Autoland

Question 1

What does No Autoland Annunciation mean?

Answer 1

Go Around

Question 2

What’s the only light on the Auto land annunciation that can illuminate below 200’?

Answer 2

No Autoland

Question 3

Can a No Land 3 Annunciation be illuminated on climb out or in cruise?

Answer 3

Yes.
Boeing logic is always checking system

Question 4

With weather conditions at Land 2 minimums, completing a Land 3 and the status changes to Land 2 No Land 3, can we continue?

Answer 4

Only if briefed or visual

Question 5

Selecting APP does what?

Answer 5

Arms GS/LOC
Energise all 3 autopilots
Isolates Electrical system for 3 AP approach

Question 6

When on an autoland app, how do the AC Bus Tie Breakers work?

Answer 6

Between 1500 and 200 bus tie breakers work normally to cross power the AC buses in the event of a Bus failure

Question 7

Land 2 Go Around decision is made, what is the Autoland status?

Answer 7

Blank, No Land 3

Question 8

Land 2 Go Around decision is made, what is the number of Auto Pilots working?

Answer 8

Stays with the same until 400’ and new roll mode is selected

Question 9

Land 2 Go Around decision is made, above 400’ how many autopilots are working?

Answer 9

Reverts to single autopilot operation with roll mode selected

Question 10

Below 200’ with failure of the Left Main AC Bus, why don’t we lose Centre Autopilot and Captains instruments?

Answer 10

C Autopilot powered by C AC Bus thru the Hot Battery Bus
Captains Flight Instrument Transfer Bus closes in Non Normal to provide power
Land 3 remains annunciation

Question 11

Why do we select the Centre autopilot on take off?

Answer 11

Centre autopilot utilises the L+C HYD system for primary flight controls

Question 12

For Land 3, what do we need to ensure is running for every approach?

Answer 12

APU