Topic Author
Posts: 151
Joined: Fri Feb 23, 2001 10:26 pm

How Is It Possible?

Wed Sep 12, 2001 12:53 pm

Last week during preflight checks of B747-300, I noted that Pax Oxygen pr was low. I sent tech to change the bottle(s) with low pr. He later on told me that three out of five bottles were having pr of 1100 psi each and rest of the two were having 2000 psi each. Going through previous tech logs, I noticed same three bottles getting replaced almost fortnightly. Question is if there is leakage in the system why all five bottles r not getting depleted , being in parallel ? Why these three ? Anyone out there to help me out ...
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: How Is It Possible?

Wed Sep 12, 2001 6:30 pm

I don't know the -300, but suspect a check valve somewhere in the system.
Topic Author
Posts: 151
Joined: Fri Feb 23, 2001 10:26 pm

RE: How Is It Possible?

Wed Sep 12, 2001 10:02 pm

As such there is no check vlv in the sys.

Who is online

Users browsing this forum: mat66 and 4 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos