# NTSB DEN84LA221: Piper 28RT-201T, N8168Q, Glendo, WY, July 20, 1984

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 20, 1984, 11:00 local (17:00 UTC)
- Place: Glendo, WY
- Coordinates: 42.499214, -105.020545 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.4992&lon=-105.0205&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16432
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN84LA221
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16432/pdf
- Page: https://openairdocs.org/ntsb/DEN84LA221

## 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 - normal
  - engine assembly,crankshaft - failure,total (cause)
  - inadequate quality control, manufacturer (cause)
  - engine assembly,crankshaft - fatigue (cause)
- Forced landing, descent - emergency
- In flight collision with object, landing
  - terrain condition - none suitable (contributing factor)
  - object - tree(s) (contributing factor)

## Analysis

THE ACFT WAS DAMAGED IN A FORCED LANDING IN A WOODED AREA AFTER THE ENGINE FAILED. THE PLT SAID THAT HE WAS CRUISING AT 7500 FT MSL WHEN WITHOUT WARNING THE ENGINE BEGAN MAKING NOISES AND THEN LOST OIL PRESSURE. AFTER THE LANDING THE ENGINEWAS EXAMINED AT THE DUFF ACFT CO. IN DENVER, CO. IT WAS FOUND THAT THE CRANKSHAFT HAD FAILED. DURING LABORATORY FAILURE ANAYSIS THESE CONCLUSIONS WERE DRAWN: FAILURE FROM FATIGUE AT LOW STRESS LEVELS & FATIGUE ORIGINATED ON THE WALLS OF THELURICATION HOLE WHERE COARSE MACHINE MARKS WERE PRESENT.

## Aircraft

- Registration: [N8168Q](https://openairdocs.org/deregistered/N8168Q-1984-12-11), registration cancelled 1984-12-11, S/N 28R-8031072 (OpenAirDocs)
- Reported make and model: PIPER 28RT-201T
- Registry model: [Piper PA-28RT-201T](https://openairdocs.org/model/piper-pa-28rt-201t) (registry code 7102817) (OpenAirDocs)
- Category: Airplane
- Serial number: 28R-80 31072
- Airframe hours: 823
- Engines: CONTINENTAL TSIO-360-FB1 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Jeffrey Fisher
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 18, 1983, 62 hours before
- Departed: JAC, JACKSON, WY
- Destination: FSD, SIOUX FALLS, SD

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 338 total, 260 in this make and model, 250 as pilot in command, 25 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 75 °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 19840720034039A](https://openairdocs.org/incident/19840720034039A), Jul 20, 1984: Piper PA28RT201T, Glendo, WY, Substantial damage. Crash occurred during emergency landing after engine failure caused by crankshaft 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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