# NTSB LAX71DUG93: Hughes 269B, N9437F, Duarte, CA, June 15, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 15, 1971
- Place: Duarte, CA · DUARTE, CA
- Location: 34.1609° N, 117.9505° W: Placed by OpenAirDocs: center of Duarte, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.1609&lon=-117.9505&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report February 14, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 161951
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX71DUG93
- Page: https://openairdocs.org/ntsb/LAX71DUG93

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2080  71/6/15    DUARTE,CALIF        HUGHES 269B         CR-  0  0  2  MISCELLANEOUS             COMMERCIAL, AGE 50, 9630
        TIME - 1210                    N9437F              PX-  0  0  0  SEARCH AND RESCUE         TOTAL HOURS, 1820 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          LONG BEACH,CALIF            DUARTE,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     IN FLIGHT: HOVERING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        REMARKS- ACFT OPERATING AT A DENSITY ALT OF 7600 FT.PLT WENT BEYOND CAPABILITIES OF ACFT,SETTLED IN TREES.
```

## Aircraft

- Registration: [N9437F](https://openairdocs.org/deregistered/N9437F-2013-09-11), registration cancelled 2013-09-11, S/N 55-0192, built 1965 (OpenAirDocs)
- Reported make and model: HUGHES 269B
- Registry model: [Hughes 269B](https://openairdocs.org/model/hughes-269b) (registry code 4470502) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N9437F (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 LAX72FUA36](https://openairdocs.org/ntsb/LAX72FUA36), May 22, 1972: Hughes 269B (N9437F), Long Beach, CA, substantial damage
- [NTSB LAX70F0181](https://openairdocs.org/ntsb/LAX70F0181), Nov 4, 1969: Hughes 269B (N9437F), Long Beach, 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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