GENERAL INFORMATION FOR NTSB REPORT: ANC00LA015
Data Source NTSB AVIATION ACCIDENT/INCIDENT DATABASE
NTSB Report Nbr ANC00LA015
Event Id 20001212X20064
Local Date 11/16/1999
Local Time 1020
State AK
Airport Name DILLINGHAM
Event Type ACCIDENT
Injury Severity MINOR
Record Status
Mid Air Collision NO
Event Location ON AIRPORT/AIRSTRIP

WEATHER INFORMATION
Weather Briefing Complete UNKNOWN
Basic Weather Conditions VISUAL METEOROLOGICAL COND
Light Condition DAY
Cloud Condition UNKNOWN
Cloud Height above Ground Level (ft) 0
Ceiling Height above Ground Level (ft) 1000
Cloud Type OVERCAST
Visibility RVR (ft) 0
Visibility RVV (sm) 0
Visibility (sm) 20
Wind Direction (deg) 40
Wind Condition Flag U
Wind Speed (knots) 5
Wind Condition Indicated Unknown

AIRCRAFT INFORMATION
Aircraft 1
Type of Operation PART 135: AIR TAXI & COMMUTER
Registration Number N9933M
Aircraft Make CESSNA
Aircraft Model 207
Aircraft Series A
Aircraft Damage SUBSTANTIAL
Aircraft Fire NONE
Aircraft Explosion NONE
Aircraft Type AIRPLANE
Aircraft Homebuilt UNKNOWN
Phase of Flight TAKEOFF
Aircraft Use UNKNOWN
Category of Operation NON-SCHEDULED
Flight Plan Filed COMPANY VFR
Domestic/International DOMESTIC
Passenger/Cargo CARGO
Operator Name YUTE AIR ALASKA
Operator Doing Business As
Owner Name WILLIAM L. JOHNSON
Number of Seats 8
Number of Engines 1
ELT Installed YES
ELT Operated NO
Departure Airport Id DLG
Departure City
Departure State ALASKA
Last Departure Point YES
Destination Airport Id KNW
Destination City NEW STUYAHOK
Destination State ALASKA
Runway Id 1
Runway Length 6404
Runway Width 150
Air Carrier Operating Certificates YES
Air Carrier Other Operating Certificates UNKNOWN
Rotocraft/Agriculture Operating Certificate UNKNOWN
Cert Max Gross Wgt 3800

ENGINE INFORMATION

Aircraft 1 - Engine : #1
Engine Manufactuer Continental
Engine Model IO-520F
Engine Horsepower 300
Engine Thrust HP
Carb/Injection FUEL INJECTED

INJURY INFORMATION
Injury Summary for Aircraft 1
Fatal Serious Minor None
Crew 0 0 0 0
Pass 0 0 0 0
Total 0 0 1 0
Sequence of Events for Aircraft 1
Occurrence #1
LOSS OF CONTROL - IN FLIGHT
Phase of Operation: TAKEOFF - INITIAL CLIMB

Events Sequence for Occurrence #1 of Aircraft 1
Event Seq # Event Group Code Subject Modifier Personnel Cause/Factor
1 2 ICE/FROST REMOVAL FROM AIRCRAFT NOT PERFORMED PILOT IN COMMAND CAUSE
2 2 STALL/MUSH INADVERTENT PILOT IN COMMAND CAUSE

Occurrence #2
IN FLIGHT COLLISION WITH TERRAIN/WATER
Phase of Operation: EMERGENCY LANDING AFTER TAKEOFF

Events Sequence for Occurrence #2 of Aircraft 1
Event Seq # Event Group Code Subject Modifier Personnel Cause/Factor
1 1 TERRAIN CONDITION RUNWAY




AIRCRAFT 1 PRELIMINARY REPORT


On November 16, 1999, at 1020 Alaska standard time, a Cessna 207A airplane, N9933M, sustained substantial damage when it impacted terrain 50 feet west of runway 01 during takeoff from the Dillingham Airport, Dillingham, Alaska. The solo commercial pilot received minor injuries. The flight was operated by Yute Air Alaska, Inc., of Anchorage, Alaska, under 14 CFR Part 135 as a cargo and mail flight to New Stuyahok, Alaska. Visual meteorological conditions prevailed at the time of the accident, and a company VFR flight plan was in effect. During a telephone interview with the NTSB investigator-in-charge (IIC) on November 17, the pilot stated that he taxied to the end of the 6,404 feet long by 150 feet wide runway, and made a full length takeoff. He said the pretakeoff engine runup was normal, as was the takeoff run and liftoff. He indicated that about 30 feet above the ground, the engine "missed, quivered, and lost power." The pilot also stated that the low voltage light came on between the takeoff and impact. He said the airplane drifted to the left of the runway, he was not able to get back over the asphalt before contacting the ground, so he leveled the wings and landed. The nose landing gear broke off, and the airplane nosed over. He told the NTSB IIC that the cargo load was 1,100 pounds, and the airplane contained about 1/2 of a full fuel load. The weather observation for Dillingham at 0950 was: wind from 040 degrees at 5 knots, 20 miles visibility, a ceiling of 1,000 feet overcast, a temperature of 7 degrees Fahrenheit, and a dew point of 3 degrees Fahrenheit. Witnesses described light frost on airplanes parked at the airport the morning of the accident. The pilot told the NTSB IIC that there was light frost on the airplane, but no more than he had seen before. He added that other small airplanes had departed that morning with frost adhering to their wings. The NTSB IIC estimated the takeoff weight between 3,700 pounds and 3,800 pounds. The maximum allowable takeoff weight for the Cessna 207A is 3,800 pounds. The accident flight was the first flight since the engine and propeller assembly was replaced. The engine had been ground operated, but not flown, since installation on this airplane. The engine had about 800 hours since overhaul, and about 5 hours in operation on a different airplane since a teardown inspection for a propeller strike. On December 20, 1999, an undamaged propeller was installed on the accident engine, and the engine operated on the airframe by an FAA airworthiness inspector. The engine started, and was operated up to 1,000 rpm for four minutes. Due to possible crankshaft damage, the engine was not operated at a higher power. The crankshaft was subsequently removed for non-destructive inspection, and found to be cracked. The mechanical fuel pump, fuel controller, and fuel distribution manifold were removed and flow tested on April 3, 2000, under supervision of an NTSB investigator. Flow rates and discharge pressures of all three components were found to meet the manufacturer's specifications.

AIRCRAFT 1 FINAL REPORT


After takeoff the airplane did not climb above 30 feet, drifted left of the runway, and settled onto the ground. The pilot stated the engine 'missed, quivered, and lost power.' He also stated there was light frost on the airplane, but that other small airplanes had departed with similar frost. The engine had been installed on the airplane the day prior to the accident, and had been operated on the ground, but not flown. After the accident, an undamaged propeller was installed, and the engine was operated at 1,000 rpm for 4 minutes. The engine-driven fuel pump, fuel controller, and fuel distributor and nozzles were tested. These components all produced the normal fuel flows and pressures specified by the manufacturer.

AIRCRAFT 1 CAUSE REPORT


Failure of the pilot to remove frost from the wings prior to flight, and the resulting inadvertent stall/mush.


END REPORT