# NTSB ANC74AA006: Hiller Acft UH-12E, N9743C, Bettles, AK, July 11, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 11, 1973
- Place: Bettles, AK · BETTLES, AK
- Location: 66.9073° N, 151.5381° W: Placed by OpenAirDocs: center of Bettles, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=66.9073&lon=-151.5381&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 11, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 189667
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC74AA006
- Page: https://openairdocs.org/ntsb/ANC74AA006

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1854  73/7/11  NR.BETTLES,ALAS       HILLER ACFT UH-12E  CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1400                    N9743C              PX-  0  0  1  AIR TAXI-PASSG            AGE 26, 3070 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1350 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         BETTLES,ALAS                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-ON LANDING
           ROLL OVER                                                LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           WEATHER - UNFAVORABLE WIND CONDITIONS
        FACTOR(S)
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
        WEATHER BRIEFING - UNKNOWN/NOT REPORTED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                      6000
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      40
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          180                                                       20
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- ATTEMPTED LDG ON MTN RIDGE,WIND GUSTING TO 30K. GEOLOGICAL STUDIES.
```

## 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 ACFT 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

## 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 19730711023729A](https://openairdocs.org/incident/19730711023729A), Jul 11, 1973: Hiller UH12E, Bettles, AK, Substantial damage. Attempted ldg on mtn ridge,wind gusting to 30K. Geological studies.

## 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 ANC72DAA36](https://openairdocs.org/ntsb/ANC72DAA36-201689), Dec 7, 1968: Hiller UH-12E (N9743C), Stevens Vill, 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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