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A320 Losing Fuel While Engines Start  
User currently offlineGodBless From Sweden, joined Apr 2000, 2753 posts, RR: 16
Posted (9 years 9 months 3 weeks 5 days 21 hours ago) and read 2995 times:

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

10 replies: All unread, jump to last
 
User currently offlineEMBQA From United States of America, joined exactly 11 years ago today! , 9364 posts, RR: 11
Reply 1, posted (9 years 9 months 3 weeks 5 days 20 hours ago) and read 2954 times:

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"
User currently offline320tech From Turks and Caicos Islands, joined May 2004, 491 posts, RR: 5
Reply 2, posted (9 years 9 months 3 weeks 5 days 16 hours ago) and read 2873 times:

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.
User currently offlineCYLW From Canada, joined Apr 2000, 438 posts, RR: 0
Reply 3, posted (9 years 9 months 3 weeks 5 days 12 hours ago) and read 2830 times:

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 currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 4, posted (9 years 9 months 3 weeks 4 days 23 hours ago) and read 2731 times:

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



Think of the brighter side!
User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 68
Reply 5, posted (9 years 9 months 3 weeks 4 days 23 hours ago) and read 2722 times:

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.
User currently offlineCYLW From Canada, joined Apr 2000, 438 posts, RR: 0
Reply 6, posted (9 years 9 months 3 weeks 4 days 22 hours ago) and read 2713 times:

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.


User currently offline320tech From Turks and Caicos Islands, joined May 2004, 491 posts, RR: 5
Reply 7, posted (9 years 9 months 3 weeks 4 days 19 hours ago) and read 2668 times:

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.
User currently offlineGodBless From Sweden, joined Apr 2000, 2753 posts, RR: 16
Reply 8, posted (9 years 9 months 3 weeks 4 days 18 hours ago) and read 2650 times:

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


User currently offlineAir2gxs From , joined Dec 1969, posts, RR:
Reply 9, posted (9 years 9 months 3 weeks 4 days 17 hours ago) and read 2632 times:

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 currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 10, posted (9 years 9 months 3 weeks 4 days 13 hours ago) and read 2597 times:

Fuel dripping on Shutdown can occur.Unburned fuel.
But not with a running Engine.NOGO.
regds
MEL



Think of the brighter side!
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