Aircraft Accident/Incident Report

Gunnison, Colorado 81230
Saturday, July 28, 2001 7:50 MDT

NTSB Narrative Summary Released at Completion of Accident

According to the pilot, after takeoff, he climbed to 9,700 feet msl in order to cross the mountains. The airplane then encountered a "300 foot updraft, and then a 2,000 foot downdraft." He decided to "land the plane without the use of the landing gear on the side of the mountain." One of the passengers said it was the pilot's first mountain flying experience. He remembered the airplane was at 80 knots and 8,300 feet as they approached a mountain. He said the pilot pulled back on the control yoke in an attempt to gain sufficient altitude to clear the peak but the airplane was slow in responding and "we literally came straight down" and "the belly [struck the ground] pretty hard." According to rescue personnel, the accident site was at 8,510 feet. The straight line distance between the airport and the accident site was 9 nm. The difference in accident elevation and airport elevation (8,510 - 7,673) was 837 feet. The computed climb rate was 93 feet per nm. Estimated airplane weight was 2,670 pounds at takeoff (maximum certificated gross weight is 2,650 pounds). The altimeter setting was 30.49 inches of mercury, and the computed pressure altitude was 7,103 feet msl. Referring to the Cessna 172RG "Maximum Rate of Climb" chart and interpolating, it was computed that the airplane was capable of achieving a climb rate of 464 fpm (feet per minute) and, at a climb speed of 79 knots, it was capable of climbing 352.4 feet per nm.

NTSB Probable Cause Narrative

the pilot's failure to attain the proper climb rate, and his improper inflight planning/decision to attempt to cross mountainous terrain at an inadequate altitude. Contributing factors were the downdraft and the pilot's total lack of experience in mountain flying.

Event Information

Type of Event Accident
Event Date 7/28/2001
Event Day of the Week Saturday
Time of Event 750
Event Time Zone Mountain Daylight Time
Event City Gunnison
Event State COLORADO
Event Country --
Zipcode of the event site 81230
Event Date Year 2001
Event Date Month 7
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 382958N
Event Location Longitude 1064804W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness Not pertinent
Investigator's weather source Weather Observation Facility
Time of the weather observation 855 Mountain Daylight Time
Direction of event from weather observation facility (degrees) 288
Weather Observation Facility ID GUC
Elevation of weather observation facility 7673
Distance of event from weather observation facility (units?) 9
Time Zone of the weather observation MDT
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 8
Air Temperature at event time (in degrees celsius) 14
Dew Point at event time (in degress fahrenheit) 6
Wind Direction (degrees magnetic) --
Variable Wind Indicator Variable
Wind Speed (knots) --
Wind Velocity Indicator Light and Variable
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.49
Density Altitude (feet) 8609
Intensity of Precipitation --
METAR weather report --
Event Highest Injury Serious
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None --
Injury Total Serious 3
Injury Total All 3
Investigating Agency NTSB
NTSB Docket Number (internal use) 11471
NTSB Notification Source FAA NW OPERATIONS CENTER
NTSB Notification Date Jul 28 2001 12:00AM
NTSB Notification Time 1331
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Feb 20 2002 1:46PM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Denver, Colorado

Aircraft Involved

Aircraft #1

Aircraft Registration Number N401TA
NTSB Number DEN01LA130
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Destroyed
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Cessna
Aircraft Model 172RG
Aircraft Series Identifier --
Aircraft Serial Number 172RG0142
Certified Max Gross Weight 2650
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 4
Number of Engines 1
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection 100 Hour
Date of Last Inspection Jul 19 2001 12:00AM
Airframe hours since last inspection 13
Airframe Hours 6269
ELT Installed Unknown
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name Top Notch Aviation, Inc.
Aircraft Owner Street Address P.O. Box 5161
Aircraft Owner City Austin
Aircraft Owner State TX
Aircraft Owner Country USA
Aircraft Owner Zipcode 78763
Operator is an individual? No
Operator Name --
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City --
Operator State --
Operator Country --
Operator Zip code --
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation --
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board --
Departure Point Same as Event Yes
Departure Airport Code GUC
Departure City Gunnison
Departure State CO
Departure Country USA
Departure Time 730
Departure Time Zone MDT
Destination Same as Local Flt --
Destination Airport Code AUS
Destination City Austin
Destination State TX
Destination Country USA
Specific Phase of Flight Climb
Report sent to ICAO? No
Evacuation occurred --
Date of most recent change to record Jan 28 2002 10:48AM
User who most recently changed record MCBM
Since inspection or accident Time of Accident
Event Location Runway Number and Location --
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --