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SEA85LA158

1985-07-08 · PULLMAN, Washington, United States · Serious · 1 aircraft · Status: Completed

Airport PUW

N82CG has since been reassigned. It is now registered to a different aircraft (MOONEY INTERNATIONAL CORP M20TN, built 2015), which was not involved in this event.

Aircraft involved

Factual narrative

THE PLT HAD BEEN HAVING NUMEROUS PROBLEMS WITH HIS HOMEBUILT ACFT'S ENG RUNNING ROUGH BEFORE THIS FLT. SHORTLY AFTER TAKEOFF A LOSS OF PWR OCCURRED. IT WAS A HOT DAY WITH THE TEMP BEING 90 DEGS F OR BETTER. FAA INSPECTORS FOUND THE TOURQUE VALUE TO BE QUESTIONABLE ON ALL SPARK PLUGS. THE CARBURETOR AND MIXTURE CABLES SHOWED A SMALL AMOUNT OF SLIPPAGEWITHIN THE HOUSING. THE MAIN PWR WIRE PROVIDING THE NECESSARY 12 VOLTS PWR FOR THE OPERATION OF THIS SYSTEM WAS FOUND LOOSE ON THE TERMINAL OF THE ACFT'S MASTER SWITCH. TWO TOTALLY DIFFERENT IGNITION SYSTEMS HAD BEEN INSTALLED. FAA INSPECTORS STATED THAT THERE WAS NO ACCURATE MEANS OF DETERMINING THE TIMING. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1985_SEA85LA158.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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