DEN93FA075

NTSB accident investigation · Wiley Pitts S-1-E · Walters, OK · July 8, 1993

Accident · FatalField investigationFinal report
Date
July 8, 1993, 09:15 local (14:15 UTC)
Place
Walters, OK
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N70BWWiley Pitts S-1-E
Weather
Visual (VMC) · Day
Status
Completed · report September 13, 1994
Report
Approved by Office Director
FAA report
19930708022789A
Case key
11080

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

Performance of an aerobatic maneuver at an altitude insufficient for adequate terrain clearance.

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 flightManeuvering
Aerobatics - performedPilot in command
Altitude - inadequatePilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - open field

Analysis

Witnesses reported the pilot made several low passes over their rural homes. The pilot's father-in-law then saw the airplane flying south along the highway in an inverted attitude and at low altitude. He said the pilot attempted an 'outside recovery' but instead of levelling off, the airplane continued descending until ground impact. Construction on the airplane had recently been completed. At the accident site the recording tachometer read 27:10 hours.

Factual narrative

History of flight

On July 8, 1993, at approximately 0915 central daylight time, a Wiley Pitts S-1-E, N70BW, impacted terrain while maneuvering approximately five miles northeast of Walters, Oklahoma. The pilot was fatally injured and the airplane was destroyed. Visual meteorological conditions prevailed at the time and no flight plan was filed for the personal flight.

Witnesses, including the pilot's father-in-law, reported the airplane made several low passes over their farm. The father-in-law said he observed the airplane flying south along the highway in an inverted attitude and at low altitude; he further reported that the pilot attempted an "outside recovery." A neighbor said he saw the airplane roll several times, pull up, then descend straight down.

Wreckage and impact information

The airplane impacted a soft plowed field. The rear portion of the fuselage, just behind the cockpit, was bent and was aligned on a magnetic heading of 060 degrees. A crush line on the nose of the airplane was measured at between 15 and 20 degrees. The nose was headed 035; the tail was headed 060.

According to rescuers, the fuel tank, located in the center section of the top wing, was ruptured and leaking fuel on the ground when they arrived on the scene and during body removal. The right wing was slightly ahead of the left wing. Flight control continuity was established with the exception of the elevator trim tab cable, which had been cut by rescuers.

Medical and pathological information

An autopsy was performed on the pilot by the Oklahoma State Medical Examiner's Office. There was no evidence of any physiological event that could have been causal to the accident.

Toxicology protocol was negative for the presence of ethanol, carbon monoxide, cyanide, or drugs.

Additional information

The first flight occurred on February 12, 1993. At the accident site, the recording tachometer indicated 27:10 total hours. According to the pilot's wife, this was the only aerobatic airplane her husband had flown.

Aircraft

Registration
N70BW
Reported as
Wiley Pitts S-1-E (PITTS S-1-)
Category
Airplane, amateur-built
Serial number
8-0130
Airframe hours
27
Engine
Lycoming IO-360-A1A, 180 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Wiley, Loyd W.
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · May 1, 1993 · 2 hours before

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
65
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Toxicology
Performed
Flight hours
18,900 total · 27 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 20 knots
Visibility
20 statute miles
Lowest ceiling
None
Altimeter
29.00 inHg
Observed at
LAW, 15 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.