ATL87LA169

NTSB accident investigation · Piper PA-28-180 · Franklin, NC · June 8, 1987

Accident · No injuriesLimited investigationFinal report
Date
June 8, 1987, 07:50 local (11:50 UTC)
Place
Franklin, NC
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N3923RPiper PA-28-180
Weather
Visual (VMC) · Day
Status
Completed · report October 7, 1988
Report
Approved by Office Director
FAA report
19870608028339A
Case key
7450

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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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.

Airframe/component/system failure/malfunctionCruise - normal
Propeller system/accessories,blade - corrodedFactor
Propeller system/accessories,blade - fatigueCause
Propeller system/accessories,blade - separationCause
Maintenance,overhaul - inadequateManufacturerFactor
Procedure inadequateManufacturerFactor
Forced landingDescent - emergency
On ground/water collision with objectLanding - roll
Object - fence

Analysis

A 17 inch portion of one of the prop blades fractured and separated from the 76 inch dia prop while the acft was at cruise. During the forced landing the acft struck a fence post. Examination of the prop revealed the presence of filiform corrosion across the backs of both blades. Metallurgical analysis of the fracture surface revealed that the fracture originated at a corrosion pit on the blade back. Total time of the prop was 2225 hrs, the prop was reconditioned by the mfr 1241 hrs prior to the accident. The mfr recommends that this model prop be reconditioned every 1000 hrs. The original reconditioning procedure specified anodizing the prop and painting with laquer after repair. Examination of the prop indicates that this was done. The mfr has since revised the reconditioning procedure to use a chemical conversion coating instead. The mfr specifies that the prop be frequently wiped with an oily rag between reconditionings to assist in corrosion prevention.

Aircraft

Registration
N3923R
Reported as
Piper PA-28-180
Category
Airplane
Serial number
285831
Airframe hours
2,225
Engine
Lycoming O-360-A4A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
William H. Haney
Registered owner
William H Haney
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · October 28, 1986 · 53 hours before
Departed
46A · Blairsville, GA
Destination
W44 · Asheville, NC

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
42
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
535 total · 131 in this make and model · 449 as pilot in command · 35 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
330° at 5 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
64 °F

FAA reports on this event · 1

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