Ethiopian Prelim Report
Hi all
Have had a look at the report, if I've missed anything/misunderstood very happy to be corrected.
It appears thigs were "contained" until the last 30 seconds when it all fell apart, attitude of -40 degrees was reached and recovery impossible.
Thing I can't work out is that previously the STAB TRIM switches were moved to cutoff and verified no electric trim was available, also manual trimming was attempted but unsuccessful (high aerodynamic forces?)
In the last 30 seconds there was electric manual trim followed by severe automatic nose down trim - with the STAB TRIM switches in cutoff?
Can only think of 3 options:
- STAB TRIM override switch engaged..but that only allows manual trim in direction opposite to control column forces?
Equally did not see any mention of the override being engaged;
- STAB TRIM switches were returned to normal position/operation;
- an electrical fault that allowed the system to be energised regardless of the STAB TRIM switches position.
Thoughts appreciated.