Fail-operational, 737NG
Thread Starter
Joined: Jul 2006
Posts: 123
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From: Norway
Fail-operational, 737NG
Hello chaps
I have a question specifically regarding the 737 fail-operational status.
Since we have only two autopilots, what makes the system triple redundant and hence fail-operational?
Cheers
I have a question specifically regarding the 737 fail-operational status.
Since we have only two autopilots, what makes the system triple redundant and hence fail-operational?
Cheers
Joined: Sep 2003
Posts: 42
Likes: 0
From: not Bungendore
Joined: Jan 2006
Aviation Qualifications: CPL
Posts: 1,410
Likes: 46
From: Between a rock and a hard place
Extract from CS-AWO:
(4) Fail-operational Automatic Landing System: An automatic landing system is fail-operational if, in the event of a failure, the approach, flare and landing can be completed by the remaining part of the automatic system. In the event of a failure, the automatic landing system will operate as a fail-passive system.
The following are typical arrangements:
(i) Two monitored automatic pilots, one remaining operative after a failure.
(ii) Three automatic pilots, two remaining operative (to permit comparison and provide necessary failure detection and protection) after a failure.
Apparently you can receive fail-operational status with two monitored autopilots. But what a monitored autopilot is, I'am clueless
(4) Fail-operational Automatic Landing System: An automatic landing system is fail-operational if, in the event of a failure, the approach, flare and landing can be completed by the remaining part of the automatic system. In the event of a failure, the automatic landing system will operate as a fail-passive system.
The following are typical arrangements:
(i) Two monitored automatic pilots, one remaining operative after a failure.
(ii) Three automatic pilots, two remaining operative (to permit comparison and provide necessary failure detection and protection) after a failure.
Apparently you can receive fail-operational status with two monitored autopilots. But what a monitored autopilot is, I'am clueless
