OAK70AP055

NTSB accident investigation · Beech T-34A · Mammoth Lakes, CA · May 9, 1970

Accident · FatalClosed
Date
May 9, 1970
Place
Mammoth Lakes, CA · MAMMOTH LAKES, CA
Injuries
1 fatal, 1 serious
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N7721BBeech T-34A
Status
Completed · report October 23, 1970
Report
Brief approved by the director
Case key
127293

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

NTSB brief

NTSB’s brief of the accident, as it was printed: the coded facts, with the probable cause and factors.

----------------------------------------------------------------------------------------------------------------------------
 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
Reported as
Beech T-34A
Category
Airplane
Engine
reciprocating
Damage
Destroyed

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.