- Date
- April 9, 1988, 12:15 local (17:15 UTC)
- Place
- Sioux Falls, SD
- Injuries
- 3 uninjured
- Damage
- Substantial damage
- Phase of flight
- Approach
- Aircraft
- N33SVAgusta A109A
- Weather
- Visual (VMC) · Day
- Status
- Completed · report February 28, 1989
- Report
- Approved by Office Director
- Safety recommendations
- Yes
- FAA report
- 19880409012419A
- Case key
- 17463
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
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.
Airframe/component/system failure/malfunction
Rotor drive system,tail rotor drive shaft bearing - disintegratedCause
Rotor drive system,tail rotor drive shaft - shearedCause
Maintenance,lubrication - not performedCause
Loss of control - in flight
Directional control - not possible
Main gear collapsed
Landing gear,main gear attachment - overload
Aircraft
- Registration
- N33SV
- Reported as
- Agusta A109A
- Category
- Helicopter
- Serial number
- 7154
- Airframe hours
- 2,303
- Engine
- Allison 250-C20B, 420 horsepower, turbo shaft
- Damage
- Substantial damage
- Flight
- Positioning · Part 91
- Operator
- Rocky Mountain Helicopters
- Registered owner
- Icon Group Inc.
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · July 20, 1987 · 5 hours before
- Departed
- 1SD9 · Sioux Falls, SD
- Airport
- FSD · Joe Foss Field
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 44
- Certificates
- Airline transport, Commercial
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Helicopter, Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Right
- Flight hours
- 13,615 total · 120 in this make and model · 13,150 as pilot in command · 50 in the last 90 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 350° at 23 knots, gusting 35
- Visibility
- 15 statute miles
- Lowest ceiling
- None
- Temperature
- 46 °F, dew point 25 °F
- Altimeter
- 30.00 inHg
- Observed at
- FSD
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.