ANC95LA013

NTSB accident investigation · Cessna 207 · Akiachak, AK · November 18, 1994

Accident · No injuriesLimited investigationFinal report
Date
November 18, 1994, 17:30 local (21:30 UTC)
Place
Akiachak, AK
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9829MCessna 207
Weather
Visual (VMC) · Day
Status
Completed · report June 29, 1995
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19941118040759A
Case key
2612

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's inadequate compensation for crosswind. Crosswind conditions and an icy runway surface were factors in the accident.

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.

Loss of control - on ground/waterLanding - roll
Airport facilities,runway/landing area condition - icyFactor
Weather condition - crosswindFactor
Compensation for wind conditions - inadequatePilot in commandCause
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - snowbankFactor

Analysis

The pilot was landing a wheel equipped airplane at a remote airport as part of a scheduled charter flight with two passengers. The pilot had landed at the airport earlier in the day and was aware that the runway surface was covered with snow and ice. When the airplane touched down, the airplane weathervaned to the left into an 18 knot crosswind. The pilot's input of rudder and nose wheel steering had no effect. The airplane slid off the departure end of the runway and down an embankment into a snow bank.

Factual narrative

On November 18, 1994, at 1730 Alaska standard time, a wheel equipped Cessna model 207 airplane, N9829M, operated by Ryan Air Service, Inc., overran the end of runway 29 at Akiakchak, Alaska and collided with terrain. The commercial certificated pilot-in-command and his two revenue passengers, the sole occupants, were not injured, and the airplane sustained substantial damage. The 14 CFR Part 135 scheduled flight last departed Akiak, Alaska at 1722 and the destination was Akiakchak. The pilot reported that visual meteorological conditions prevailed, and the flight was on a company VFR flight plan.

On the morning of November 22, 1994, the NTSB investigator- in-charge interviewed the pilot at the NTSB's Northwest Field Office. The pilot said that he had been into the airport earlier in the day and knew that the runway was snow covered and very icy. The two flights were nearly identical with the exception being that the earlier approach and landing were performed in a nearly calm wind. On the flight in question, he made the approach/landing with the wind sock indicating a direct crosswind from the left of about 18 knots. The plane touched down within 75 feet of the approach end of the runway with full flaps and the stall horn blaring. Shortly thereafter, the airplane began to weathervane to the left into the wind. The input of rudder and nose wheel steering had no noticeable affect in aligning the nose of the airplane with the centerline of the runway. The airplane continued off the departure end of the runway and down a 20 degree embankment with resultant damage to the left horizontal stabilizer and elevator.

The airport/facility directory indicated in part: "Airport unattended - Caution; runway condition not monitored, recommend visual inspection prior to using."

Aircraft

Registration
N9829M
Reported as
Cessna 207
Category
Airplane
Serial number
20700741
Airframe hours
5,661
Engine
Continental IO-520-F, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Ryan Air Service Inc.
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · November 15, 1994 · 5 hours before
Departed
AKI · Akiak, AK
Flight plan
Company VFR
Airport
Z13 · Akiakchak, runway 29, 1,600 × 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
24
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
1,496 total · 175 in this make and model · 1,280 as pilot in command · 220 in the last 90 days · 90 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 18 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
18 °F, dew point 16 °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 N9829M · 1

Matched to the same aircraft by N-number and date.