NTSB Identification: LAX85FA073.
The docket is stored on NTSB microfiche number 27423.
Accident occurred Sunday, December 16, 1984 in GRAND CANYON, AZ
Aircraft: MOONEY M20J, registration: N4812H
Injuries: 4 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 PLT RECEIVED A WX BRIEFING AND WAS ADVISED OF MODERATE RIME AND MIXED ICING IN CLOUDS. HE FILED AN IFR FLT PLAN AND DEPARTED. WHILE AT 12000 FT, HE REPORTED ENCOUNTERING SEVERE RIME ICE AND REQUESTED A LOWER ALTITUDE. HE STATED THATHE WAS TRYING TO FLING OFF PROPELLER ICE WHEN RADAR AND RADIO CONTACT WERE LOST. THE WRECKAGE WAS LOCATED IN REMOTE MOUNTAINOUS TERRAIN BY A GROUND PARTY DIRECTED TO THE SITE BY AN AIR FORCE ACFT WHICH MONITERED A ELT SIGNAL.

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

WEATHER CONDITION..ICING CONDITIONS

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

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



Contributing Factors

IMPROPER DECISION..PILOT IN COMMAND

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