NTSB Identification: NYC88FA042.
The docket is stored on NTSB microfiche number 38255.
Accident occurred Saturday, November 14, 1987 in DANBY, VT
Probable Cause Approval Date: 07/03/1989
Aircraft: MOONEY M20K, registration: N252ZF
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 PILOT WAS ON A VFR CROSS COUNTRY FLIGHT WHEN THE AIRCRAFT DESCENDED RAPIDLY AND COLLIDED WITH TREES. SEVERAL WITNESSES REPORTED HEARING EXTENSIVE ENGINE SURGES. WITNESSES REPORTED SEEING THE ACFT MANEUVERING IN A HIGHLY ERRATIC MANNER, THEN BEGIN A NOSE DIVE FOLLOWED BY ACFT ROTATION. ALL THE WITNESSES STATED THAT THEY HEARD THE ACFT'S ENGINE SURGE TO A HIGH SETTING JUST PRIOR TO IMPACT. THE ACFT WAS HEADING WEST WHEN IT IMPACTED IN A 40 DEGREE NOSE DOWN ATTITUDE AND A 45 DEGREE RIGHT BANK. THE ACFT DEBRIS WERE SCATTERED THROUGHOUT A 100 BY 200 FOOT AREA OF THE DENSELY FORRESTED, HARD GROUND. THE AREA FORECAST INCLUDED MOUNTAIN OBSCURATIONS, MODERATE RIME OR MIXED ICING, AND TURBULENCE WITH VISIBILITIES BETWEEN 3 TO 5 MILES. THE LOCAL WEATHER WAS AS FORECAST ACCORDING TO LOCAL WITNESSES AND BY AIRLINE EMPLOYEES.

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

FLIGHT INTO KNOWN ADVERSE WEATHER..ATTEMPTED..PILOT IN COMMAND

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

VFR FLIGHT INTO IMC..INADVERTENT..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

WEATHER CONDITION..ICING CONDITIONS


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..TURBULENCE


Contributing Factors

WEATHER EVALUATION..POOR..PILOT IN COMMAND


Contributing Factors

SPATIAL DISORIENTATION..PILOT IN COMMAND

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