# NTSB DEN87LA019: Bell 47G-3B-1, N47042, Goshen, UT, November 10, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 10, 1986, 13:10 local (20:10 UTC)
- Place: Goshen, UT
- Coordinates: 39.92979, -111.880302 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.9298&lon=-111.8803&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 17149
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN87LA019
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17149/pdf
- Page: https://openairdocs.org/ntsb/DEN87LA019

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - autorotation - intentional, pilot in command (contributing factor)
  - lack of total experience in type operation, pilot in command (cause)
  - collective - improper use of, pilot in command (contributing factor)
  - flare - improper, pilot in command (contributing factor)
  - rotor rpm - not maintained, pilot in command (cause)
- Roll over, landing - roll

## Analysis

THE PLT WAS PRACTICING POWER RECOVERY AUTOROTATIONS THEN ATTEMPTED ONE POWER OFF, FULL STOP. THE PLT ALLOWED THE MAIN ROTOR RPM TO DECAY DURING APPROACH AND TOOK NO CORRECTIVE ACTION. THE ACFT LANDED HARD WITH SLIGHT FORWARD MOTION AND THE PLT APPLIED AFT CYCLIC. THE MAIN ROTOR STRUCK THE TAIL BOOM AND THE ACFT ROLLED OVER ON ITS RIGHT SIDE.

## Aircraft

- Registration: [N47042](https://openairdocs.org/deregistered/N47042-2013-03-25), registration cancelled 2013-03-25, S/N 6608 (OpenAirDocs)
- Reported make and model: BELL 47G-3B-1
- Registry model: [Bell 47G-3B-1](https://openairdocs.org/model/bell-47g-3b-1) (registry code 1181028) (OpenAirDocs)
- Registry engine: [Lycoming TVO-435-GIA](https://openairdocs.org/engine/lycoming-tvo-435-gia) (registry code 41526, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Serial number: 6608
- Airframe hours: 400
- Engines: LYCOMING TV0-435 BI 280 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Ray Okelberry
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 5, 1986
- Departed: GOSHEN, UT

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 27; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 854 total, 530 in this make and model, 713 as pilot in command, 24 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 32 °F
- Altimeter: 30.00 inHg

## Other investigations on N47042 (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 SEA76FYA24](https://openairdocs.org/ntsb/SEA76FYA24), May 17, 1976: Bell 47G3B1 (N47042), Burley, ID, 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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