# NTSB UNK64X3924: Brantly B2, N5982X, Costa Mesa, CA, September 11, 1964

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: September 11, 1964
- Place: Costa Mesa, CA · COSTA MESA, CA
- Location: 33.6659° N, 117.9123° W: Placed by OpenAirDocs: center of Costa Mesa, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.6659&lon=-117.9123&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Brief approved by the director
- NTSB case key (mKey): 182706
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X3924
- Page: https://openairdocs.org/ntsb/UNK64X3924

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0746  64/9/11    COSTA MESA CALIF    BRANTLY B2          CR-  0  0  1  NONCOMMERCIAL             STUDENT, AGE 37, 67 TOTAL
        TIME - 0815                    N5982X              PX-  0  0  0  PRACTICE                  HOURS, ALL IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
```

## Aircraft

- Registration: [N5982X](https://openairdocs.org/deregistered/N5982X-2013-08-07), registration cancelled 2013-08-07, S/N 126, built 1961 (OpenAirDocs)
- Reported make and model: BRANTLY B2
- Registry model: [Brantly B-2](https://openairdocs.org/model/brantly-b-2) (registry code 1440502) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: 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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