# NTSB CHI90LA198: Fairchild Hiller FH-1100, N442FH, Ozark, MO, July 26, 1990

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 26, 1990, 14:15 local (19:15 UTC)
- Place: Ozark, MO
- Coordinates: 37.009597, -93.199295 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.0096&lon=-93.1993&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report March 12, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 14722
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90LA198
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14722/pdf
- Page: https://openairdocs.org/ntsb/CHI90LA198

## Probable cause

TOTAL LOSS OF ENGINE POWER DUE TO #2 TURBINE SHAFT BEARING FAILURE. A FACTOR RELATED TO THE ACCIDENT WAS: NONE SUITABLE TERRAIN.

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise
  - turbine assembly,shaft bearing - failure,total (cause)
- Forced landing, descent - emergency
- Roll over, landing
  - terrain condition - none suitable (contributing factor)

## Analysis

THE PLT SAID THAT WHILE IN CRUISE, HE HEARD A LOUD POP FROM THE REAR OF THE HELICOPTER, THEN THE TURBINE BEGAN TO SPOOL DOWN. AN EMERENCY AUTOROTATION, RUN-ON LDG WAS ATTEMPTED WHICH RESULTED IN A TAIL ROTOR STRIKE, THEN A ROLL-OVER. POST ACCIDENT INVESTIGATION REVEALED A FAILED #2 TURBINE SHAFT BEARING.

## Aircraft

- Registration: [N442FH](https://openairdocs.org/deregistered/N442FH-1992-08-20), registration cancelled 1992-08-20, S/N 165 (OpenAirDocs)
- Reported make and model: FAIRCHILD HILLER FH-1100
- Registry model: [Fairchild Hiller FH-1100](https://openairdocs.org/model/fairchild-hiller-fh-1100) (registry code 3376502) (OpenAirDocs)
- Category: Helicopter
- Serial number: 165
- Engines: ALLISON 250-C18 317 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Modern Transportation Mode
- Departed: NIXA, MO
- Destination: MU70, OZARK, MO

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 34; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 312 total, 28 in this make and model, 193 as pilot in command, 34 in the last 90 days, 2 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 7 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °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 19900726028779A](https://openairdocs.org/incident/19900726028779A), Jul 26, 1990: Hiller FH1100, Ozark, MO, Substantial damage. Engine lost power en route. Made power off run landing. Tailboom hit first causing rollover. Turbine shaft failure

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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