914 Turbo Partial Failure
in General Tech Discussion
6 years ago
Tecnam Astore 2015 with Rotax 914 Turbo. ~150 hours since new. Annual in March with no major problems.
Flying July 16, 2018, OAT 88F, Run up, take off normal. About three miles from runway, I switched off fuel boost pump. Engine died for a second. Recovered with partial power. A low "Hum" could be heard, varying in pitch and intensity. Gauges in green when I checked: CHT (One cylinder only), Fuel pressure, oil pressure and temp. Fuel tanks full of 91 octane, ethanol free auto gas (Shell).
Switching boost pump back on improved but did not eliminate the problem. Made it back to the airport.
Ran it up on the ground yesterday, July 17. Temp 77F. Started and ran mostly full throttle for 10 minutes. Experienced one slight hesitation but nothing like day before.
Inspection of engine after each of these episodes revealed no leaks, odors, stains, nothing loose. Always drain sumps (3). Never seen water.
Dx? Advice?
Inspection check list?
Flying July 16, 2018, OAT 88F, Run up, take off normal. About three miles from runway, I switched off fuel boost pump. Engine died for a second. Recovered with partial power. A low "Hum" could be heard, varying in pitch and intensity. Gauges in green when I checked: CHT (One cylinder only), Fuel pressure, oil pressure and temp. Fuel tanks full of 91 octane, ethanol free auto gas (Shell).
Switching boost pump back on improved but did not eliminate the problem. Made it back to the airport.
Ran it up on the ground yesterday, July 17. Temp 77F. Started and ran mostly full throttle for 10 minutes. Experienced one slight hesitation but nothing like day before.
Inspection of engine after each of these episodes revealed no leaks, odors, stains, nothing loose. Always drain sumps (3). Never seen water.
Dx? Advice?
Inspection check list?
