- Date
- November 27, 1999, 16:15 local (21:15 UTC)
- Place
- Coudersport, PA
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Takeoff
- Aircraft
- N940BBell 47G
- Weather
- Visual (VMC) · Day
- Status
- Completed · report March 2, 2001
- Report
- Approved by Office Director
- FAA report
- 19991127047829A
- Case key
- 47842
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 improper preflight planning and decision to attempt a takeoff with the passenger from the confined area.
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 with a passenger, landed the helicopter in a clearing that was about 40 feet wide, by 150 feet long, and surrounded by 'very tall trees.' The pilot said he made a normal run-up and lifted the helicopter to a hover. He used full throttle and maintained 3,100 RPM. When the helicopter started to accelerate forward, at about 12-15 knots, the RPM dropped to 3,000 and the pilot lowered collective to keep the RPM from dropping further. The helicopter's main rotor blades contacted a pine tree about 30 feet above the ground. The helicopter then rolled to the left and impacted the ground. The elevation at the accident site was about 1,800 feet Ms. The pilot did not report any mechanical malfunctions with the helicopter's airframe or engine. After the accident, the pilot stated that the helicopter was with-in it's maximum gross weight; however, the helicopter did not have enough power available to climb and he should have never landed in the clearing.
Factual narrative
On November 27, 1999, about 1615 Eastern Standard Time, a Bell 47G, N940B, was substantially damaged when it struck a tree while departing from a clearing near Coudersport, Pennsylvania. The certificated private pilot and a passenger were not injured. Visual meteorological conditions prevailed and no flight plan had been filed for the personal flight conducted under 14 CFR Part 91.
Earlier in the day, the pilot and passenger departed a private heliport in Glen Rock, Pennsylvania, and flew to the Grand Canyon State Airport (N38), Wellsboro, Pennsylvania, where the helicopter was refueled. They then departed N38, and landed in a clearing, located about 1/2 mile northwest of Coudersport.
According to the pilot, the clearing was about 40 feet wide, by 150 feet long, and was surrounded by "very tall trees." The pilot said he made a normal run-up and lifted the helicopter to a hover. He used full throttle and maintained 3,100 RPM. When the helicopter started to accelerate forward, at about 12-15 knots, the RPM dropped to 3,000 and the pilot lowered collective to keep the RPM from dropping further. The helicopter's main rotor blades contacted a pine tree about 30 feet above the ground. The helicopter then rolled to the left and impacted the ground.
According to a Federal Aviation Administration Inspector, the elevation at the accident site was about 1,800 feet msl.
The pilot did not report any mechanical malfunctions with the helicopter's airframe or engine.
After the accident, the pilot stated that the helicopter was with-in it's maximum gross weight; however, the helicopter did not have enough power available to climb and he should have never landed in the clearing.
Aircraft
- Registration
- N940B
- Reported as
- Bell 47G
- Category
- Helicopter
- Serial number
- 672
- Airframe hours
- 7,510
- Engine
- Franklin 6V-355-A, 210 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- Lawrence W. Vance
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · July 7, 1999 · 32 hours before
- Departed
- NONE
- Destination
- NONE · Glen Rock, PA
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
- 28
- Certificate
- Private
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 156 total · 76 in this make and model · 18 as pilot in command · 14 in the last 90 days · 11 in the last 30 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 260° at 12 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- 7,500 ft
- Temperature
- 50 °F, dew point 34 °F
- Altimeter
- 29.00 inHg
- Observed at
- ELM, 56 nm away
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 N940B · 2
Matched to the same aircraft by N-number and date.