- Date
- January 25, 1994, 16:05 local (21:05 UTC)
- Place
- Gaithersburg, MD
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N8559ARobinson R-22A
- Weather
- Visual (VMC) · Day
- Status
- Completed · report January 26, 1995
- Report
- Approved by Office Director
- FAA report
- 19940125000869A
- Case key
- 8885
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
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.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
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.
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.
Aircraft
- Registration
- N8559A
- Reported as
- Robinson R-22A
- Category
- Helicopter
- Serial number
- 468
- Airframe hours
- 3,867
- Engine
- Lycoming O-320-B2C, 160 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Operator
- Montgomery Aviation
- Registered owner
- David Carr
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · January 9, 1994 · 40 hours before
- Airport
- GAI · Montgomery Airpark, runway 14, 4,196 × 73 ft, asphalt
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 24
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--no waivers/lim.
- Seat
- Right
- Flight hours
- 95 total · 19 in this make and model · 52 as pilot in command · 24 in the last 90 days · 7 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 140° at 5 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 36 °F
- Altimeter
- 29.00 inHg
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N8559A · 1
Matched to the same aircraft by N-number and date.