Helicopter down in AZ

Discussion in 'Hangar Talk' started by pmanton, Apr 16, 2019.

  1. pmanton

    pmanton Cleared for Takeoff PoA Supporter

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    News showed the remains of a helicopter down. Very compact wreckage with no signs of any rotor blades that I could see.

    So very sad.
    RIP
     
  2. Zeldman

    Zeldman Touchdown! Greaser!

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  3. Scrabo

    Scrabo Pattern Altitude

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  4. Velocity173

    Velocity173 Touchdown! Greaser! PoA Supporter

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    Wow, he was pretty big in the helicopter community. Worked at XP Services out in KTHA. Appears he was in charge of developing / testing new composite blades for the B206.

    Lost a good one. Sad.
     
  5. Gerhardt

    Gerhardt En-Route

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    Sorry to read this.
     
  6. Bell206

    Bell206 Cleared for Takeoff

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    Whatever happened he lost the entire M/R drivetrain at altitude to get that type of debris spread and the fuselage intact in one place. XP performs flight testing for 3rd parties and hopefully the onboard sensors survived the fire or the data was live streamed somewhere. RIP.
     
  7. Velocity173

    Velocity173 Touchdown! Greaser! PoA Supporter

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  8. weilke

    weilke Touchdown! Greaser! PoA Supporter

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    'The accident flight was the last test flight of the main rotor blades before the certification process.'
     
  9. PeterNSteinmetz

    PeterNSteinmetz Line Up and Wait

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    So - testing new rotor blades. There is some video of the crash after the initial “bang” was heard.
     
  10. Unit74

    Unit74 Final Approach

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    Sounds like the dog house blew apart..... I’m wondering if the main rotor departed first just like that Apache did a few years ago.
     
  11. Bell206

    Bell206 Cleared for Takeoff

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    The only "doghouse" on a 206 is the oil cooler cowling. With a mile long debris field and the intake cowl and vert fin/TR GB assy sitting next to each other, 300 yards from the fuselage, either one MR blade came off or the entire MR/xsmn assy came out rather quickly. Either way the failed part(s) should be attached to the MR/xsmn assy as they apparently didn't follow the fuselage to its final resting place. Maybe some of the test data was live streamed.
     
  12. Unit74

    Unit74 Final Approach

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    In the full auto, is there any issues with mast bumping or over speed on the main?
     
  13. Bell206

    Bell206 Cleared for Takeoff

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    While possible, mast bumping in a 206, 205 (Huey), 212 is usually a non-issue as they are considered a "heavy inertia" blade system vs a "light inertia" system like a R22. Same with overspeed. But it's all dependent on pilot technique which I don't think was at issue here.

    Heavy systems are slow to respond whereas light systems are fast to respond to load vs unload conditions on the MR. In my experience, most mast bump incidents would leave the aft portion of the tailboom in one location and the rest of the aircraft in another location.
     
  14. Velocity173

    Velocity173 Touchdown! Greaser! PoA Supporter

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    You’re still under load during an auto so mast bumping is out. You might get about .5 G in an aggressive entry but nothing to cause things floating in the cockpit.

    Over speed can occur in any helo in auto for several reasons (turns, weight, DA, poor track and balance) but unless the pilot is completely inattentive to Nr, there shouldn’t be an overspeed. Definitely shouldn’t get to the point of throwing a blade.