# NTSB SEA79AA029: Hiller UH12D, N64867, Chehalis, WA, April 3, 1979

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: April 3, 1979
- Place: Chehalis, WA · CHEHALIS, WA
- Location: 46.6642° N, 122.9654° W: Placed by OpenAirDocs: center of Chehalis, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.6642&lon=-122.9654&mi=10
- Phase of flight: [Emergency descent](https://openairdocs.org/ntsb-phases/600) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 uninjured
- Status: Completed, report May 3, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 137408
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA79AA029
- Page: https://openairdocs.org/ntsb/SEA79AA029

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0468   79/4/3    CHEHALIS,WA         HILLER UH12D        CR-  0  0  1  MISCELLANEOUS             AIRLINE TRANSPORT, AGE
        TIME - 0915                    N64867              PX-  1  0  0  TEST                      49, 11500 TOTAL HOURS,
                                       DAMAGE-MINOR        OT-  0  0  0                            500 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - SOLOY HELIPAD
        DEPARTURE POINT             INTENDED DESTINATION
          CHEHALIS,WA                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: AUTOROTATIVE DESCENT
        PROBABLE CAUSE(S)
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: COLLECTIVE PITCH CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
        FACTOR(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE INSPECTION OF AIRCRAFT (MAINTENANCE PERSONNEL)
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  LATERAL CONTROL PROBLEM
                                  PITCH CONTROL PROBLEM
        REMARKS- MALF OF COLLECTIVE CONTROL,LINKAGE SEPARATED.PAX FELL FROM HELICOPTER.
```

## Aircraft

- Registration: [N64867](https://openairdocs.org/deregistered/N64867-2013-07-23), registration cancelled 2013-07-23, S/N 1114, built 1959 (OpenAirDocs)
- Reported make and model: HILLER UH12D
- Registry model: [Hiller UH-12D](https://openairdocs.org/model/hiller-uh-12d) (registry code 4360118) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Minor damage
- Airport: Soloy Helipad

## 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 19790403006379A](https://openairdocs.org/incident/19790403006379A), Apr 3, 1979: Hiller UH12D, Chehalia, WA, Minor damage, 1 fatal. Bolt missing in collective control. Mechanic passenger reached out the door to try to fix the problem, fell out.

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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