Originally Posted by
Takwis
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That's it. NO MENTION OF ANY CHANGES TO TRIM, TRIM SWITCHES, TRIM SWITCH LABELS OR FUNCTIONS. Or MCAS.
Thank you.
That and the CYA updated runaway trim procedure that appears to have been written to support the claim that Lion Air was could have been prevented had existing procedures been followed is depressing.
For the 'just follow the procedures" crew; what would have been the likely outcome in ET if a new 'MCAS runaway' checklist had been published instead with specific instructions, I am sure Boeing engineers/test pilots could provide a much better one.
Condition:
ND trim in increment of up to 10 seconds, repeated after pilot trim inputs.
MCAS may be the cause, only when manual flying no flaps.
Action:
Fully trim the aircraft.
Note: if either trim switch is 'blipped' MCAS will be disabled for 5 seconds.
This can be used while fine tuning trim, use alternate up/down trim inputs every 3 seconds.
Once trimmed disable electrical trim.
Land and file a full tech report. (One hopes not needed but Lion Air comes to mind)