DEN99LA052

NTSB accident investigation · Piper PA-18 · Leadville, CO · March 14, 1999

Accident · No injuriesLimited investigationFinal report
Date
March 14, 1999, 13:45 local (20:45 UTC)
Place
Leadville, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N90995Piper PA-18
Weather
Visual (VMC) · Day
Status
Completed · report June 22, 2000
Report
Approved by Office Director
FAA report
19990314047729A
Case key
45917

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 compensation for the gusty crosswind conditions. A factor was the gusting crosswind

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 - in flightLanding - flare/touchdown
Compensation for wind conditions - inadequatePilot in commandCause
Weather condition - crosswindFactor
Weather condition - gustsFactor
Nose overLanding - roll
Terrain condition - snow covered

Analysis

The pilot set up to land midfield on runway 34 with winds reported to be from 300 degrees at 8 knots. According to the pilot, during the landing flare the airplane encountered a 'strong' direct crosswind gust. The airplane departed the right side of the runway, and nosed over in deep snow.

Factual narrative

On March 14, 1999, approximately 1345 mountain standard time, a Piper PA-18 Super Cub, N90995, was substantially damaged following departure from the side of the runway during landing roll and nosing over in the snow at Lake County Airport, Leadville, Colorado. The private pilot, the sole occupant in the airplane, was not injured. The airplane was being operated by the owner under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the cross-country personal flight which originated from Colorado Springs, Colorado, approximately 1 hour, 35 minutes before the accident. No flight plan had been filed.

The pilot said that as he approached Leadville from the south, he heard on the airport's UNICOM that the winds were 320 degrees at 8 knots, and that runway 33 was the active runway. As the pilot approached the airport, he requested airport advisories, and was told that the wind was 300 degrees at 8 knots. The pilot reported that he set up for a midfield landing. As he began to flare, a "strong direct crosswind gust suddenly struck the airplane." The pilot said that he attempted to perform a go-around, but departed the right side of runway 34. The airplane nosed over in one foot deep snow. The right wing and rudder were damaged.

The pilot noted that after the accident, the windsock, located near the center of the runway, was standing "almost straight out, and was perpendicular to the runway (with winds from the west)." He further observed that this midfield gusting wind condition continued for approximately 20 minutes.

Aircraft

Registration
N90995
Reported as
Piper PA-18
Category
Airplane
Serial number
18-8109057
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Robert A. Hannaman
Airworthiness certificate
Standard, Utility
Departed
00V · Colo Springs, CO
Destination
LXV · CO
Airport
LXV · Lake County Airport, runway 34, 6,400 × 75 ft, asphalt

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
47
Certificate
Private
Airplane ratings
Single-engine sea, Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
198 total · 38 in this make and model · 128 as pilot in command · 5 in the last 90 days · 3 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 12 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
43 °F, dew point 10 °F
Altimeter
30.00 inHg
Observed at
LXV

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.