# NTSB MIA80FA069: Hiller UH-12D, N9299Z, Miami Beach, FL, June 15, 1980

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: June 15, 1980
- Place: Miami Beach, FL · MIAMI BEACH, FL
- Location: 25.8114° N, 80.1449° W: Placed by OpenAirDocs: center of Miami Beach, FL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=25.8114&lon=-80.1449&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 2 uninjured
- Status: Completed, report August 25, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 130481
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA80FA069
- Page: https://openairdocs.org/ntsb/MIA80FA069

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1685  80/6/15  NR.MIAMI BEACH,FL     HILLER UH-12D       CR-  0  1  0  COMMERCIAL                COMMERCIAL, AGE 32, 6300
        TIME - 1645                    N9299Z              PX-  0  0  2  OTHER                     TOTAL HOURS, 56 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - CITY OF MIAMI HEL
        DEPARTURE POINT             INTENDED DESTINATION
          MIAMI,FL                    LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR GEAR BOX
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON WATER
        REMARKS- SUN GEAR,P/N 23530-3,TOOTH HARDNESS MEASURED 35RC,MANUF SPECS REQUIRE 60RC.
```

## Aircraft

- Registration: [N9299Z](https://openairdocs.org/aircraft/N9299Z), registered now, S/N 1150 (OpenAirDocs)
- Reported make and model: HILLER UH-12D
- Registry model: [Hiller UH-12D](https://openairdocs.org/model/hiller-uh-12d) (registry code 4360118) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: City Of Miami Hel

## 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 19800615045749A](https://openairdocs.org/incident/19800615045749A), Jun 15, 1980: Hiller UH12D, Miami Beach, FL, Substantial damage. Helicopter crashed during emergency landing in water after transmission failure.

## Other investigations on N9299Z (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 MIA78DKT08](https://openairdocs.org/ntsb/MIA78DKT08), Oct 22, 1977: Hiller Acft UH-12D (N9299Z), Miami, FL, 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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