godbless
Posts: 2680
Joined: Tue Apr 04, 2000 5:26 am

A320 Losing Fuel While Engines Start

Mon Jan 03, 2005 5:42 am

I have seen it various times already that whenever an A320 with Cfm's starts the engines that fuel runs out at the bottom of the engine until it runs at normal speed.
Is this normal? Why isn't anything done to prevent this "leaky problem"?

Max
 
EMBQA
Posts: 7798
Joined: Sat Oct 25, 2003 3:52 am

RE: A320 Losing Fuel While Engines Start

Mon Jan 03, 2005 6:21 am

Can you see if there is a picture in the data base...? I have seen in the past of the case drain vent line giving off a 'vapor like' discharge. This is pretty normal.
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
320tech
Posts: 489
Joined: Mon May 17, 2004 11:38 am

RE: A320 Losing Fuel While Engines Start

Mon Jan 03, 2005 10:34 am

A320's aren't supposed to be losing fuel while the engines are starting. If there is fuel coming from the drains during start, it's possibly from the VBV's or VSV's, both of which are fuel driven. This is a problem that should get fixed quickly.

On the other hand, if you're seeing a mist rather than liquid, maybe you're seeing the starter air exhaust.
The primary function of the design engineer is to make things difficult for the manufacturer and impossible for the AME.
 
cylw
Posts: 408
Joined: Sun Apr 09, 2000 2:34 pm

RE: A320 Losing Fuel While Engines Start

Mon Jan 03, 2005 2:24 pm

When I worked on the ramp, we had an A320 that was dripping fuel from one engine. The captain said that unless it was dripping more than every couple of seconds or so it was normal. Unfortunately, this engine was dripping about 2-3 drops per second and the flight ended up being cancelled.
 
User avatar
HAWK21M
Posts: 29867
Joined: Fri Jan 05, 2001 10:05 pm

RE: A320 Losing Fuel While Engines Start

Tue Jan 04, 2005 3:19 am

When I worked on the ramp, we had an A320 that was dripping fuel from one engine. The captain said that unless it was dripping more than every couple of seconds or so it was normal.

Thats not normal.Was it a drip or fumes.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
SlamClick
Posts: 9576
Joined: Sun Nov 23, 2003 7:09 am

RE: A320 Losing Fuel While Engines Start

Tue Jan 04, 2005 3:47 am

We had a steady drip from a BAe-146 once and while the captain and the mechanic were debating whether or not it was an acceptable rate, suddenly gallons of fuel and oil poured out on the ramp.

It was not acceptable.
Happiness is not seeing another trite Ste. Maarten photo all week long.
 
cylw
Posts: 408
Joined: Sun Apr 09, 2000 2:34 pm

RE: A320 Losing Fuel While Engines Start

Tue Jan 04, 2005 4:24 am

Thats not normal.Was it a drip or fumes.
regds
MEL


Dripping fuel for sure. It left a nice 12 x 6 inch puddle near the #1 engine. Usually when the 319/320 left, there was a very small fuel puddle right below where the engines were. This time there was much more than usual though.
 
320tech
Posts: 489
Joined: Mon May 17, 2004 11:38 am

RE: A320 Losing Fuel While Engines Start

Tue Jan 04, 2005 7:26 am

The standard for A320's, with CFM's at least, is that no fuel should drip while the engine is running. It is acceptable for fuel to leak while the engine is shut down, although it should be investigated and stopped - not a reason to cancel the flight, as long as the leak stops when the engine is running.
The primary function of the design engineer is to make things difficult for the manufacturer and impossible for the AME.
 
godbless
Posts: 2680
Joined: Tue Apr 04, 2000 5:26 am

RE: A320 Losing Fuel While Engines Start

Tue Jan 04, 2005 9:00 am

It is acceptable for fuel to leak while the engine is shut down
My question would be if it is also acceptable for the engine to leak while it is started.
All I was told is that that is normal, but not by people who really have a clue... But good to know that that is something which is not normal.

Max
 
air2gxs
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: A320 Losing Fuel While Engines Start

Tue Jan 04, 2005 9:44 am

We don't operate the A320, but the CFM56's we do operate tend to leak while shutdown in the cold weather. The leak will continue during the start, but will usually stop by starter cut-out.

But, a 12 X 16 puddle during the start sequence alone? I think there is a problem that must be investigated. If these engine are anything like ours, I would expect a leak in the VBV or VSV actuation system, since these 2 units are in motion during the start and don't move again until the engine is accelerated.
 
User avatar
HAWK21M
Posts: 29867
Joined: Fri Jan 05, 2001 10:05 pm

RE: A320 Losing Fuel While Engines Start

Tue Jan 04, 2005 1:26 pm

Fuel dripping on Shutdown can occur.Unburned fuel.
But not with a running Engine.NOGO.
regds
MEL
I may not win often, but I damn well never lose!!! ;)

Who is online

Users browsing this forum: No registered users and 13 guests