# NTSB ANC72DAA36: Hiller UH-12E, N9743C, Stevens Vill, AK, December 7, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 7, 1968
- Place: Stevens Vill, AK · STEVENS VILL, AK
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report August 30, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 201689
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC72DAA36
- Page: https://openairdocs.org/ntsb/ANC72DAA36-201689

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4960   68/12/7   STEVENS VILL,ALAS   HILLER UH-12E       CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1430                    N9743C              PX-  0  0  1  AIR TAXI-PASSG            AGE 32, 2999 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            182 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BETTLES,ALAS                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: TREES                                     LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR GEAR BOX
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - LACK OF LUBRICATION-SPECIFIC PART,NOT SYSTEM
           TERRAIN - HIGH OBSTRUCTIONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- OIL CONGEALED IN M/R TRANS,1ST STAGE PLANETARY GRS FAILED,M/R BLDS HIT TREES IN LDG AREA.
```

## Aircraft

- Registration: [N9743C](https://openairdocs.org/deregistered/N9743C-2013-07-29), registration cancelled 2013-07-29, S/N 2141, built 1961 (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

## Other investigations on N9743C (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 FTW96LA315](https://openairdocs.org/ntsb/FTW96LA315), Jul 24, 1996: Hiller UH-12E (N9743C), Mount Holly, AR, substantial damage. Probable cause: Fuel exhaustion due to the pilot's failure to refuel the helicopter. A factor was the lack of suitable terrain for the forced landing.
- [NTSB ANC74AA006](https://openairdocs.org/ntsb/ANC74AA006), Jul 11, 1973: Hiller Acft UH-12E (N9743C), Bettles, AK, 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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