Yes. There is an interesting thread on the other forum about a LUAL Cap refusing to fly an airplane with a mechanical issue.

A LCAL Customer Service rep found out that the issue was MEL-able and blew a gasket and had words with the Captain. Then CS tried to recruit deadheading F/O on flight to fly the plane. Needless to say, that wasn't going to happen. Then, CS told DH F/O that refusing to fly a plane at CAL would get you fired. Then got on PA and told pax to be sure and thank the pilots for canceling their flight!!

Now, if this is all true, and this is the way business is conducted at CAL WRT to Captains authority, aircraft refusals and Customer Service Agents, then this is one hell of a pathetic story and it seems to me that there is a serious breach of Captains Authority at LCAL. Please tell me that this was an aberration and that I have it all wrong.

***This doesn't imply that LUAL doesn't have some Marvins who would willingly do a transcon single engine or something equally idiotic even though perfectly legal. But, they are few and far between and we generally don't tolerate this type of treatment from CS. And when a plane is refused, the Captain speaks to, and answers Flight Ops personnel, not CS. Additionally, he doesn't get fired if his reasoning is valid. There would also be serious repercussions for the CS agent.

As it stands now, I am very proud of our "culture" where even a lowly First Officer can refuse to fly an airplane.