Originally Posted by
eng3
As for the 90 second test, I've wondered if it is redone when seating layouts are changed (more seats, more people). It doesnt sound like it.
The evacuation test establishes the MAXIMUM number of seats that may be installed in the aircraft. This would typically be a tight, all coach seats configuration. The actual cabin design is restricted to that certification limit and the seats themselves must comply with any other applicable regulatory requirements.
Originally Posted by
bocastephen
Ridiculously too long - not sure why the FAA allows airlines to do these nonsensical theatrical productions.
They allow them because they comply with
14 CFR 121.571. If the FAA determines that the briefings should be further restricted, they would have to change that regulation, which they have the power to do.