Crossville Airport
Aircraft Accident/Incident Report

Crossville, Tennessee 38555
Monday, March 17, 1986 19:47 EST

NTSB Narrative Summary Released at Completion of Accident

ON TAKEOFF THE PLT SAW AN OIL LEAK AROUND THE PROP HUB. THE ACFT WAS RETURNED TO THE AIRPORT AND THE PROP GOVERNOR OIL TUBE FITTING WAS FOUND TO BE CRACKED. THE PART WAS REPLACED AND THE FLT WAS CONTINUED. THE PART WAS CHECKED DURING A LATER REFUELING STOP AND WAS NOT FOUND TO BE LEAKING. DURING CRUISE IN MOUNTAINOUS TERRAIN AN OIL LEAK WAS AGAIN SEEN. VECTORS WERE RECEIVED TO A NEARBY ARPT. THE ENG QUIT AND THE PLT ATTEMPTED AN EMERGENCY LANDING DURING WHICH THE ACFT STRUCK A TREE. EXAMINATION OF THE ENG SHOWED THAT THE OIL LINE FITTING HAD AGAIN CRACKED. BOTH FITTINGS WERE FOUND BY METALLURGICAL EXAMINATION TO HAVE FAILED DUE TO A LOW STRESS HIGH CYCLE FATIGUE INDUCED BY A HIGH MEAN TENSILE STRESS. THE OIL LINE WAS FOUND TO BE UNRESTRAINED ALTHOUGH THE SERVICE MANUAL CALLS FOR TWO CLAMPS. THE RESULTING VIBRATION INDUCED THE STRESS LOADS AS SEEN ON THE TWO FITTINGS.

NTSB Probable Cause Narrative

Not Yet Reported

Event Information

Type of Event Accident
Event Date 3/17/1986
Event Day of the Week Monday
Time of Event 1947
Event Time Zone Eastern Standard Time
Event City CROSSVILLE
Event State TENNESSEE
Event Country --
Zipcode of the event site 38555
Event Date Year 1986
Event Date Month 3
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport CROSSVILLE
Event Location Nearest Airport ID CSV
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles 3
Degrees magnetic from airport 225
Airport Elevation 1881
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1955 Eastern Standard Time
Direction of event from weather observation facility (degrees) 45
Weather Observation Facility ID CSV
Elevation of weather observation facility 1881
Distance of event from weather observation facility (units?) 3
Time Zone of the weather observation EST
Lighting Conditions Night/Dark
Lowest Ceiling Height 25000
Lowest Non-Ceiling Height 25000
Sky/Lowest/Cloud Conditions Unknown
Sky Condition for Lowest Ceiling Broken
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 12
Air Temperature at event time (in degrees celsius) 13
Dew Point at event time (in degress fahrenheit) 0
Wind Direction (degrees magnetic) 0
Variable Wind Indicator Unknown
Wind Speed (knots) 0
Wind Velocity Indicator Calm
Wind Gust Indicator Unknown
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) 1750
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 4
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 524
NTSB Notification Source --
NTSB Notification Date Mar 17 1986 12:00AM
NTSB Notification Time 2144
Fiche Number and/or location -used to find docket information 30823
Date of most recent change to record Jan 2 2001 9:14AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N7613J
NTSB Number ATL86LA099
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name PIPER
Aircraft Model PA-28R-180
Aircraft Series Identifier PA-28R-180
Aircraft Serial Number 28R-31005
Certified Max Gross Weight 2500
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 4
Number of Engines 1
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Oct 11 1985 12:00AM
Airframe hours since last inspection 102
Airframe Hours 5350
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name
Aircraft Owner Street Address
Aircraft Owner City
Aircraft Owner State
Aircraft Owner Country
Aircraft Owner Zipcode
Operator is an individual? --
Operator Name OLDACH, ALBERT J. JR.
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address 791 CINDY BLAIR WAY
Operator City
Operator State
Operator Country
Operator Zip code
Operator Code
Owner has at least one certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code ABY
Departure City ALBANY
Departure State GA
Departure Country
Departure Time 1700
Departure Time Zone EST
Destination Same as Local Flt --
Destination Airport Code LEX
Destination City LEXINGTON
Destination State KY
Destination Country
Specific Phase of Flight Landing
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:36AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length 0
Runway Width 0
Sight Seeing flight No
Air Medical Flight No
Medical Flight --