:: Sudden Engine stop at full RPM ::

by Faisal Asif in 912 / 914 Technical Questions 11 years ago

A friend of mine owns an Experimental Aircraft with a 912 UL engine who was giving a ground run a few days back and at full RPM the engine stopped suddenly. He checked the Oil it was good and in required quantity. The coolant was also found to be in the required quantity. As per him the engine was at about 5200 rpm and everything was in green.

Any guess guys on what could have happened?

Re: :: Sudden Engine stop at full RPM ::

by Kevin Machniak » 11 years ago

Kevin Machniak

6 167 40

Hi , my first thought is fuel system problem, second I'm thinking electrical .

is this a newly built plane ? how many hrs on engine ? any recent maintenance ?

Thank you said by: Faisal Asif

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Re: :: Sudden Engine stop at full RPM ::

by Faisal Asif » 11 years ago

Faisal Asif

5 4 3

nopes its about 9 to 10 years old, there was no maintenance conducted since last annual inspection, which happened a few months ago. It was flying ok since then.

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Re: :: Sudden Engine stop at full RPM ::

by Roger Lee » 11 years ago

Roger Lee

131 5.38k 5.44k

If it slowed and or coughed and gagged to a stop then it was probably fuel related. If it stooped like you snapped your fingers or turned the key off, electrical.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

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Re: :: Sudden Engine stop at full RPM ::

by Faisal Asif » 10 years ago

Faisal Asif

5 4 3

Dear Friends,

The engine stopped suddenly, during takeoff. the Crankshaft is jam.. doesnt move a millimeter on either side.

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Re: :: Sudden Engine stop at full RPM ::

by Roger Lee » 10 years ago

Roger Lee

131 5.38k 5.44k

It looks that you will be pulling the gearbox and the engine. No way to tell without some investigation. You won't know until you start to rule some things out. I would start on the outward ends (gearbox and flywheel areas) and work my way inward. Could be a serious detonation in a cylinder? You'll need to pull heads.

If you find the cause make sure there was no collateral damage.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Thank you said by: Faisal Asif

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