CHI85LA079

NTSB accident investigation · Piper PA-23-250 · New Philadelphi, OH · December 27, 1984

Accident · No injuriesLimited investigationFinal report
Date
December 26, 1984, 20:00 local (Dec 27, 1984, 01:00 UTC)
Place
New Philadelphi, OH
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N6505YPiper PA-23-250
Weather
Visual (VMC) · Night/dark
Status
Completed
Report
Approved by Office Director
FAA report
19841226070589A
Case key
12979

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

On this page

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 - separationCause
Propeller system/accessories - fatigueCause
Emergency procedure - performedPilot in command
Forced landingLanding

Analysis

Plt felt vibration and reduced power on both engines to idle. Plt heard a 'thud' and discovered the left propeller had separated cutting through the nose of the acft as it departed. The propeller was not located. Two of the six propeller bolts remained with the acft. Metallurgical exam of the two bolts revealed fatigue progression stemming from numerous origins.

Aircraft

Registration
N6505Y
Reported as
Piper PA-23-250
Category
Airplane
Serial number
27-3793
Airframe hours
9,890
Engine
Lycoming IO-540-C4B5, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Positioning · Part 91
Operator
Appalachian Aviation
Registered owner
Lewis J. Manyak
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · December 3, 1984 · 353 hours before
Departed
22I · Mcarthur, OH
Destination
ERI · Erie, PA
Flight plan
IFR

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
27
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Flight hours
19,541 total · 3,026 in this make and model · 17,577 as pilot in command · 2,826 in the last 90 days · 10 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/dark
Wind
90° at 8 knots
Visibility
12 statute miles
Lowest ceiling
8,000 ft overcast
Temperature
27 °F, dew point 18 °F
Altimeter
30.00 inHg
Observed at
CAK, 28 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.