# NTSB UNK73X0110: Hiller Acft UH-12B, N6055, Gothenburg, SW, April 13, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 13, 1973
- Place: Gothenburg, SW · GOTHENBURG, Sweden
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report April 22, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 173342
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK73X0110
- Page: https://openairdocs.org/ntsb/UNK73X0110

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
6-0068  73/4/13    GOTHENBURG,SWEDEN   HILLER ACFT UH-12B  CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 1320                    N6055               PX-  0  0  1  FERRY                     AGE 23, 1160 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            25 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          GOTHENBURG,SWEDEN           LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: HOVERING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           PILOT IN COMMAND - EXERCISED POOR JUDGMENT
           PILOT IN COMMAND - SELECTED UNSUITABLE TERRAIN
           TERRAIN - HIGH OBSTRUCTIONS
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
        REMARKS- 1ST FLT AFT TRANSPORT & MAINT.LOST RPM IN 30FT HOVER,LNDD IN RIVER.REPORTED BY SWEDISH GOVT.
```

## Aircraft

- Registration: [N6055](https://openairdocs.org/aircraft/N6055), registered now, S/N 598 (OpenAirDocs)
- Reported make and model: HILLER ACFT UH-12B
- Registry model: [Hiller OH-23B](https://openairdocs.org/model/hiller-oh-23b) (registry code 4360109) (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 19730413042699A](https://openairdocs.org/incident/19730413042699A), Apr 13, 1973: Hiller UH12C, Gothenburg, Substantial damage. 1St flt aft transport & maint. Lost RPM in 30FT hover,lndd in river. Reported by swedish govt.

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.