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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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August 28, 1985 · Welch AVID Flyer · N64LW

Bonner'S Ferry, ID

Overview

Report Status
Preliminary report
Event Type
Accident
Date
August 28, 1985
Injury Outcomes
No injuries (2 uninjured)
Location
Bonner'S Ferry, ID
Aircraft
Welch AVID Flyer
Tail Number
N64LW
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA85LA204

THE PLT REPORTED THAT DURING TAKEOFF, THE ENG SEIZED AS THE ACFT WAS CLIMBING THRU ABOUT 350 FT AGL OVER THE END OF THE RWY. HE STATED THAT THE ACFT WAS IN A MAXIMUM CLIMB WHEN THE ENG SEIZED & IMMEDIATELY WENT INTO A POWER OFF STALL. HE RECOVERED FROM THE STALL, BUT THERE WERE TREES AHEAD. WHILE MANEUVERING TO AVOID THE OBSTACLES, THE ACFT TOUCHED DOWN IN A SKID & THE RIGHT MAIN GEAR COLLAPSED. THE ACFT HAD A 2 CYLINDER, 2 CYCLE, 43 HP ENG THAT WAS EQUIPPED WITH 2 CARBURETORS & A SINGLE IGNITION SYSTEM. AN EXAM OF THE ENG REVEALED THAT THE MIXTURE FOR THE #1 CARBURETOR HAD BECOME LEAN WHICH ALLOWED THE #1 CYLINDER TO OVERHEAT. SUBSEQUENTLY, THE PISTON IN THE #1 CYLINDER SEIZED AS THE ACFT WAS CLIMBING AFTER TAKEOFF.

Full Narrative

THE PLT REPORTED THAT DURING TAKEOFF, THE ENG SEIZED AS THE ACFT WAS CLIMBING THRU ABOUT 350 FT AGL OVER THE END OF THE RWY. HE STATED THAT THE ACFT WAS IN A MAXIMUM CLIMB WHEN THE ENG SEIZED & IMMEDIATELY WENT INTO A POWER OFF STALL. HE RECOVERED FROM THE STALL, BUT THERE WERE TREES AHEAD. WHILE MANEUVERING TO AVOID THE OBSTACLES, THE ACFT TOUCHED DOWN IN A SKID & THE RIGHT MAIN GEAR COLLAPSED. THE ACFT HAD A 2 CYLINDER, 2 CYCLE, 43 HP ENG THAT WAS EQUIPPED WITH 2 CARBURETORS & A SINGLE IGNITION SYSTEM. AN EXAM OF THE ENG REVEALED THAT THE MIXTURE FOR THE #1 CARBURETOR HAD BECOME LEAN WHICH ALLOWED THE #1 CYLINDER TO OVERHEAT. SUBSEQUENTLY, THE PISTON IN THE #1 CYLINDER SEIZED AS THE ACFT WAS CLIMBING AFTER TAKEOFF.

Flight

Event TypeAccident
Event Time06:30 PDT
Nearest Airport0nm N
Runway20
Runway Length4000 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftWelch AVID Flyer
Tail NumberN64LW
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsCuyuna · 430RR · Reciprocating · 43
Seats2

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 64 · Second Class

Conditions

ConditionsVMC
LightDaylight
WindCalm
Visibility30 sm
CeilingNone
Temperature / Dew Point61 F / 0 C
Altimeter0
Observation Time06:30
Weather SourcePILO

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Appendix: Source Data