Barking aircraft
Thread Starter
Joined: Nov 2005
Posts: 30
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From: Wherever the wind takes me
Barking aircraft
Hey all you clever engineers out there...
Maybe one of you can help - what will cause a Cessna Caravan's engine (PT6-114A) to "bark" during taxy? Sounds like a compressor stall or something. Popping noises, only during taxy. Any help would be appreciated
Maybe one of you can help - what will cause a Cessna Caravan's engine (PT6-114A) to "bark" during taxy? Sounds like a compressor stall or something. Popping noises, only during taxy. Any help would be appreciated
Joined: Jan 2003
Posts: 164
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From: Alloway
perrin
Had this a few times while looking after SFPA A/c at Pik, try a really good compressor and even more important a turbine wash, if your A/C flies low
over sea water it will take a couple of good washes to cure. Good tip to aircrew when you see rain fly into it best wash going.
Keep they flying Peter
over sea water it will take a couple of good washes to cure. Good tip to aircrew when you see rain fly into it best wash going.Keep they flying Peter
Thread Starter
Joined: Nov 2005
Posts: 30
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From: Wherever the wind takes me
Thanks for the replies everyone
We fly through plenty of rain up here in West Africa... Thanks Peter, didn't realise it was good for the engine!
It only barks in low idle and not the first flight of the day for some reason. We've been taxying in high idle in the meantime until someone can look at it. No strange instrument indications shown.
Will post again when they've found the problem... going for maintenance this weekend
Take care
We fly through plenty of rain up here in West Africa... Thanks Peter, didn't realise it was good for the engine!
It only barks in low idle and not the first flight of the day for some reason. We've been taxying in high idle in the meantime until someone can look at it. No strange instrument indications shown.
Will post again when they've found the problem... going for maintenance this weekend
Take care
Thread Starter
Joined: Nov 2005
Posts: 30
Likes: 0
From: Wherever the wind takes me
Bleed valve was replaced a few weeks ago - didn't solve it. 
Compressor wash done during service and no problem found with the compressor blades... Suspect problem to be FCU - taxying in high idle until the part arrives.
Will see if that changes anything
Compressor wash done during service and no problem found with the compressor blades... Suspect problem to be FCU - taxying in high idle until the part arrives.Will see if that changes anything
