All Fleets Flashcards
ATC Datalink Emergency Report Abnormality:
- Issue when putting in souls on board and fuel remaining 30-59min, causes corruption of data.
- Use Voice Procedures
Erroneous AFDS Guidance when ILS interference:
- Incorrect Pitch when GS capture and there is interference
- AC may pitch up suddenly if on false GS
- AP will:
- Change to Attitude Stabilising mode based on attitude at time of interference
- This could result in low pitch attitude and High ROD if interference occurred at caputre
- No pilot indication for _ Then:
- > 200’ RA
- GS stabilised mode 15 sec
- Loc Stabilised mode 20 sec
- <200’ RA
- GS & Loc stabilised mode 4 sec
- > 200’ RA
- AUTOPILOT Msg
- FD Bars Removed
- Amber line through Mode
- Change to Attitude Stabilising mode based on attitude at time of interference
- If you disconnect AP All modes and FD return but:
- Guidance is still in Stabilised Mode and will not capture GS/LOC without intervention
- This can lead to High ROD and unstable
- Go Around or Continue Visually
- LAND 2/3 do not indicate ILS tracking only landing capability
- Cross Check Raw data
- Go Around if unstable
LNAV Path deviation from published procedure
- SID with waypoints close together than 10nm and/or turns is more than 120 deg (eg downwind leg) and large speed change between legs FMC will calc a smooth turn and not follow published path.
- If ATC gives unrestricted climb and you delete alt restrictions FMC will recalc LNAV path based on new speeds and crossing alt.
- It can also occur due to design on SID with no input
- Can occur on STAR
- Procedure:
- Preflight if close waypoints and 120 deg turn ND shows wrong path
- Enter a lower climb speed in VNAV CLB Page or a waypoint speed constraint in LEGS
- At High Weights delay flap retraction
- Preflight if close waypoints and 120 deg turn ND shows wrong path
Decent and Go Round Procedure Changes
- Flight Crew awareness of thrust during a go round
- TOGA System
- TOGA is inhibited near and on the ground.
- If TOGA is pushed no thrust lever movement
- Pilot Actions
- Brief Thrust in Descent Briefing
- Push TOGA
- Manually Increase Thrust
- PM to Verify Thrust and manually correct if required
BP 4
Anomalous Takeoff Stab Trim Behaviour
Stab Trim changes outside Green Band or Blanks
Results in Config warning at TO
- At low Weight (240T) use assumed temp with TO2 only or don’t use assumed temp
- Before Departure verify Stab Trim is correct and in the Green Band
- If Trim has change/No Green Band/Outside Band. Delete CG and re-enter and set trim
BP 4
Lower Than Expected VNAV Target Speed
Caused by speed constraint in an approach or Hold being being applied to ac in current position
- Legs and Commanded speed will be incorrect speed but VNAV page will have correct speed
- Can occur after TO
- Insufficient fuel may occur
- When selecting an Approach or Inserting Hold Speed when an approach is already selected
Before Exe confirm there are not Legs Speed changes
If there are:
- Note and delete hold speed for all holds
- Note and delete all missed approach speed constrains
- Re enter missed approach speed constrains
- Exe
-Use Speed Intervention to fly hold
If Already EXE
- Speed intervention
- Do above steps
BP 4
Offset Route does Not Parallel Original
Offset diverges from Original Route if an approach has been loaded.
LNAV follows wrong route
FMC modifications can result in Dual FMC reset
Before EXE check the route
If Offset not parallel:
- Erase
- Route Page and Delete the approach and EXE
- Select Offset, check and Execute
- Enter Approach
If Already EXE:
- Route Page and delete Approach and EXE
- Enter Perf Data
- Enter Offset, check and exe
- Reenter Approach
BP 4
Dual FMC Rest for Unknown reason
Dual FMC reset (90 sec)
- Verify Route Data on Legs
- Activate and Exe
- Enter Perf Data and Exe
- Re engage AT and LNAV / VANV
BP 4
ALTN Page Fails to Update
- No update to Airport or Predictions (normally every 5 min)
- Enter manual Airports, allow time to update and check predictions
BP 4
Un-commanded Level Off & Thrust Reduction in VNAV during Departure
THR REF to VNAV SPD/PATH as low as 400’AGL and level off
Caused by Data from last flight and only affects uplinked routes
- Cycle Nav Database during FMC Setup
- If occurs use another mode like FLCH / TOGA
BP 4
Unresponsive ATC LOGON/STATUS
Tail No, Flt No, Origin, Dest missing or it freezes
Actions:
If not accepting data:
- Move FMC selector to other position
- If accepting data more selector back
- Reengage AT
If Origin/Dest missing
- Route copy to route 2
- Load route 2
- Reengage AT
- Logon
If Flight Info Missing
- Route page, change Flight number then change back again
If Tail no missing
- Re enter tail no
- If not accepted switch FMC as above
- If not accepted again, load route 2 as above
BP 4
Loss Of V Speeds during TO:
FMC Take off page displayed for TO and V2 set on MCP
- If Speeds deleted PM call V1 and Vr ( if unable to remember rotate 5-10 before V2)
BP 4
Target Speed not Adjusting for Eng Fail Takeoff:
- Maintain V2 to V2+20 until acceleration hight
BP 4
V Speed not Calc Based on ASTM after FMC cycling
CDU thrust lim, Takeoff Reg page and Primary Eng indications all show previous data
- After cycle FMC database on set up ensure all stale ASTM data deleted
BP 4
ALTN Airport ETA & Fuel Incorrect
- Do Not Use ALTN page for fuel predictions
BP 4
VNAV Engagement at 100kt During TO
- TOGA to VNAV SPD at 100kts occurs after flight plan swaps and FMC selector swaps
- Keep FMC selector in L for all departures
- If occurs fly V2 - V2+20 until acc alt
BP 4
Discrepancy between ATC LOG and Actual ATC Request for Mach msg
Mach speed incorrectly rounded on Log and printed msg
- ATC Uplink Msg correct do not rely on Log Msg or printed msg
