Where does CRM stop?
Fortunately, and according to some of the oft repeated harebrained CC ideas...firmly at the reinforced FD door.
Night flights are a perfect example, as Rainboe correctly pointed out.
Some CC really do believe they 'know the score'...sadly, very few do.
A perfect example;
B747, after landing Cairo, circa 1987.
The number two Roller began to wind down after thrust reverse cancellation, whereupon slight aft end torching was noticed.
A small tail pipe fire.
Flight deck crew was notified by the tower, and provided the appropriate drill.
Case closed.
It was only later, that a CC member mentioned to her supervisor that she tried, without contacting the FD via interphone, to start an evac, because she noticed...'flames from the engine.'
That evac, had it been successful, would have been from the L4 door...right in line with the number two engine.
The reason the evac was not started?
The poor CC broke her fingernail trying to break the copper safety wire on the evac signal cover.
Manager flying, was advised.
Word came down...get rid of this particular uninformed CC, pronto.
Exit via duely issued.
Then, even stonger copper safety wire was fitted to the evac signal cover, just as a precaution...to keep CC from making complete fools of themselves, and endangering SLF, who might follow the CC harebrained, misinformed, untimely 'instructions'.