SEA01LA137

NTSB accident investigation · Piper PA-20-135 · Redmond, OR · July 19, 2001

Accident · No injuriesLimited investigationFinal report
Date
July 19, 2001, 13:08 local (20:08 UTC)
Place
Redmond, OR
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N8901CPiper PA-20-135
Weather
Visual (VMC) · Day
Status
Completed · report February 20, 2002
Report
Approved by Office Director
Parties
FAA - Portland FSDO
FAA report
20010719016499A
Case key
52769

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's inadequate compensation for wind conditions during landing. A factor was variable winds.

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.

Tail gear collapsedLanding
Weather condition - variable windFactor
Compensation for wind conditions - inadequatePilot in commandCause
Dragged wing,rotor,pod,float or tail/skidLanding

Analysis

Upon arrival at Redmond, the pilot was instructed to enter traffic for runway 28. On his first landing attempt, he bounced "moderately" and decided to go around. He reported that on his second approach, winds had increased and were variable. He stated that on this approach, the flare and initial rollout went well but that "the continuing rollout swerved to the left and did not respond well to correction." The pilot therefore decided to go around again, stating in his accident report: "Although I was unsure at the time whether I made contact or avoided a runway light, evidence on the aircraft indicates that a contact did occur." The pilot reported that at this point, he contacted the tower and told them that he was having trouble with crosswind on runway 28. The control tower then offered runway 4. The pilot stated that on the third approach, "I placed the aircraft with good speed control at the center of the runway while holding against a moderate crosswind from the left", but that "Within a few feet...a crosswind (seemingly quartering tailwind) from the right lifted the right wing", and that the aircraft then "arced immediately to the left" and subsequently ground looped at low speed. The aircraft's tailwheel collapsed during the ground loop. The pilot stated that at the approximate time of the accident, "two windsocks were visible indicating moderately strong winds in 180 degree opposite directions on the same runway." According to a special weather observation taken at Redmond at 1310, winds were variable between 280 and 010 degrees true at 8 knots.

Factual narrative

On July 19, 2001, approximately 1308 Pacific daylight time, a Piper PA-20-135 airplane, N8901C, was substantially damaged in a ground loop during landing on runway 4 at Roberts Field, Redmond, Oregon. The private pilot, whose application to register the aircraft in his name was pending with the FAA, and one passenger were not injured in the accident. Visual meteorological conditions were reported at Redmond in a special observation taken at 1310. The aircraft was on a visual flight rules (VFR) flight plan from Pullman, Washington, to Ashland, Oregon, and according to the pilot, the aircraft departed its last departure point of Pendleton, Oregon, about 1030.

The pilot stated that upon arrival at Redmond, he was instructed to enter traffic for runway 28 (7,006 feet by 100 feet grooved asphalt, according to the U.S. Government Airport/Facility Directory [A/FD].) The pilot stated that on his first landing attempt, he "bounced moderately and decided to go around and re-land to work on better landing technique." He reported that on his second approach, winds had increased and were variable. He stated that on this approach, the flare and initial rollout went well but that "the continuing rollout swerved to the left and did not respond well to correction." The pilot stated that he therefore decided to go around again, and stated: "Although I was unsure at the time whether I made contact or avoided a runway light, evidence on the aircraft indicates that a contact did occur." The pilot reported that at this point, he contacted the tower and told them that he was having some trouble with crosswind on runway 28. The control tower then offered runway 4 (7,040 feet by 150 feet grooved asphalt, per the A/FD.) The pilot stated that on the third approach, "I placed the aircraft with good speed control at the center of the runway while holding against a moderate crosswind from the left." He reported that "Within a few feet, however, a crosswind (seemingly quartering tailwind) from the right lifted the right wing", and that the aircraft then "arced immediately to the left." The pilot stated that he believed he was holding full right rudder at this point, but that the plane did not respond, with differential braking being "initially impossible or ineffective as the plane was on left main gear only." He reported that "The plane slowed and did its final swing at a low rate of speed (8-10 mph)." He stated that the tailwheel then began castering and then collapsed to the left, stating that "A bolt holder on the side of a shackle caging the spring had failed with side-load." The pilot stated that at the approximate time of the accident, "two windsocks were visible indicating moderately strong winds in 180 degree opposite directions on the same runway." According to a special weather observation taken at Redmond at 1310, winds were variable between 280 and 010 degrees true at 8 knots.

Aircraft

Registration
N8901C
Reported as
Piper PA-20-135
Category
Airplane
Serial number
20-1032
Airframe hours
1,625.8
Engine
Lycoming O-290-D2, 135 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 3, 2001 · 19.4 hours before
Departed
PDT · Pendleton, OR
Destination
RDM · Redmond
Flight plan
VFR
Airport
RDM · Roberts Field, runway 04, 7,040 × 150 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
57
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
July 24, 2000
Seat
Left
Flight hours
200 total · 22 in this make and model · 129 as pilot in command · 25 in the last 90 days · 25 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 45 °F
Altimeter
29.94 inHg
Observed at
RDM

FAA reports on this event · 1

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