Casualties unknown

1997-11-15: Mooney M20 (N5231B) — John A. Marshall — Big Bear, CA

Big Bear, CA, US

On November 15, 1997, a Mooney M20 (registration N5231B) operated by John A. Marshall was involved in an aviation accident near Big Bear, CA. Investigators recorded the probable cause as: VFR flight by the pilot into instrument meteorological conditions (VMC), which led to spatial disorientation, loss of aircraft control, and an uncontrolled descent into terrain. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

A non-instrument rated pilot, 10 days after receiving his private pilot certificate, took off into overcast skies with 200-foot ceilings and 3/4-mile visibility in fog. The airplane entered clouds, then descended in a steep left bank, crashing on a mountainside 0.8 miles from the airport.

Accident Details

The pilot, who held a private pilot certificate but was not instrument rated, performed a preflight inspection and taxied east to the approach end of runway 26 at an airport with an elevation of 6,748 feet. After an engine run-up, the pilot elected to take off westward on runway 26. Weather reported at the airport included an overcast ceiling at 200 feet, visibility of 3/4 mile in fog, and calm wind.

Witness Observations

Witnesses noted that to the east, the sky was clear with blue sky and the rising sun visible, while to the west and south, low clouds and restricted visibility prevailed. After takeoff, the airplane climbed into the clouds. Within 60 seconds, witnesses observed the airplane descending from the clouds in a steep left bank. The aircraft subsequently struck a mountainside 0.8 miles from the airport, at an elevation of about 6,850 feet, in a nose-low and steep left bank attitude.

Wreckage Examination

Post-crash examination of the wreckage revealed evidence of oil leakage on the airplane's belly and on the engine's exterior, with oil stains directed aft. Additionally, a puddle of oil was found on the hangar floor below where the engine would have been while the airplane was parked. However, no evidence of oil starvation, overheat distress signatures, or loss of engine power was found. The attitude indicator was noted to have a history of precession. Both the baggage compartment door and the pilot's lap belt were found unlatched. No maintenance logs were located.

Pilot Background

The accident occurred 10 days after the pilot was issued his private pilot certificate. The pilot's former flight instructor (CFI) reported that the pilot had tinkered with the engine in an attempt to stop oil leakage. The CFI also characterized the pilot as being an aggressive student.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X09193. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.