APALACHICOLA, FL, USA
N1212L
LAKE LA-4
SHORTLY AFTER TAKEOFF AT ABOUT 100' AGL, THE ENG LOST POWER. AN EMERG LNDG WAS THEN MADE IN A SWAMPY AREA & THE ACFT, WAS DAMAGED. AN EXAM OF THE ENG REVEALED THAT THE #1 EXHAUST VALVE PUSHROD WAS BENT. ACCORDING TO THE ENG MANUFACTURERTHIS RESULTED FROM A STICKING EXHAUST VALVE, WHICH ALLOWED THE PISTON TO CONTACT THE VALVE. THE VALVE STEM CAP HAD FAILED & LODGED BETWEEN THE ROCKER ARM AND THE OUTER VALVE SPRING ASSEMBLY.
BINDING AND SUBSEQUENT FAILURE OF THE #1 EXHAUST VALVE. A FACTOR RELATED TO THE ACCIDENT WAS: THE SOFT/WET (SWAMPY) TERRAIN CONDITION IN THE EMERGENCY LANDING AREA.
Source: NTSB Aviation Accident Database
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