# NTSB MIA69F0004: Hiller UH-12, N9790C, Manati, PR, May 17, 1968

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: May 17, 1968
- Place: Manati, PR · MANATI,PR, PR
- Location: 18.4313° N, 66.4771° W: Placed by OpenAirDocs: center of Manatí, PR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=18.4313&lon=-66.4771&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious, 1 minor
- Status: Completed, report July 16, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 110416
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA69F0004
- Page: https://openairdocs.org/ntsb/MIA69F0004

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1548  68/5/17  NR.MANATI,PR          HILLER UH-12        CR-  0  1  0  COMMERCIAL                PRIVATE, AGE 32, 615
        TIME - 1015                    N9790C              PX-  0  1  1  MAPPING/PHOTO             TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      IN FLIGHT: NORMAL CRUISE
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: MAIN ROTOR HEAD ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  PROP/ENGINE VIBRATION
        REMARKS- POLICE PHOTO MISSION.CONTROL ROTOR BLADE ASSEMBLY,P/N36209-3,SEPARATED FROM CONTROL ROTOR CUFF.
```

## Aircraft

- Registration: [N9790C](https://openairdocs.org/deregistered/N9790C-2013-05-30), registration cancelled 2013-05-30, S/N 2218, built 1963 (OpenAirDocs)
- Reported make and model: HILLER UH-12
- 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: Destroyed

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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