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Atlas / NTSB / BFO94LA035

NTSB CAROL · Event

Event BFO94LA035

1994-01-25 GAITHERSBURG, Maryland, United States Airport · GAI None 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

THE PILOT'S FAILURE TO MAINTAIN ROTOR RPM WHICH LED TO AN IN FLIGHT LOSS OF CONTROL RESULTING IN A COLLISION WITH THE RUNWAY AND THE HELICOPTER ROLLING OVER ON ITS SIDE. A FACTOR IN THIS ACCIDENT WAS THE PILOT'S LACK OF TOTAL EXPERIENCE FLYING HELICOPTERS.

Factual narrative

On January 25, 1994 about 1605 hours eastern standard time, a Robinson R-22A, N8559A entered an uncontrolled descent from hovering flight, collided with the runway, and rolled over at Gaithersburg Airport, Gaithersburg, Maryland. The helicopter sustained substantial damage and the certificated private pilot was not injured. The local area instructional flight was being operated by Montgomery Aviation, Limited at the time. Visual meteorological conditions prevailed and a flight plan was not filed. According to an FAA safety inspector, at the time of the accident, the pilot had a private pilot certificate with a single engine airplane rating. The pilot was in the process of being trained to fly helicopters and did not have a helicopter rating. The FAA safety inspector examined the helicopter after the accident and did not find any pre-existing anomalies. In his written statement, the pilot said that during his supervised solo flight, he made his fourth approach to the runway and then began to hover the helicopter. He said the low RPM warning light illuminated and he "...rolled throttle and lowered collective, nose yawed left and gained altitude. Lowered collective (I believe) and left skid touched ground. Bounced on both skids and returned on ground on left skid. Then started dynamic rollover." Neither the pilot nor the operator reported any pre-existing deficiencies for the helicopter prior to the accident. The pilot was in the process of being trained to fly helicopters and did not have a helicopter rating. The pilot had accumulated about 19 hours of total helicopter flight time when the accident occurred. He did possess a private pilot fixed wing certificate at the time of the accident. The pilot was performing a supervised solo and was hovering over the runway at the termination of his fourth approach. He said the low RPM light illuminated and he lowered the collective. He lost control of the helicopter and it descended to the runway. The helicopter bounced on both skids and returned to the runway. The helicopter's left skid contacted the runway and the helicopter rolled over. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1994_BFO94LA035.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type or causal vocabulary (loss of control). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