CHI93DEC01

NTSB accident investigation · Bradford Pietenpol Skyscout · Eaton Rapids, MI · August 21, 1993

Accident · Minor injuriesFinal report
Date
August 21, 1993, 16:20 local (20:20 UTC)
Place
Eaton Rapids, MI
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N4301DBradford Pietenpol Skyscout
Weather
Visual (VMC) · Day
Status
Completed · report September 30, 1994
Report
Approved by Office Director
FAA report
19930821029889A
Case key
9135

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 failure to maintain airspeed which resulted in an inadvertant stall. Factors related to the accident were the low altitude and the restricted movement of the carburetor needle.

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 engine power(partial) - mech failure/malfTakeoff - initial climb
Fuel system,carburetor - movement restrictedFactor
Loss of control - in flightDescent - emergency
Airspeed - not maintainedPilot in commandCause
Stall - inadvertentPilot in command
Altitude - inadequatePilot in commandFactor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

During initial climbout from takeoff, the homebuilt airplane's engine surged once according to the pilot statement. Upon clearing trees located along the departure path, the pilot stated he turned the airplane to the right at an altitude of 30 feet above ground level. During the turn the pilot stated the airplane stalled and collided with the ground. Post accident inspection revealed the carburetor needle and seat were burred. The needle would stick in the closed position when seated.

Factual narrative

History of flight

On August 21, 1993 at 1620 hours, EDT, a Pietenpol Sky Scout, N4301D registered to Kyle R. Bradford of Eaton Rapids, Michigan and operated by a Commercially certified pilot crashed in a plowed field east of the owners private airfield. The accident occurred during the takeoff phase of operation while on a pleasure flight. VFR weather conditions existed at the time, and no flight plan was filed. The aircraft received substantial damage and the pilot received minor injuries.

Aircraft information

The home built Pietenpol aircraft, N4301D was built in 1992. The aircraft maintenance records indicate that the aircraft was certified and maintained in accordance with the FARs. The records also indicate the aircraft has accumulated approximately 90.5 hours of time in service since manufacture date.

Wreckage and impact information

The aircraft was substantially damaged on ground impact. The left wing tip, which took the initial impact, was badly damaged for approximately 5 feet. The right wing was intact and received very little damage. The fuselage received damage only at the forward side, where the engine mounts to fuselage because of the engine impact to the ground. The right main landing gear strut received major damage and was partially torn form the fuselage at the weld joint. The left main landing gear strut received very little damage.

Medical and pathological information

The pilot received cuts and bruised in the eye and nose area with a broken nose. He received eight stitched and was released from the Eaton Rapids Medical Facility. He also has a very sore back.

Additional information

The carburetor, manufacture; Zenith, series 267, universal type, was removed from engine and a teardown inspection conducted. Found the Float Needle/Seat burred and would stick in the closed position when the defects of the Needle matched the defects of the Seat. The wreckage was released to the owner on August 24, 1993, via a NTSB Form 6120.15.

Aircraft

Registration
N4301D
Reported as
Bradford Pietenpol Skyscout
Category
Airplane, amateur-built
Serial number
01
Airframe hours
91
Engine
Continental W4A AUTOSATAR, 32 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Kyle R. Bradford
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · August 12, 1993 · 5 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
Certificates
Airline transport, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
23,200 total · 75 in this make and model · 14,300 as pilot in command · 45 in the last 90 days · 12 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Visibility
15 statute miles
Lowest ceiling
None
Temperature
77 °F, dew point 54 °F
Altimeter
30.00 inHg
Observed at
JXN, 20 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.