# NTSB MIA71DM066: Hiller UH12E4, N44B, Naguabo, PR, January 24, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: January 24, 1971
- Place: Naguabo, PR · NAGUABO,PR, PR
- Location: 18.2117° N, 65.7370° W: Placed by OpenAirDocs: center of Naguabo, PR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=18.2117&lon=-65.7370&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report October 28, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 159445
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA71DM066
- Page: https://openairdocs.org/ntsb/MIA71DM066

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0199  71/1/24    NAGUABO,PR          HILLER UH12E4       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 27, 1706
        TIME - 1200                    N44B                PX-  0  0  3  AIR TAXI-PASSG            TOTAL HOURS, 21 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          SAN JUAN,PR                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     LANDING: OTHER
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        REMARKS- LOW ALT,LOST RPMS ,CRASH LND IN TREETOPS.ENG CK OK.
```

## Aircraft

- Registration: [N44B](https://openairdocs.org/deregistered/N44B-2012-11-29), registration cancelled 2012-11-29, S/N 2091, built 1961 (OpenAirDocs)
- Reported make and model: HILLER UH12E4
- 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: Substantial damage

## Other investigations on N44B (2)

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 MIA68O0001](https://openairdocs.org/ntsb/MIA68O0001), Aug 29, 1967: Hiller UH12E4 (N44B), Santa Fe, RP, destroyed
- [NTSB OAK65A0074](https://openairdocs.org/ntsb/OAK65A0074), Jun 22, 1965: Hiller UH-12E (N44B), Mammoth Lakes, CA, 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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