# NTSB DEN79FTE01: Piper PA-22, N3921P, Olney Springs, CO, October 16, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 16, 1978
- Place: Olney Springs, CO · OLNEY SPRINGS, CO
- Location: 38.1663° N, 103.9445° W: Placed by OpenAirDocs: center of Olney Springs, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.1663&lon=-103.9445&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 20, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 139005
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN79FTE01
- Page: https://openairdocs.org/ntsb/DEN79FTE01

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2678  78/10/16   OLNEY SPRINGS,CO    PIPER PA-22         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 38, 250
        TIME - 1445                    N3921P              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 140 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          HUGO,CO                     TRINIDAD,CO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- EXHAUST VALVE NO.4 CYLINDER FAILED.
```

## Aircraft

- Registration: [N3921P](https://openairdocs.org/aircraft/N3921P), registered now, S/N 22-3591, built 1957 (OpenAirDocs)
- Reported make and model: PIPER PA-22
- Registry model: [Piper PA-22-150](https://openairdocs.org/model/piper-pa-22-150) (registry code 7102210) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## 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 19781016028769A](https://openairdocs.org/incident/19781016028769A), Oct 16, 1978: Piper PA22150, Olney Springs,C, CO, Substantial damage. Exhaust valve no.4 cylinder failed.

## Other investigations on N3921P (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 DEN82DA027](https://openairdocs.org/ntsb/DEN82DA027), Jan 31, 1982: Piper PA-22 (N3921P), Trinidad, CO, substantial damage
- [NTSB DEN69D0078](https://openairdocs.org/ntsb/DEN69D0078), Jun 24, 1968: Piper PA-22 (N3921P), Greeley, CO, 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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