Landing gear will not retract

[Ernie Martin]

Could be many things. Do a "Search" (top of page) with "gear", "retract", etc. for some ideas. But very, very often it's a weak battery. A cheap first try is to check that the battery is good, then charge the battery overnight, then try it. Surprisingly, even with two good alternators and even if the battery starts both engines OK, if the battery is weak, then the doors will open but gear won't retract. Has happened to me several times. And, based on this message board, it has happened to others.

Ernie