First Tail Rotor Failure
Posted 06 January 2003 - 12:32
Some things to note, both of us (A&P) preflighted the main rotor and tail rotor, and noted no problems. Before I ever let a student pick it up we always clear the area and I look back at the tail rotor to see if it is clear, spinning, and to check for any oscilations in the tailboom. The little prop was spinning just fine.....then!! Anyway, I'm kicking myself for not trusting my instincts on that tiny, intermitent vibration, but was happy with my instinctive corrective action. Also, this emphasized the importance of picking the aircraft up smoothly. I'd much rather find out about a control problem while I'm on the ground not to meniton dynamic rollover. Last note, the reason I say timing is important....that aircraft had flown 3 times that day, and the previous flight had just got back 20 minutes before. I can't think of a better time for a tail rotor to fail, than on the ground during pick-up. For those wondering, one of the end caps on the T/R driveshaft had a hole about 1/2" in diameter drilled into it by the T/R gearbox spline retaining nut. This allowed the driveshaft splines to disengage from the gearbox. We are not sure why yet, but it looks like improper installation.
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Posted 12 February 2013 - 17:54
Posted 12 February 2013 - 18:52
We had some slight high freq vibes on the OH-58 not too long ago. Found some spread disc packs but that was it.
Great writeup thanks for sharing.
Posted 13 February 2013 - 10:20
Just a pilot (retired, so I have a LOT of time)...
Posted 14 February 2013 - 12:38
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