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CRJ APU Reliability

UAL Bagsmasher From United States of America, joined Sep 1999, 2130 posts, RR: 11
Posted (8 years 4 months 1 week 6 days 16 hours ago) and read 2188 times:

Does anyone know why we've had to change out 5 APU's in as many weeks at work over the past month or so? They seem to be dropping like flies. One seized, another had something let go inside and overtemped, and so on. Could any of these failures be related to glycol ingestion? Or are we just having a string of bad luck? We didn't have any APUs crap out for the four months prior to December. Last month is when everything started happening. The crews are asking if it's something they are doing, but they swear they don't put a pneumatic load on for 2 minutes after start up. Any ideas?

7 replies: All unread, jump to last

J32driver From United States of America, joined May 2000, 399 posts, RR: 1
Reply 1, posted (8 years 4 months 1 week 6 days 13 hours ago) and read 2128 times:

Bagsmasher,

I think its just a run of bad luck. Not sure which Express carrier you work for, but there have been several RJ's running around with no APU at the carrier I fly at. I've had the pleasure of flying 2 of them over the last week. Both were APU door sensor problems... not a problem with the APU itself.

Aaron747 From Japan, joined Aug 2003, 7621 posts, RR: 28
Reply 2, posted (8 years 4 months 1 week 6 days 12 hours ago) and read 2117 times:

break out those airstart units and hide everybody!

If you need someone to blame / throw a rock in the air / you'll hit someone guilty

Lowrider From United States of America, joined Jun 2004, 3220 posts, RR: 11
Reply 3, posted (8 years 4 months 1 week 6 days 12 hours ago) and read 2112 times:

The APU on the CRJ is fairly reliable. If I had to guess, I would say it is over 97%. Every now and then, our fleet just seems to have collective fits, whether is the APU, packs, BTMS's, or autopilots. There will be a rash of deferals, then it will go away for a few months.

Proud OOTSK member

HAWK21M From India, joined Jan 2001, 31201 posts, RR: 58
Reply 4, posted (8 years 4 months 1 week 6 days 12 hours ago) and read 2111 times:

What were the Reasons stated when the APUs were replaced.Five in Five weeks seem a lot.
regds
MEL

Think of the brighter side!

StowAway From United States of America, joined Dec 2004, 640 posts, RR: 5
Reply 5, posted (8 years 4 months 1 week 6 days 11 hours ago) and read 2104 times:

Sorry if this has already been discussed, but why are the APUs on some CRJ 200's so damn loud?

A monkey's ass always talks crap.

Aaron747 From Japan, joined Aug 2003, 7621 posts, RR: 28
Reply 6, posted (8 years 4 months 1 week 6 days 8 hours ago) and read 2081 times:

that's nothing - you should hear an EMB-120 or 733 APU sometime.

If you need someone to blame / throw a rock in the air / you'll hit someone guilty

Efohdee From United States of America, joined Oct 2004, 214 posts, RR: 0
Reply 7, posted (8 years 4 months 1 week 4 days 12 hours ago) and read 1977 times:

WHAT??