# NTSB CHI77FEM43: Hiller UH-12B, N94735, Carrollton, MI, September 26, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 26, 1977
- Place: Carrollton, MI · CARROLLTON, MI
- Location: 43.4586° N, 83.9303° W: Placed by OpenAirDocs: center of Carrollton, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.4586&lon=-83.9303&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report November 15, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 145663
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI77FEM43
- Page: https://openairdocs.org/ntsb/CHI77FEM43

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2246  77/9/26    CARROLLTON,MI       HILLER UH-12B       CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 37, 310
        TIME - 0956                    N94735              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 127 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          CARROLLTON,MI               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               TAXI: AERIAL TAXI TO TAKEOFF
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED CLEARANCE
        FACTOR(S)
           WEATHER - UNFAVORABLE WIND CONDITIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      60
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           10                                                      VFR
        TYPE OF FLIGHT PLAN
          NONE
         FIRE AFTER IMPACT
        REMARKS- WIND GUSTING 20K.
```

## Aircraft

- Registration: [N94735](https://openairdocs.org/aircraft/N94735), registered now, S/N 523, built 1953 (OpenAirDocs)
- Reported make and model: HILLER UH-12B
- Registry model: [Hiller UH-12B](https://openairdocs.org/model/hiller-uh-12b) (registry code 4360110) (OpenAirDocs)
- Registry engine: [Franklin 6A4200 series](https://openairdocs.org/engine/franklin-6a4200-series) (registry code 27027, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed

## 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 19770926030119A](https://openairdocs.org/incident/19770926030119A), Sep 26, 1977: Hiller UH12B, Carrollton, MI, Substantial damage. Wind gusting 20K.

## Other investigations on N94735 (1)

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 CEN12LA650](https://openairdocs.org/ntsb/CEN12LA650), Sep 19, 2012: Hiller UH-12B (N94735), Rio Vista, TX, substantial damage. Probable cause: The catastrophic failure and disintegration of the No. 6 engine piston, which resulted in a total loss of engine power.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.