# NTSB OAK70AP055: Beech T-34A, N7721B, Mammoth Lakes, CA, May 9, 1970

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: May 9, 1970
- 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: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 serious
- Status: Completed, report October 23, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 127293
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK70AP055
- Page: https://openairdocs.org/ntsb/OAK70AP055

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1232   70/5/9    MAMMOTH LAKES,CAL   BEECH T-34A         CR-  1  1  0  MISCELLANEOUS             COMMERCIAL, AGE 33, 614
        TIME - 1139                    N7721B              PX-  0  0  0  SEARCH AND RESCUE         TOTAL HOURS, 110 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          FRESNO,CALIF                SEARCH AREA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL                                                    IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           COPILOT - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           WEATHER - DOWNDRAFT,UPDRAFTS
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, IN PERSON
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        MISSING AIRCRAFT - LATER RECOVERED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      35
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      OTHER
        REMARKS- RECOVERY DATE 5/10/70. ACFT ON CAP SEARCH BASE FLT PLAN LOOKING FOR MISSING ACFT IN MTNS.
```

## Aircraft

- Registration: [N7721B](https://openairdocs.org/deregistered/N7721B-1970-08-19), registration cancelled 1970-08-19, S/N G-144 (OpenAirDocs)
- Reported make and model: BEECH T-34A
- Registry model: [Beech A45](https://openairdocs.org/model/beech-a45) (registry code 1152006) (OpenAirDocs)
- Category: Airplane
- 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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