# NTSB LAX74DUJ24: Hiller Acft UH-12B, N7299, Tucson, AZ, September 28, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 28, 1973
- Place: Tucson, AZ · TUCSON, AZ
- Location: 32.2217° N, 110.9265° W: Placed by OpenAirDocs: center of Tucson, AZ, within about 9 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.2217&lon=-110.9265&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 4, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 188375
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX74DUJ24
- Page: https://openairdocs.org/ntsb/LAX74DUJ24

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3095  73/9/28    TUCSON,ARIZ         HILLER ACFT UH-12B  CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1700                    N7299               PX-  0  0  0  DUAL                      AGE 25, 2119 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            205 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - FREEWAY
        DEPARTURE POINT             INTENDED DESTINATION
          TUCSON,ARIZ                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: PISTON,PISTON RINGS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - PRESSURE TOO LOW
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- LOST OIL PRESS,HOLE IN NR 1 PISTON. M/R BLADES STRUCK TAIL BOOM DRG LDG.
```

## Aircraft

- Registration: [N7299](https://openairdocs.org/aircraft/N7299), registered now, S/N 729, built 1955 (OpenAirDocs)
- Reported make and model: HILLER ACFT UH-12B
- Registry model: [Hiller UH-12B](https://openairdocs.org/model/hiller-uh-12b) (registry code 4360110) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Freeway

## 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 19730928031789A](https://openairdocs.org/incident/19730928031789A), Sep 28, 1973: Hiller UH12B, Tucson, AZ, Substantial damage. Lost oil press,hole in nr 1 piston. M/r blades struck tail boom drg ldg.

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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