What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Engine began to run rough and smoke, oil spray from engine compartment. Power loss and forced landing resulted. (.4)the pilot reported that during the climb-out following a touch-and-go landing, the engine began to run rough, followed by smoke/oil spray issuing from the engine compartment. Shortly thereafter, he heard a loud bang and executed a forced landing in deep grass and vegetation. During the landing roll, the airplane nosed down, and the left wing was damaged. FAA on site examination revealed oil pooled beneath the engine and oil spray within the engine compartment. The examination also revealed a crack in the steel barrel of the #4 cylinder. The #4 cylinder was removed for analysis. Optical examination of the apparent fracture surfaces on cylinder #4 uncovered fracture markings, arrest lines and deformation patterns consistent with fatigue progression over the entire surface of the original crack. The cause of the metal smearing and hairline cracks most likely was induced during the turning operation when cutting tools had become worn. It was concluded that the surface features were of a nature non-detectable by existing non-destru ctive testing processes. (-23)pilot departed runway 34 at Independence, Oregon and experienced a puff of smoke and a loud bang after which the aircraft lost power. The pilot made an emergency landing in a field adjacent to the runway. No injuries, but the aircraft received substantial damage in the landing.
As the FAA filed it
ENGINE BEGAN TO RUN ROUGH AND SMOKE, OIL SPRAY FROM ENGINE COMPARTMENT. POWER LOSS AND FORCED LANDING RESULTED. (.4)THE PILOT REPORTED THAT DURING THE CLIMB-OUT FOLLOWING A TOUCH-AND-GO LANDING, THE ENGINE BEGAN TO RUN ROUGH, FOLLOWED BY SMOKE/OIL SPRAY ISSUING FROM THE ENGINE COMPARTMENT. SHORTLY THEREAFTER, HE HEARD A LOUD BANG AND EXECUTED A FORCED LANDING IN DEEP GRASS AND VEGETATION. DURING THE LANDING ROLL, THE AIRPLANE NOSED DOWN, AND THE LEFT WING WAS DAMAGED. FAA ON SITE EXAMINATION REVEALED OIL POOLED BENEATH THE ENGINE AND OIL SPRAY WITHIN THE ENGINE COMPARTMENT. THE EXAMINATION ALSO REVEALED A CRACK IN THE STEEL BARREL OF THE #4 CYLINDER. THE #4 CYLINDER WAS REMOVED FOR ANALYSIS. OPTICAL EXAMINATION OF THE APPARENT FRACTURE SURFACES ON CYLINDER #4 UNCOVERED FRACTURE MARKINGS, ARREST LINES AND DEFORMATION PATTERNS CONSISTENT WITH FATIGUE PROGRESSION OVER THE ENTIRE SURFACE OF THE ORIGINAL CRACK. THE CAUSE OF THE METAL SMEARING AND HAIRLINE CRACKS MOST LIKELY WAS INDUCED DURING THE TURNING OPERATION WHEN CUTTING TOOLS HAD BECOME WORN. IT WAS CONCLUDED THAT THE SURFACE FEATURES WERE OF A NATURE NON-DETECTABLE BY EXISTING NON-DESTRU CTIVE TESTING PROCESSES. (-23)PILOT DEPARTED RUNWAY 34 AT INDEPENDENCE, OREGON AND EXPERIENCED A PUFF OF SMOKE AND A LOUD BANG AFTER WHICH THE AIRCRAFT LOST POWER. THE PILOT MADE AN EMERGENCY LANDING IN A FIELD ADJACENT TO THE RUNWAY. NO INJURIES, BUT THE AIRCRAFT RECEIVED SUBSTANTIAL DAMAGE IN THE LANDING.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.