# NTSB FTW79FQG05: Hiller UH-12E, N4026S, Stratford, TX, October 19, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 19, 1978
- Place: Stratford, TX · STRATFORD, TX
- Location: 36.3376° N, 102.0760° W: Placed by OpenAirDocs: center of Stratford, TX, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.3376&lon=-102.0760&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report February 8, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 138468
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW79FQG05
- Page: https://openairdocs.org/ntsb/FTW79FQG05

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3855  78/10/19   STRATFORD,TX        HILLER UH-12E       CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 48, 7100
        TIME - 1730                    N4026S              PX-  0  0  1  DEMONSTRATION             TOTAL HOURS, 129 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - STRATFORD FIELD
        DEPARTURE POINT             INTENDED DESTINATION
          STRATFORD,TX                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE INSPECTION OF AIRCRAFT (MAINTENANCE PERSONNEL)
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
           MISCELLANEOUS - FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        REMARKS- DEBRIS FROM PREVIOUS REPAIR JOB LEFT IN INDUCTION SYSTEM,ENTERED CYLINDERS AND DAMAGED SPARK PLUGS
```

## Aircraft

- Registration: [N4026S](https://openairdocs.org/deregistered/N4026S-2002-11-04), registration cancelled 2002-11-04, S/N 5055, built 1978 (OpenAirDocs)
- Reported make and model: HILLER UH-12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122) (OpenAirDocs)
- Registry engine: [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series) (registry code 41534, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Stratford Field

## 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 19781019040149A](https://openairdocs.org/incident/19781019040149A), Oct 19, 1978: Hiller UH12C, Stratford, TX, Substantial damage. Debris from previous repair job left in induction system,entered nders and damaged spark plugs

## Other investigations on N4026S (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 CHI94LA022](https://openairdocs.org/ntsb/CHI94LA022), Oct 22, 1993: Hiller UH12E (N4026S), Sioux Rapids, IA, destroyed. Probable cause: the Pilot in Command failed to maintain clearance with the terrain while proceeding up an upslope.
- [NTSB LAX82DA306](https://openairdocs.org/ntsb/LAX82DA306), Aug 20, 1982: Hiller UH-12E (N4026S), Chandler, AZ, 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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