OAK74AP015

NTSB accident investigation · Hughes 269C · Oakland, CA · October 2, 1973

Accident · FatalClosed
Date
October 2, 1973
Place
Oakland, CA · OAKLAND, CA
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N9628FHughes 269C
Status
Completed · report March 20, 1974
Report
Brief approved by the director
Safety recommendations
Yes
Case key
79872

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
----------------------------------------------------------------------------------------------------------------------------
3-3942   73/10/2   OAKLAND,CALIF       HUGHES 269C         CR-  2  0  0  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 2039                    N9628F              PX-  0  0  0  POLICE PATROL             AGE 47, 4326 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            1800 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          OAKLAND,CALIF               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: BUILDING(S)                               LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR DRIVE SHAFT
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         FIRE AFTER IMPACT
        REMARKS- M/R GR DRIVE SHAFT FAILED. HIT CONDUIT PIPE & PATIO ROOF.CRASHED IN YARD.

Aircraft

Registration
N9628F
Reported as
Hughes 269C
Category
Helicopter
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.

Other investigations on N9628F · 1

Matched to the same aircraft by N-number and date.