PPRuNe Forums - View Single Post - Air Asia Indonesia Lost Contact from Surabaya to Singapore
Old 1st Dec 2015, 23:56
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Midland63
 
Join Date: Jan 2006
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Would the pro's mind taking a question from an SLF to aid his understanding?

Is the following a reasonable summary of what happened:-

To bring the FACs back online after having had their CBs pulled, it was necessary as well as re-setting the CBs to cycle their on-off switches. As the latter wasn't done, they didn't come back online and, absent both FACs, the a/c dropped from Normal to Alternate Law (i.e. fewer protections) and the A/P and A/T dropped out. This [what exactly and why?] caused a 2 degree deflection of the rudder which provoked a roll to the left which the FO (PF) didn't notice until it had got to 54 degrees. He responded with right and back stick, the latter to retrieve the altitude lost during the unprotected roll. Except he never seemed to release the backward pressure on the stick which caused the a/c to stall. It's possible the Capt realised the FO's error but, if he did, for some reason never affirmatively siezed control of the a/c from the FO who continued to apply back stick during the following 5 minutes until the a/c hit the water.

If that's roughly correct, then it looks to my untutored eye horrifyingly like AF447 repeating itself.

Also, is there an irony that the absence of an RTLU caused the loss of AA587 whereas the presence of one caused the loss of QZ8501?
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