NTSB Identification: BFO92FA094.
The docket is stored on NTSB microfiche number 47804.
Accident occurred Thursday, July 09, 1992 in CONCORD, NH
Probable Cause Approval Date: 05/10/1993
Aircraft: MITSUBISHI MU-2B-40, registration: N220MA
Injuries: 2 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE 74 YEAR OLD PILOT AND HIS WIFE WERE ON A TRIP TO ATTEND A FUNERAL. A WITNESS, WHO HEARD THE AIRPLANE OVERHEAD, REPORTED THAT IT SOUNDED LOW AND AT LEAST ONE ENGINE WAS OPERATING. HE REPORTED THAT WHEN HE LOOKED UP, THE AIRPLANE WAS IN A DIVE, SPINNING SLOWLY; HOWEVER, THE AIRPLANE DID NOT MAKE A COMPLETE REVOLUTION. RADAR DATA SHOWED THE AIRPLANE IN A LEFT DESCENDING TURN AT APPROXIMATELY 2000 FEET PER MINUTE. THE AIRPLANE IMPACTED THE GROUND ABOUT 3 MILES WEST OF THE AIRPORT IN A NEAR VERTICAL DESCENT, AND MUCH OF THE FORWARD SECTION HAD PENETRATED THE GROUND. THERE WAS A POST-CRASH FIRE. EXAMINATION OF THE AIRPLANE AND VARIOUS ACTUATORS CONFIRMED THAT THE LANDING GEAR WAS RETRACTED, FLAPS WERE EXTENDED 5 DEGREES, ELEVATOR AND AILERON TRIM WERE NEUTRAL, AND THE RUDDER WAS POSITIONED 3 DEGREES LEFT. EXAMINATION OF THE ENGINE CONFIRMED INTERNAL/ROTATIONAL DAMAGE.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LOSS OF CONTROL DURING FLIGHT FOR UNDETERMINED REASON(S).

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