# NTSB OAK75AP029: Beech A60, N2855W, Mammoth Lakes, CA, January 2, 1975

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: January 2, 1975
- Place: Mammoth Lakes, CA · MAMMOTH LAKES, CA
- Location: 37.6244° N, 118.9884° W: Placed by OpenAirDocs: center of Mammoth Lakes, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.6244&lon=-118.9884&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 5 fatal
- Status: Completed, report May 23, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 148176
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK75AP029
- Page: https://openairdocs.org/ntsb/OAK75AP029

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0832   75/1/2    MAMMOTH LAKES,CA    BEECH A60           CR-  1  0  0  NONCOMMERCIAL             COMMERCIAL, AGE 44, 2400
        TIME - 0835                    N2855W              PX-  4  0  0  BUSINESS                  TOTAL HOURS, UNK/NR IN
                                       DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        NAME OF AIRPORT - MAMMOTH LAKES
        DEPARTURE POINT             INTENDED DESTINATION
          MAMMOTH LAKES,CA            SANTA ANA,CA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       TAKEOFF: INITIAL CLIMB
           STALL                                                    IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           POWERPLANT - PROPELLER AND ACCESSORIES: HYDRAULIC PITCH CONTROL MECHANISM
           MISCELLANEOUS ACTS,CONDITIONS - ACTION,LACK OF
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
         FIRE AFTER IMPACT
        REMARKS- PROP OVERSPEED DUE CONGEALED OIL.DIDNT EXERCISE PROPS BFOR TKOF.LOST CTL.
```

## Aircraft

- Registration: [N2855W](https://openairdocs.org/deregistered/N2855W-1975-06-11), registration cancelled 1975-06-11, S/N P-229 (OpenAirDocs)
- Reported make and model: BEECH A60
- Registry model: [Beech A60](https://openairdocs.org/model/beech-a60) (registry code 1153604) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Mammoth Lakes

## 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 19750102008949A](https://openairdocs.org/incident/19750102008949A), Jan 2, 1975: Beech A60, Mammoth Lakes, CA, Destroyed, 4 fatal. Prop overspeed due congealed oil. Didnt exercise props bfor tkof. Lost ctl.

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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