switch

Push -

• selects autothrottle SPD mode
• SPD appears on each FMA
• autothrottle controls thrust to maintain IAS or MACH displayed in the speed window subject to minimum and maximum sped limits

Speed Window

• displays selected speed when IAS/MACH Selector is controlling command airspeed bugs.
• blank when FMCS is controlling command airspeed bugs.
• displays 200 kts when first powered on the ground.
• display range is: 100-399 kts, 0.4-0.95 mach.
• in climb changes from IAS to Mach at approximately .80 IMN.
• in descent changes from Mach to IAS at approximately 300 KIAS.

IAS/MACH Select Switch

PUSH -

• alternately changes Speed Window between present IAS and Mach if within indicator range.

IAS/Mach Selector

Push -

• when VNAV engaged, alternately changes Speed Window between current IAS or Mach and a blank display.
• window opens and speed control transfers from FMC target speed to IAS/MACH Selector.
• descending in VNAV PTH, pitch mode changes to VNAV SPD. Selected speed maintained by pitch until airplane intercepts an altitude constraint and VNAV PTH re-engages. Although, if on approach, pitch mode remains in VNAV PTH and autothrottle controls speed.

Rotate -

• not operative in Speed Window is blank.
• sets speed in Speed Window and positions command airspeed bugs.

Lateral Navigation Switch

PUSH - (bar in view) arms or engages AFDS in LNAV as follows:

• if the active route leg is beyond the turning radius of the airplane, LNAV annunciates white (armed) on each ADI. Previously engaged roll mode remains active. With LNAV armed and airplane not on a heading which intercepts the active leg the FMC MSG lights illuminate and "NOT ON INTERCEPT HEADING" appears in the scratch pad of both CDUs.
• if the active route leg is within the turning radius of the airplane, LNAV annunciates green (engaged) on each ADI. AFDS then follows the active route.
• LNAV mode is disengaged by selecting HDG HOLD or HDG SEL, or when localiser capture occurs.

Vertical Navigation Switch

PUSH - (bar in view)

• changes thrust reference from TO to CLB if above 400 ft RA (as installed).
• VNAV PTH or VNAV SPD appears on each ADI.
• AFDS and Autothrottle follow vertical path and thrust guidance from FMCS.

During climbs or descents, AFDS captures and holds altitude displayed in the Altitude Window or FMCS Target Altitude, whichever is reached first.

When in VNAV mode, pushing IAS/MACH Selector permits manual speed selection. FMCs then use manually selected speeds for speed control.

VNAV mode is disengaged by any one of the following:

• selecting VS
• selecting ALT HLD
• selecting SPD or EPR
• selecting FLCH
• in climb or descent, reaching altitude displayed in Altitude Window prior to reaching FMCs Target Altitude
• GS engagement
• Selecting GA

Flight Level Change Switch

PUSH - (bar in view)

• selects FLCH mode and sets Speed Window and command airspeed bugs to current airspeed.
• FLCH appears on both ADIs
• AFDS pitch holds existing airspeed and Autothrottle holds selected thrust for climb or idle thrust for descent. When selected altitude is reached, pitch mode changes to ALT HOLD and Autothrottle changes to SPD mode.
• with FLCH mode displayed, pushing switch resets Speed Window and command airspeed bugs to current airspeed.

Heading Window

• displays selected heading.
• HSI Selected Heading Markers are positioned to this value.
• indicator and markers initialise at 000 when power is first applied.
• automatically changes to selected ILS front course heading at LOC capture.

Heading Selector

ROTATE -

• sets heading in heading window.
• positions Selected Heading Marker on both HSIs.

Heading Select Switch

PUSH -

• HDG SEL appears on each ADI
• AFDS controls roll to acquire and hold heading shown in Heading Window and on HSI heading markers.
• bank is limited by Bank Limit Selector

Bank Limit Selector

ROTATE - sets AFDS commanded bank limit when in HDG SEL mode as follows:

• AUTO - bank angle limit varies from 25 to 15 degrees depending on TAS:

  • at slower airspeeds, the bank angle limit is 25°
  • as TAS increases, the bank angle limit decreases and at high TAS the limit is 15°
  
  
• 5, 10, 15, 20, 25 - selected value is maximum regardless of airspeed

Heading Hold Switch

PUSH - (bar in view)

• selects HDG HOLD mode.
• HDG HOLD appears on each ADI.
• AFDS commands wings level, then holds heading.

