ANC20CA037

NTSB accident investigation · Cessna 207 · Kwigillingok, AK · December 10, 2019

Accident · No injuriesData collectionFinal report
Date
December 9, 2019, 16:15 local (Dec 10, 2019, 01:15 UTC)
Place
Kwigillingok, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N9728MCessna 207
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report June 16, 2020
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
20191209018509I
Case key
101118

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 decision to depart from an ice-covered runway with a strong crosswind, which resulted in a loss of directional control, runway excursion, and impact with a ditch.

Findings · 6

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCessna 207A: 11 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 207A: 2 casesAll aircraft: 3,958 casesProbable cause
Runway/land/takeoff/taxi surface: snow/slush/ice covered surfaceEnvironmental issues › Physical environment · Effect on operationCessna 207A: 3 casesAll aircraft: 219 casesProbable cause
Runway/land/takeoff/taxi surface: snow/slush/ice covered surfaceEnvironmental issues › Physical environment · Decision related to conditionCessna 207A: 3 casesAll aircraft: 219 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Effect on operationCessna 207A: 4 casesAll aircraft: 1,008 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that he was departing from an ice-covered runway with a strong crosswind. After lining up on the runway, he added power and felt the airplane slide right. To correct, he applied left rudder and left brake to no avail. He reduced the engine power to idle and again applied left rudder and left brake, but the airplane continued to slide. He subsequently pulled the mixture to idle cutoff. The airplane slid off the runway and impacted a ditch, which resulted in substantial damage to the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Factual narrative

The pilot reported that he was departing an ice-covered runway in a strong crosswind. After lining up on the runway, he added power and felt the airplane slide to the right. In an effort to correct, he applied left rudder and left brake to no avail. He reduced the engine power to idle and once again applied left rudder and left brake, but the airplane continued to slide. He subsequently pulled the mixture to idle cutoff. The airplane slid off the runway and impacted a ditch sustaining substantial damage to the right wing. The pilot reported no preaccident mechanical failures or malfunctions that would have precluded normal operations.

Aircraft

Registration
N9728M
Reported as
Cessna 207 (A)
Category
Airplane
Serial number
20700721
Built
1981
Airframe hours
29,228.2
Engine
Continental IO-520-F, 285 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Operator
Grant Aviation Inc
Registered owner
Grant Aviation Inc
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · November 4, 2019
Departed
GGV · Kwigillingok, AK
Destination
BET · Bethel, AK
Flight plan
Company VFR
Airport
GGV · Kwigillingok, runway 15, 1,835 × 40 ft, dirt
Equipment
Stall warning system

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
39
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
May 14, 2019
Seat
Left
Restraint
3-point
Flight hours
1,491.8 total · 516.7 in this make and model · 121.6 in the last 90 days · 22 in the last 30 days · 2.7 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 32 knots, gusting 37
Visibility
10 statute miles
Lowest ceiling
None
Temperature
36 °F, dew point 32 °F
Altimeter
28.42 inHg

Docket · 2

The files NTSB released with the investigation on April 7, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.4 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.