# NTSB SEA83LA011: Brantly 305, N16616, Hillsboro, OR, October 23, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 23, 1982, 14:00 local (21:00 UTC)
- Place: Hillsboro, OR
- Coordinates: 45.440898, -122.960472 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.4409&lon=-122.9605&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 23, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 71030
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA83LA011
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/71030/pdf
- Page: https://openairdocs.org/ntsb/SEA83LA011

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - flare - improper, pilot in command (cause)
- Roll over, landing - flare/touchdown

## Analysis

THE TAIL SKID HIT THE GROUND HARD DURING LANDING. THIS CAUSED THE HELICOPTER TO BOUNCE, AND THE LEFT WHEEL CONTACTED THE GROUND CAUSING THE HELICOPTER TO TURN SIDEWAYS. THE MAIN ROTOR CONTACTED THE TAIL ROTOR, DESTROYING BOTH TAIL AND MAIN ROTOR BLADES.

## Aircraft

- Registration: [N16616](https://openairdocs.org/deregistered/N16616-2013-03-11), registration cancelled 2013-03-11, S/N 1005, built 1967 (OpenAirDocs)
- Reported make and model: BRANTLY 305
- Registry model: [Brantly 305](https://openairdocs.org/model/brantly-305) (registry code 1440602) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1005
- Airframe hours: 686
- Engines: LYCOMING IVO-540-A1A 305 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Tracy A. Goff
- Registered owner: Lowell H. Holtrop
- Departed: HILLSBORO, OR
- Destination: HILLSBORO, OR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; private; medical: class 2, valid medical--no waivers/lim.; flight hours: 137 total, 30 in this make and model, 84 as pilot in command, 8 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 25 statute miles
- Temperature: 122 °F

## 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 19821023055029A](https://openairdocs.org/incident/19821023055029A), Oct 23, 1982: Cessna 305, Hillsboro, OR, Substantial damage. Bounced on landing. Main rotors struck tail rotor. Helicopter turned sideways and rolled on its side.

## Other investigations on N16616 (2)

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 CHI77DEE55](https://openairdocs.org/ntsb/CHI77DEE55), Aug 17, 1977: Brantly 305 (N16616), Wheeling, IL, substantial damage
- [NTSB MKC75FCD37](https://openairdocs.org/ntsb/MKC75FCD37), Mar 2, 1975: Brantly 305 (N16616), Swisher, IA, 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.