# NTSB UNK65X0217: Helio 391B, N173K, Perry, FL, October 10, 1964

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: October 10, 1964
- Place: Perry, FL · PERRY, FL
- Location: 30.1091° N, 83.5823° W: Placed by OpenAirDocs: center of Perry, FL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=30.1091&lon=-83.5823&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 29, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 181168
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK65X0217
- Page: https://openairdocs.org/ntsb/UNK65X0217

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3838  64/10/10   PERRY FLA           HELIO 391B          CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 24,
        TIME - 1115                    N173K               PX-  0  0  1  PLEASURE/PERSONAL TRANSP  UNK/NR TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            UNK/NR IN TYPE,
                                                                                                   INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
```

## Aircraft

- Registration: [N173K](https://openairdocs.org/aircraft/N173K), registered now, S/N 074 (OpenAirDocs)
- Reported make and model: HELIO 391B
- Registry model: [Helio H-391B](https://openairdocs.org/model/helio-h-391b) (registry code 4300106) (OpenAirDocs)
- Registry engine: [Lycoming GO-435](https://openairdocs.org/engine/lycoming-go-435) (registry code 41520, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N173K (3)

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 ANC94LA007](https://openairdocs.org/ntsb/ANC94LA007), Oct 8, 1993: Helio H-391-B (N173K), Beaver Creek, AK, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN THE REQUIRED AIRSPEED DURING THE EMERGENCY DESCENT AS PUBLISHED IN THE PILOT'S MANUAL. A FACTOR IS THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS.
- [NTSB ANC80FAA15](https://openairdocs.org/ntsb/ANC80FAA15), Jun 28, 1980: Helio Acft H-250 (N173K), Northway, AK, substantial damage
- [NTSB LAX67F0059](https://openairdocs.org/ntsb/LAX67F0059), Aug 2, 1966: Helio H-391B (N173K), Van Nuys, CA, 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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