- Date
- January 12, 1990, 11:15 local (15:15 UTC)
- Place
- Nondalton, AK
- Injuries
- 6 uninjured
- Damage
- Substantial damage
- Phase of flight
- Takeoff
- Aircraft
- N9720MCessna 207A
- Weather
- Visual (VMC) · Day
- Status
- Completed · report September 30, 1991
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- FAA report
- 19900112000469A
- Case key
- 5333
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
Improper planning/decision by the pilot. Factors related to the accident were: inadequate positioning of the temporary runway markers, snow covered runway/terrain conditions, partial whiteout condition, and the snow berms at the edges of the runway.
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
Oper psnl rprtd that during the takeoff roll, the plt enctrd partial whiteout conditions & had difficulty defining the edge of the rwy from adjacent snow berms. He aborted the takeoff, but the acft enctrd a snow berm on the left. It then veered further left & was damaged. Orange markers had been placed at the rwy edges, but they were located along the outside edges of the berms & were not clearly visible to the plt.
Aircraft
- Registration
- N9720M
- Reported as
- Cessna 207A
- Category
- Airplane
- Serial number
- 20700720
- Airframe hours
- 3,637
- Engine
- Continental IO-520-F13, 300 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Part 135
- Registered owner
- Iliamna Air Taxi
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · November 14, 1989 · 85 hours before
- Flight plan
- VFR
- Airport
- SNN · Nondalton, runway 20, 2,700 × 60 ft, gravel
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
- 42
- Certificate
- Airline transport
- Airplane ratings
- Single-engine land, Multi-engine land, Single-engine sea
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 13,069 total · 2,000 in this make and model · 12,734 as pilot in command · 151 in the last 90 days · 66 in the last 30 days · 6 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 3 statute miles
- Lowest ceiling
- 800 ft broken
- Temperature
- 25 °F, dew point 19 °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.