Vertical Speed Window

• displays selected vertical speed
• blank when V/S mode not engaged
• range is -8000 to +6000 fpm in 100 fpm increments

Vertical Speed Selector

UP/DN -

• sets vertical speed in Vertical Speed Window

Vertical Speed Switch

PUSH - (bar in view)

• V/S appears on each ADI
• engages V/S mode
• causes existing vertical speed to be displayed in Vertical Speed Window
• when a selected altitude is reached, pitch mode changes to ALT HOLD
• AFDS commands vertical speed displayed in Vertical Speed Window
• if AFDS is engaged in V/S from FLCH or from VNAV, autothrottle automatically engages in SPD mode, if armed

Altitude Window

• displays altitude in 100 ft increments. Range 0 to 50,000 ft.
• displayed altitude is reference altitude for altitude alerting and level off.
• indicator reads 10,000 ft when power is first applied.

Altitude Selector

ROTATE -

• sets altitude in altitude window

Altitude Hold Switch

PUSH - (bar in view)

• - engages ALT HOLD mode.
• - ALT HOLD appears on each EADI
• - AFDS commands altitude existing when switch is pushed

Backcourse Switch

(Must be used concurrently with LOC switch)

PUSH - (bar in view) arms or engages AFDS in B/CRS mode as follows:

• B/CRS appears white (armed) in each EADI prior to localiser capture. AFDS is armed to capture and track inbound on backcourse of localiser. Capture point varies based on range and intercept angle.

  Initial roll modes; LNAV, HDG SEL or HDG HOLD remain engaged until B/CRS capture.

  Before localiser capture, pushing the LOC switch a second time disarms both the LOC and B/CRS modes. Pushing only the B/CRS switch a second time, disarms the B/CRS mode but the LOC mode remains armed.

• B/CRS appears green (engaged) in each EADI after localiser capture. AFDS tracks inbound on backcourse.

  If the LOC switch is selected and localiser is captured before the B/CRS switch is pushed, AFDS will track the localiser front course (outbound) and B/CRS cannot be selected

• G/S. FLARE and ROLLOUT functions are not available.

Note: LOC and B/CRS modes are single autopilot functions only. Multiple autopilots cannot be engaged in these modes.

Localiser Switch

PUSH - (bar in view) arms or engages AFDS in LOC mode as follows:

• LOC appears white (armed) in each EADI prior to localiser capture. AFDS is armed to capture and track inbound on the front course. Capture point varies based on range and intercept angle.

  Initial roll modes; LNAV, HDG SEL or HDG HOLD remain engaged until LOC capture.

  Pushing the LOC switch a second time prior to localiser capture disarms the LOC mode.

• LOC appears green (engaged) in each EADI after localiser capture. AFDS tracks inbound front course

  LOC capture will not occur if intercept track angle exceeds 120°

• G/S. FLARE and ROLLOUT functions are not available.

Note: LOC and B/CRS modes are single autopilot functions only. Multiple autopilots cannot be engaged in these modes.

Approach Switch

PUSH - (bar in view) arms or engages AFDS in APP mode as follows:

• LOC and G/S appear white (armed) in each EADI prior to localiser and glideslope capture.
• LOC and G/S appear green (engaged) in each EADI after each one is captured.
• AFDS captures and tracks localiser as in LOC mode and captures glideslope upon interception. On some airplanes either localiser or glideslope can be captured first, on other airplanes the localiser must be captured before the glideslope can be captured.
• LOC capture can occur when intercept track angle is within 120° of localiser course.
• G/S capture can occur when intercept track angle is within 80° of localiser course.
• arms the other autopilot systems (CMD switch bars in view) for subsequent automatic engagement which occurs when localiser and glideslope are captured and radio altitude is below 1500 ft.
• A/P systems connected to separate power sources.

APP mode can be disengaged under the following conditions and actions:

• before LOC or G/S capture:
  • push APP second time or select other pitch or roll mode
• with LOC captured and G/S armed:
  • select other roll mode
• with G/S captured and LOC armed:
  • select other pitch mode
• after LOC and G/S captured:
  • engage GA mode or disengage autopilot and turn both Flight Directors OFF

Command Switches

PUSH - (bar in view)

• engages respective autopilot in CMD in active Flight Director mode(s) except TO and GA if either FD switch is ON. If both FD switches are OFF, autopilot engages in VS and HDG HOLD modes, or on some airplanes, VS and ATT if bank angle is greater than 5°
• CMD appears on both EADIs

Control Wheel Steering Switches

As Installed

Autopilot Disengage Bar

PUSH DOWN - (exposes amber stripe)

• disconnects all three autopilots from Flight Control Servos
• prevents autopilot engagement

LIFT UP - (conceals amber stripe)

• permits autopilot engagement