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

What Goes Wrong With The Generator?

Mon May 06, 2002 4:42 pm

The Maintenance Manual of B747 says that when u r going for a hi power run up, the generator must be on line or CSD be disconnected. My querry lies here. What goes wrong if it is not followed and WHY it happens so ?

To keep it going, I would like to furher add that once the generator got fire because of not taking it on line, definitely Gen field was closed and V & F were available. Same thing can be seconded by the Opn Mnl which says to disconnect CSD if Generator does not come on line for any reason. Big Question is why fire took place, definitely CSD oil level was ok.

One more thing for my info, is this true for all sort of aircrafts to disconnect CSD if gen fail to come on line .

Waiting for your comments. Thanx
 
avt007
Posts: 1989
Joined: Mon Jul 10, 2000 4:51 am

RE: What Goes Wrong With The Generator?

Tue May 07, 2002 2:28 am

My best guess would be that they are worried about a generator that has had bearing failure, or some other internal mechanical fault. If left turning, whether on line or not, the heat build up could cause a fire. As for other a/c, I have not heard of the requirement for disconnecting the csd, if the temperatuers are in the green.
 
FredT
Posts: 2166
Joined: Thu Feb 07, 2002 9:51 pm

RE: What Goes Wrong With The Generator?

Tue May 07, 2002 4:50 pm

Speculating here, but couldn't it be that a generator which isn't online does not generate enough resistance to keep the system happy?

Cheers,
Fred
I thought I was doing good trying to avoid those airport hotels... and look at me now.
 
popee
Topic Author
Posts: 151
Joined: Fri Feb 23, 2001 10:26 pm

RE: What Goes Wrong With The Generator?

Tue May 07, 2002 7:09 pm

Avt007, I am talking about fire incidence in which case there was nil defect with the csd/gen, but got fire only because it was not on line during hi pwr run up. Definitely mechanical errors r prone to fire.

Fred, can u please elaborate it further.

Thanx.
 
FredT
Posts: 2166
Joined: Thu Feb 07, 2002 9:51 pm

RE: What Goes Wrong With The Generator?

Tue May 07, 2002 7:45 pm

Popee,
if you're not taking out any power from a generator, the torque required to turn it will be far less than when you do.

Cheers,
Fred
I thought I was doing good trying to avoid those airport hotels... and look at me now.
 
popee
Topic Author
Posts: 151
Joined: Fri Feb 23, 2001 10:26 pm

RE: What Goes Wrong With The Generator?

Wed May 08, 2002 1:30 am

Fred, u r right. Thanx for directing me in that way.

Who is online

Users browsing this forum: greg85 and 13 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