- Date
- January 15, 1998, 15:30 local (22:30 UTC)
- Place
- Magdalena, NM
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N7901SBell 47G-3B-1
- Weather
- Visual (VMC) · Day
- Status
- Completed · report February 16, 2001
- Report
- Approved by Office Director
- FAA report
- 19980115000369A
- Case key
- 20684
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 adequate main rotor rpm. A factor was a lack of recent experience in the type of operation being performed.
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 helicopter was being used in the Federal Government's predator control program. The pilot said he and his passenger were flying north and entered a draw. The prey they were chasing (a coyote) turned east and they flew over it at low airspeed and altitude. The pilot was having 'trouble maintaining rotor rpm.' With higher terrain in front and to his left, he elected to turn east in hopes of exiting the draw to the south. Trees and rough terrain forced him to continue eastward. The pilot found himself below a draw and he pulled collective control. This aggravated the low rpm condition, but the helicopter cleared the rim. On the other side of the rim, the ground sloped down at a 40 degree angle and the pilot tried to stretch his descent towards flatter terrain in an attempt to make a run-on landing. The helicopter impacted the terrain and was substantially damaged. The FAA inspector who went to the scene wrote, 'There is no apparent reason for the helicopter to have lost rpm. Review of the pilot records indicate only 14 hours of flight time in the last 90 days and no training in the last three years, and the last biennial flight review was almost 20 months ago.'
Factual narrative
On January 15, 1998, approximately 1530 mountain standard time, a Bell 47G-3B-1, N7901S, was substantially damaged when it collided with terrain while maneuvering near Magdalena, New Mexico. The commercial pilot and a passenger escaped injury. Visual meteorological conditions prevailed, and no flight plan was filed for the public use flight being conducted under Title 14 CFR Part 91. The flight originated from a ranch near Magdalena.
The helicopter was being used in the Federal Government's predator control program. The pilot said he and his passenger were flying north and entered a draw. The prey they were chasing (a coyote) turned east and they flew over it at low airspeed and altitude. The pilot was having "trouble maintaining rotor rpm." With higher terrain in front and to his left, he elected to turn east in hopes of exiting the draw to the south. Trees and rough terrain forced him to continue eastward. The pilot found himself below a draw and he pulled collective control. This aggravated the low rpm condition, but the helicopter cleared the rim. On the other side of the rim, the ground sloped down at a 40 degree angle and the pilot tried to stretch his descent towards flatter terrain in an attempt to make a run-on landing. The tail rotor guard and both skids contacted the ground and the helicopter slid 10 feet before striking a small drainage. The right skid dug into soft dirt and "catapulted the helicopter nose down into the air, tearing loose the right skid." The helicopter started to roll to the left. A main rotor blade struck the ground and pitched the helicopter back to the right. The helicopter came to rest upright. The tail boom was severed.
A Federal Aviation Administration inspector was dispatched to the scene. In his accident report (FAA Form 8020-23) the inspector wrote, "Airmen competency is in question because with the existing conditions, there is no apparent reason for the helicopter to have lost rpm. Review of the pilot records indicate only 14 hours of flight time in the last 90 days and no training in the last three years, and the last biennial flight review was almost 20 months ago."
Aircraft
- Registration
- N7901S
- Reported as
- Bell 47G-3B-1
- Category
- Helicopter
- Serial number
- 6576
- Airframe hours
- 3,293
- Engine
- Lycoming TVO-435-B1A, 270 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Public aircraft · Part 91
- Registered owner
- Desert Eagle Helicopters Inc.
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · January 4, 1998 · 10 hours before
- Departed
- NONE · Magdalena, NM
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
- 38
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Left
- Flight hours
- 1,877 total · 377 in this make and model · 1,799 as pilot in command · 14 in the last 90 days · 12 in the last 30 days · 5 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 360° at 5 knots, gusting 12
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 50 °F
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 N7901S · 3
Matched to the same aircraft by N-number and date.