FTW98LA237

NTSB accident investigation · Cessna 170A · Provo, UT · May 24, 1998

Accident · No injuriesLimited investigationFinal report
Date
May 24, 1998, 14:00 local (20:00 UTC)
Place
Provo, UT
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9732ACessna 170A
Weather
Visual (VMC) · Day
Status
Completed · report February 15, 2001
Report
Approved by Office Director
FAA report
19980524015589A
Case key
20622

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

failure of the pilot to maintain directional control of the airplane. A related factor was the right quartering tailwind gust.

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 - on ground/waterLanding
Weather condition - tailwindFactor
Weather condition - crosswindFactor
Weather condition - gustsFactor
Directional control - not maintainedPilot in commandCause
Airframe/component/system failure/malfunctionLanding - roll
Landing gear,wheel - overload
Landing gear,wheel - separation

Analysis

The pilot said that as he approached his destination, he was unable to contact either the airport or other air traffic to obtain wind information to find out which runway was in use. Flying over the airport, he saw that the wind sock indicated the winds were calm, so he landed on runway 13. He said the airplane 'felt soft on the left side' and began 'weaving' down the runway. The left wheel broke off the landing gear, and the airplane ground looped. A witness told the pilot he thought he 'may have experienced a right quartering tail wind gust.' An FAA inspector, who examined the airplane, said the failure appeared to be overload.

Factual narrative

On May 24, 1998, approximately 1400 mountain daylight time, N9732A, a Cessna 170A, was substantially damaged during landing at Provo, Utah. The commercial pilot was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the personal flight conducted under Title 14 CFR Part 91. The flight originated in Payson, Arizona, with intermediate stops in Page, Arizona, and Panguitch, Utah. The flight departed Panguitch approximately 1100.

In his accident report, the pilot said that as he approached his destination, he was unable to contact either the airport or other air traffic to obtain wind information and to find out what runway was in use. Flying over the airport, he saw that the wind sock indicated the winds were calm so he landed on runway 13. The airplane "felt soft on the left side" and began "weaving" down the runway. The left wheel broke off the landing gear and the airplane ground looped. A witness told the pilot he thought he "may have experienced a right quartering tail wind gust."

An FAA inspector who examined the airplane said the failure appeared to be overload.

Aircraft

Registration
N9732A
Reported as
Cessna 170A
Category
Airplane
Serial number
19193
Airframe hours
4,796
Engine
Continental O-300-B, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Ralph A. Clark
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · February 2, 1998 · 24 hours before
Departed
U55 · Panguitch, UT
Destination
PVU
Airport
PVU · Provo Municipal, runway 13, 7,091 × 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
58
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
582 total · 38 in this make and model · 582 as pilot in command · 34 in the last 90 days · 22 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 39 °F
Altimeter
30.00 inHg
Observed at
SLC, 36 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.