4 ways to disengage activated AP?
- Disengage switch on control yoke
- Disengage Bar
- AP CMD Button (respective)
- NORM STAB TRIM
How is C A/P powered when APP armed?
HOT BATT BUS
After takeoff selection of FLCH does what?
- Autothrottles will engage in CLB THR
- A/T FMA = N1
- FLCH pitch mode engaged
- Pitches for MCP airspeed
What modes can be ARMED prior to becoming active and what’s unique about how they can be disarmed?
- LNAV
- LOC
- APP
Pushing switch before becoming active will DISARM
If APP is ARMED and LOC/GS captured, how can APP mode be canceled?
- Disengage AP + Turn OFF both FDs
- Go-Around selected
MCP THR MODE selects?
Sets N1 to THR REF
and
Snap Shot of PPOS taken from FMC when pressed after takeoff.
FLCH during CLIMB (THR + Pitch)?
- A/T advances thrust to max of the selected mode reference thrust (CLB/CLB1/CLB2)
- AFDS pitches for selected speed
FLCH during descent (THR + Pitch)?
- Descent planned for MCP ALT in 2 mins
else:
- A/T sets idle thrust
- AFDS pitches to hold selected IAS
LNAV capture criteria?
- A/C will capture LNAV if within 2.5NM of active route segment, regardless of HDG
- If more than 2.5NM, A/C must be on intercept HDG and able to capture segment before the active waypoint.
ALL CAT II and CAT III APPs must terminate?
Flown by?
Recommended flaps?
with AUTOLAND or MAP
CAPT only LAND
FLAPS 30 recommended for sight picture
Once APP commenced, can it be continued if required RVR drops below MINS?
CAT3 = YES
CAT2 = YES, provided proper visual cues are in sight by the DA(H)
When will ASA display LAND2/LAND3?
When descending through 1,500’
FAIL OPERATIONAL vs FAIL PASSIVE
*See image below…
FLARE(FMA) + Thrust Idle + ROLLOUT(FMA) engaged during AUTOLAND sequence?
FLARE = 50’ RA
THR IDLE = 25’ RA
ROLLOUT = 5’ RA
CAT1 or better AUTOLAND?
Must advice ATC to ensure ILS critical area is clear and protected.
IRU ALIGN panel light?
STEADY/FLASHING/OFF
STEADY LIGHT:
- IRU is aligning
- IRU is in ATT mode
- IRU is shutting down
FLASHING LIGHT:
- Bad position entered
- PRES POS missing
- A/C moved during alignment
EXTINGUISHED LIGHT:
- ALIGN complete
- IRU not in align mode
IRU ATT Mode operations?
IRU enters ALIGN mode for 30 seconds.
- A/C should maintain straight and level
- re-levels system and provides ATT reference
IRU ON DC panel light?
IRU DC FAIL panel light?
ON DC:
- AC PWR LOST and DC PWR being used
- EICAS CAUTION: IRS ON DC
- Horn sounds on GND (nose wheel well)
DC FAIL:
- DC PWR is lost while AC PWR is being used
IRU FAULT panel light?
Fault detected
EICAS CAUTION: IRS FAULT
IRU selector to NAV? Required?
- Initiates 10 minute alignment process.
- PRES POS must be entered via FMC/IRS Panel:
- FMC GPS POS
- FMC LAST POS
- FMC APT REF POS
- Required if more than 18 hours since last FULL ALIGN
IRU High Altitude Alignment Sequence?
- IRUs selected to ALIGN (minimum 17 MINS)
- PRES POS entered
- IRUs selected to NAV
*Ops between 70 and 78 degrees
IRU Fast Alignment Sequence?
- A/C stationary
- IRUs selected to ALIGN
- Enter PRES POS
- IRUs selected to NAV
- Takes 30 seconds (removes errors + updates POS)
<em>Full Align required if leg will exceed 18 hours from last full alignment of system</em>
IRU Power Sources?
Primary and Backup
PRIMARY = AC POWER
- L = L AC XFER
- R = R AC
- C = C AC
BACKUP = DC MAIN BATT BUS
- R IRU for 5 mins only
- shed to save battery power
Only information available with IRU in ATT mode?
HDG + ATT
ATT:
- fly straight + level for 30 sec
HDG:
- enter MAG HDG through IRS panel or POS INIT page of CDU
