GENERAL INFORMATION FOR NTSB REPORT: ANC00LA045
Data Source NTSB AVIATION ACCIDENT/INCIDENT DATABASE
NTSB Report Nbr ANC00LA045
Event Id 20001212X20750
Local Date 04/14/2000
Local Time 1025
State AK
Airport Name SHEEP MOUNTAIN
Event Type ACCIDENT
Injury Severity NONE
Record Status
Mid Air Collision NO
Event Location ON AIRPORT/AIRSTRIP

WEATHER INFORMATION
Weather Briefing Complete NOT PERTINENT
Basic Weather Conditions VISUAL METEOROLOGICAL COND
Light Condition DAY
Cloud Condition CLEAR
Cloud Height above Ground Level (ft) 0
Ceiling Height above Ground Level (ft) 0
Cloud Type NONE
Visibility RVR (ft) 0
Visibility RVV (sm) 0
Visibility (sm) 50
Wind Direction (deg) 0
Wind Condition Flag U
Wind Speed (knots) 0
Wind Condition Indicated Calm

AIRCRAFT INFORMATION
Aircraft 1
Type of Operation PART 91: GENERAL AVIATION
Registration Number N6446K
Aircraft Make CESSNA
Aircraft Model 150
Aircraft Series M
Aircraft Damage SUBSTANTIAL
Aircraft Fire NONE
Aircraft Explosion NONE
Aircraft Type AIRPLANE
Aircraft Homebuilt UNKNOWN
Phase of Flight UNDEFINED
Aircraft Use PERSONAL
Flight Plan Filed NONE
Operator Name MUSTANG AIR INC
Operator Doing Business As
Owner Name MUSTANG AIR, INC.
Number of Seats 2
Number of Engines 1
ELT Installed YES
ELT Operated NO
Departure Airport Id PAQ
Departure City PALMER
Departure State ALASKA
Last Departure Point NO
Destination Local DEST & DEPARTURE SAME, ACCIDENT CAN OCCUR ANYWHERE
Destination Airport Id
Destination City
Runway Id 4
Runway Length 2270
Runway Width 60
Air Carrier Operating Certificates NO
Air Carrier Other Operating Certificates UNKNOWN
Rotocraft/Agriculture Operating Certificate UNKNOWN
Cert Max Gross Wgt 1600

ENGINE INFORMATION

Aircraft 1 - Engine : #1
Engine Manufactuer Continental
Engine Model O-200-A
Engine Horsepower 100
Engine Thrust HP
Carb/Injection CARBURETOR

INJURY INFORMATION
Injury Summary for Aircraft 1
Fatal Serious Minor None
Crew 0 0 0 0
Pass 0 0 0 0
Total 0 0 0 1
Sequence of Events for Aircraft 1
Occurrence #1
ON GROUND/WATER ENCOUNTER WITH TERRAIN/WATER
Phase of Operation: LANDING - ROLL

Events Sequence for Occurrence #1 of Aircraft 1
Event Seq # Event Group Code Subject Modifier Personnel Cause/Factor
1 1 DOOR, SERVICE OPEN FACTOR
2 2 UNSUITABLE TERRAIN OR TAKEOFF/LANDING/TAXI AREA SELECTED PILOT IN COMMAND CAUSE
3 1 TERRAIN CONDITION SNOW COVERED FACTOR

Occurrence #2
NOSE OVER
Phase of Operation: LANDING - ROLL

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




AIRCRAFT 1 PRELIMINARY REPORT


On April 14, 2000, about 1025 Alaska daylight time, a wheel equipped Cessna 150M airplane, N6446K, sustained substantial damage while landing at Sheep Mountain airstrip, located about 27 miles east of Chickaloon, Alaska, at 61 degrees 48 minutes north latitude, 147 degrees 30 minutes west longitude. The airplane was being operated as a visual flight rules (VFR) personal flight under Title 14, CFR Part 91, when the accident occurred. The solo private pilot was not injured. Visual meteorological conditions prevailed, and a VFR flight plan was filed. The flight originated at the Palmer Municipal Airport, Palmer, about 0930. During a telephone conversation with the National Transportation Safety Board investigator-in-charge on April 14, the pilot reported that he had rented the airplane with the intention of flying from Palmer to the Sheep Mountain area, and return. He added that he had not planned to land at the Sheep Mountain airstrip. He said that after flying over the Sheep Mountain area, and while on his way back to the Palmer Airport, the oil dip stick access door opened. He said that he decided to return to the Sheep Mountain airstrip, close the door, and return to Palmer. The pilot reported that while landing to the west, the main wheels contacted deep snow on the runway, and the airplane nosed over. The airplane sustained substantial damage to the wings, fuselage, and engine firewall assembly. The pilot noted that there were no preaccident mechanical anomalies with the airplane.

AIRCRAFT 1 FINAL REPORT


The certificated private pilot reported that while in cruise flight, the oil dip stick access door opened. He said that he elected to land at a snow-covered, nonmaintained airstrip, and close the door. The pilot reported that while landing to the west, the main wheels contacted deep snow on the runway, and the airplane nosed over. The airplane sustained substantial damage to the wings, fuselage, and engine firewall assembly.

AIRCRAFT 1 CAUSE REPORT


The pilot's selection of an unsuitable landing area. Factors associated with the accident were an open service door, and snow-covered terrain.


END REPORT