DEN01LA117

NTSB accident investigation · Piper PA-12 · Eagle, CO · June 24, 2001

Accident · No injuriesLimited investigationFinal report
Date
June 24, 2001, 12:00 local (18:00 UTC)
Place
Eagle, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N7850HPiper PA-12
Weather
Visual (VMC) · Day
Status
Completed · report July 25, 2002
Report
Approved by Office Director
Parties
FAA-- Flight Standards District Office
FAA report
20010624018029A
Case key
52552

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 inadequate wind evaluation, and his inadequate planning/decision to land with a tailwind, at a density altitude of 13,418 feet. Contributing factors were the tailwind and the high density altitude weather condition.

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.

In flight encounter with weatherApproach - vfr pattern - final approach
In-flight planning/decision - inadequatePilot in commandCause
Weather evaluation - inadequatePilot in commandCause
Weather condition - tailwindFactor
Weather condition - high density altitudeFactor
In flight collision with terrain/waterGo-around (vfr)
Terrain condition - rising
Terrain condition - tundra

Analysis

The pilot was practicing off runway landings in the tundra at approximately 11,000 feet. He selected a landing area, made a few passes to inspect the site, and decided to land uphill. On short final, he "realized that my sink rate was higher than I was comfortable with, and my groundspeed was too high." He applied full power, but contacted the ground while the airplane was in a crab. Both main landing gear were broken off, and the wings were bent. The pilot said that after he exited the airplane, he noted that he had landed with a 20 knot quartering tailwind. He also stated that the ambient air temperature at the crash site was 60 degrees Fahrenheit. The calculated density altitude was 13,418 feet.

Factual narrative

On June 24, 2001, at approximately 1200 mountain daylight time, a Piper PA-12, N7850H, was substantially damaged when it collided with terrain near Eagle, Colorado. The private pilot, the sole occupant in the airplane, was not injured. The pilot was operating the airplane under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the personal flight which originated from Boulder Municipal Airport, Boulder, Colorado, at approximately 1030. The pilot did not file a flight plan.

According to the pilot's written statement, he was planning to fly "more or less" direct to Castle Peak (approximately 9 miles northeast of Eagle County Regional Airport) to look for landing sites on BLM (Bureau of Land Management) land. He identified a potential landing site at approximately 11,000 feet elevation. He decided he would attempt an approach from the west, uphill. On short final, he "realized that my sink rate was higher than I was comfortable with, and my groundspeed was too high," and he tried to go-around. He applied full power, but was unable to clear the terrain. The airplane was in a 30 degree crab, and the pilot attempted to correct it back to the ground track by adding right rudder. The right main landing gear contacted the ground, and the airplane turned approximately 180 degrees and came to rest in about 100 feet. The landing gear separated from the fuselage, both wings were wrinkled on top, and the cowling was bent.

The pilot said that after he exited the airplane, he observed that he had landed with a 20 knot quartering tailwind. He also stated that the ambient air temperature at the crash site was 60 degrees Fahrenheit; the calculated density altitude was 13,418 feet.

Aircraft

Registration
N7850H
Reported as
Piper PA-12
Category
Airplane
Serial number
12-750
Airframe hours
3,000
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Ralph A. Young
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 1, 2001 · 5 hours before
Departed
1V5 · Boulder, CO
Destination
1V5 · Boulder, CO

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
37
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
June 21, 2000
Seat
Front
Flight hours
377 total · 222 in this make and model · 304 as pilot in command · 52 in the last 90 days · 16 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 10 knots, gusting 19
Visibility
10 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 41 °F
Altimeter
30.22 inHg
Observed at
KEGE, 8 nm away

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 N7850H · 1

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