Mike Buettgenbach
Active Member
~ 350 Hrs on engine
Carbs are well sync'd
No apparent noise on shutdown
I have to "soft start" kit on the engine
Over the last 40-50 hrs of flying, there has been a squeak/squeal/screech during taxi. It happens a bit above idle and stops about 3500 RPM. Nothing noteworthy on t/o roll or climb-out. Upon landing, no noise at any rpm.
Today-- On climbout, a similar noise happened, I turned back to the airport...then it stopped. Continued to the destination. Enroute (about 30 min at this point), a similar noise started at a similar tone frequency and ramp'd up in frequency over about a 20 sec period, stayed for 10-15 sec and stopped. [4500 ft, 5360 RPM, no indication of change in instr]
I won't go thru all the details, but it happened 2 more times in a similar fashion before I got back to home base.
No gear box problems (that I know of). Just finished annual condition insp, all is good.
I don't want to lead the witness, but it "feels" like a gear box problem...
Suggestions welcome!
Thx
Carbs are well sync'd
No apparent noise on shutdown
I have to "soft start" kit on the engine
Over the last 40-50 hrs of flying, there has been a squeak/squeal/screech during taxi. It happens a bit above idle and stops about 3500 RPM. Nothing noteworthy on t/o roll or climb-out. Upon landing, no noise at any rpm.
Today-- On climbout, a similar noise happened, I turned back to the airport...then it stopped. Continued to the destination. Enroute (about 30 min at this point), a similar noise started at a similar tone frequency and ramp'd up in frequency over about a 20 sec period, stayed for 10-15 sec and stopped. [4500 ft, 5360 RPM, no indication of change in instr]
I won't go thru all the details, but it happened 2 more times in a similar fashion before I got back to home base.
No gear box problems (that I know of). Just finished annual condition insp, all is good.
I don't want to lead the witness, but it "feels" like a gear box problem...
Suggestions welcome!
Thx