Pack Trip Off
 

Hi To all

I have a funny snag that occured with my B737-200 the other day. While on the ground, the crew was operating with the R/H pack "on" and the L/H pack "off", when suddenly they got a pack trip off on the L/H.

I've seen high ACM outlet trips on the ground due to leakage through trim air check valves (B747-200/300) specifically. Possible ?

i seem to remember that the APU ducting is included in the left duct overheat system. this would cause a pack trip if triggered...a long time ago now so i could be wrong!!:ok:

I had the aircraft today , and I got it wrong. They operate L/H pack on ground and the R/H pack got a trip off without even being on. In flight all systems work properly. I even had this scenario with both packs "off", I got a double pack trip off. The APU is running at the time. The only way I could reset packs was to pull ovht cb behind F/O's seat and operate pack for a few seconds. Weird snag if you ask me.