FAA incident report · Agusta A109 · Sioux Falls, SD · February 6, 1987
From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Engine shutdown due to excessive oil temperature. Returned and found a defective thermal relief valve.
ENGINE SHUTDOWN DUE TO EXCESSIVE OIL TEMPERATURE. RETURNED AND FOUND A DEFECTIVE THERMAL RELIEF VALVE.