# NTSB SEA83FYM05: Brantly Helicopter B-2, N5912X, Milton Freewtr., OR, May 4, 1983

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Final report
- Date: May 4, 1983, 08:00 local (15:00 UTC)
- Place: Milton Freewtr., OR
- Coordinates: 45.900527, -118.340156 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.9005&lon=-118.3402&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39648
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA83FYM05
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39648/pdf
- Page: https://openairdocs.org/ntsb/SEA83FYM05

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - rotor system,main rotor blade spar - overload (cause)
  - rotor system,main rotor blade - failure,total (cause)
  - rotor system,main rotor blade - separation (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE HELICOPTER WAS OBSERVED TO CLIMB TO ABOUT 50-75 FT AGL & THEN SOMETHING FLEW OFF THE ACFT. ONE M/R BLADE WAS FOUND INTACT 240 FT FROM THE WRECKAGE. THE OUTER BLADE WAS HEAVILY DAMAGED AT THE TIP AREA. THE INBOARD BLADE SECTION HAD THE PYLON TUBE ATTACHED TO IT. THE FLANGE END OF THE PYLON TUBE WAS BENT, & ABOUT 50% OF THE FLANGE ITSELF WAS MISSING. METALLURGICAL EXAM REVEALED AN OVERSTRESS TENSILE SEPARATION. THE PLT DID NOT HOLD ANY PLT CERTIFICATE. HE PURCHASED THEHELICOPTER FEBRUARY TO HOVER OVER HIS CHERRY ORCHARDS UTILIZING THE ROTOR DOWN WASH TO KNOCK WATER OFF THE FRUIT. THE PLT HAD RECEIVED ABOUT 15 HRS OF TRAINING SINCE HE PURCHASED THE HELICOPTER.

## Aircraft

- Registration: [N5912X](https://openairdocs.org/aircraft/N5912X), registered now, S/N 48 (OpenAirDocs)
- Reported make and model: Brantly Helicopter B-2
- Registry model: [Brantly B-2](https://openairdocs.org/model/brantly-b-2) (registry code 1440502) (OpenAirDocs)
- Category: Helicopter
- Serial number: 48
- Airframe hours: 971
- Engines: LYCOMING VO-360-A1A 180 horsepower reciprocating
- Damage: Substantial damage
- Fire: On-Ground
- Flight: Personal, Part 91
- Registered owner: Christ & Greg Feigner
- Last inspection: Annual, February 24, 1983, 37 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; airplane ratings: single-engine land; medical: unknown; seat: left; toxicology performed

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 61 °F
- Altimeter: 29.00 inHg

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19830504019939A](https://openairdocs.org/incident/19830504019939A), May 4, 1983: Hynes B2, Milton Freewate, OR, Substantial damage. Unlicensed pilot overstressed the main rotor blades by violent manuevering. After takeoff. Blade separated at hub.

## Other investigations on N5912X (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CHI74FEV55](https://openairdocs.org/ntsb/CHI74FEV55), May 29, 1974: Brantly B-2 (N5912X), Atterbury, IL, substantial damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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