NTSB Identification: SEA92FA026B
Accident occurred Saturday, December 07, 1991 in SNOHOMISH, WA
Probable Cause Approval Date: 04/27/1993
Aircraft: PIPER PA-23-250, registration: CFAEC
Injuries: 7 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.

DURING A VFR CROSS COUNTRY FLIGHT ON A VFR FLIGHT PLAN FROM BOUNDARY BAY, CANADA, TO SEATTLE, WASHINGTON, THE CANADIAN REGISTERED PIPER PA-23-250 WAS INVOLVED IN A MID-AIR COLLISION WITH A CESSNA 172 THAT WAS OPERATING ON AN IFR FLIGHT PLAN, PRACTICING APPROACHES AT EVERETT, WASHINGTON. THE COLLISION OCCURRED AT 2,200 FEET IN VMC. THE CESSNA WAS PERFORMING A MISSED APPROACH PROCEDURE AND HAD BEEN INSTRUCTED TO TURN TO 70 DEGREES AND MAINTAIN 2,000 FEET. THE CANADIAN AIRPLANE WAS TRAVELLING IN A SOUTHERLY DIRECTION OPERATING BELOW AN OVERCAST LAYER IN VMC. THE CANADIAN AIRPLANE WAS NOT IN COMMUNICATION WITH ATC AT THE TIME. THE CESSNA WAS IN COMMUNICATION WITH SEATTLE ARTCC AND WAS AWAITING FURTHER INSTRUCTIONS WHEN THE COLLISION OCCURRED. POST-CRASH TOXICOLOGICAL TESTING REVEALED THAT THE PILOT TESTED POSITIVE FOR TETRAHYDROCANNABINOL IN BLOOD AND THC IN BLOOD AND URINE.

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

A VISUAL LOOKOUT WAS NOT MAINTAINED.

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