Originally Posted by
DAL4EVER
Agree. Its been awhile so my system knowledge on it is fuzzy but I flew it for 10 years and can't think of a reason why B pumps on would matter for the gear doors. 3B is always on and 2A is always on so why would it matter for other B pumps except for redundancy?
This is correct except with certain mechnical failures.
The only time to put the 3B pump on to assist the gear door is if you needed the gear down before any flaps were selected. Proved several times that it was very possible to do 250 to the marker in the CRJ-200. Fun airplane!