NTSB Identification: LAX91FA190.
The docket is stored on NTSB microfiche number 45280.
Accident occurred Thursday, May 02, 1991 in QUINCY, CA
Probable Cause Approval Date: 02/08/1993
Aircraft: MOONEY M20F, registration: N9624M
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 PLANNED A NONSTOP FLT FM WA TO CA, & HE RECD PREFLT WEATHER BRIEFINGS SHOWING GENERALLY VFR CONDITIONS. ENROUTE, THE PLT AMENDED HIS ROUTE & LANDED AT KLAMATH FALLS, OR. DURING ROLLOUT THE ACFT NEARLY VEERED OFF THE SIDE OF THE RWY. THE PLT TOLD ATC HE NEEDED A REST STOP & HE HAD HAD A FLAP PROBLEM. WITNESSES REPORTED THE PLT LOOKED "NERVOUS, UNDECIDED & BEWILDERED." THE PLT CONTINUED HIS S-BND CIRCLING ROUTE OF FLT WHICH PLACED TEH ACFT OVER THE WESTERN SLOPES OF THE SIERRA NEVADA MTNS AT ELE OVER 7000 FT MSL. 40 MI WEST LAY THE CENTRAL VALLEY OF CA, ELE 300 FT MSL. WHILE CRUISING AT 13,000 FT THE PLT REVERSED COURSE & DISAPPEARED FM RADAR. THE ACFT CRASHED INVERTED INTO 4900 FT MSL TERRAIN, ABT 1.5 FM ITS LAST RADAR POSITION. WITNESSES REPORTED IT WAS RAINING HEAVILY & LIGHTNING WAS VISIBLE. THE PLT HAD NOT LOGGED ANY INST FLT TIME IN 19 YRS. HIS TOTAL TIME WAS 88 HRS. HIS TOTAL PIC TIME IN THE ACFT (WHICH HE HAD PURCHASED 3 WKS BEFORE THE ACCIDENT) WAS 0.5 HRS.

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

THE PILOT'S INADVERTENT FLIGHT INTO IMC AND THEREAFTER HIS FAILURE TO MAINTAIN DIRECTIONAL CONTROL OF HIS AIRPLANE. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT RELATED TO THE PILOT'S IMPROPER WEATHER EVALUATION WHICH RESULTED IN HIS DELAYED EMERGENCY PROCEDURE, DISORIENTATION AFTER ENTERING CLOUDS AND RAIN, AND TO HIS LACK OF RECENT FLYING EXPERIENCE AND EXPERIENCE IN THE MODEL OF AIRPLANE.

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