Originally Posted by
Ben_S
The wiring was compliant when the NG was certified wasn't it? It wasn't when the Max was certified. Thats the difference.It may be safe as is, but it doesn't meet the requirements, Boeing should have known this and not cut corners, but well, Boeing.
I assume the wiring is for control of the trim.. And a wiring fault can result in two failure modes:
Electrical trim not working, or
Uncommanded trim runaway, maybe even preventing trim cut-out switches from working.
How is CFR25.671 to be affecting the certification of the MAX in light of the control forces in case of runaway, and the requirement of
"without requiring exceptional piloting skill or strength" ?
If thehazard analysis of a fault in the electrical trim has changed from e.g.
Minor to
Hazardous, then this may also drive new requirements for probability of malfunction, fault detection, fault insulation, and redundancy in the manual trim.