Aircraft Accident/Incident Report

Draper, Utah 84020
Monday, December 14, 1987 18:58 MST

NTSB Narrative Summary Released at Completion of Accident

DRG A NGT FLT TO REPOSITION THE ACFT TO ITS HOME BASE, THE ENG LOST PWR AS THE PLT WAS CRUISING AT ABOUT 1000' AGL. HE TRANSMITTED A 'MAYDAY' CALL & MANEUVERED THE ACFT TO MAKE A FORCED LNDG ON AN INTERSTATE HIWAY. WHILE APCHG TO LND, THE ACFT STRUCK THE TOP (GROUND) WIRE OF A PWR LINE THAT CROSSED THE HIWAY IN THAT AREA. THE ACFT THEN FLIPPED OVER & FELL ON THE NORTHBOUND LANES OF THE HIWAY. A TEAR DOWN OF THE ENG REVEALED THE ACCESSORY DRIVE GEAR ATTACHING BOLT (PN: STD-847) HAD BACKED OUT, ALLOWING THE DRIVE GEAR TO LOOSEN. THIS RESULTED IN A LOSS OF SYNCHRONIZATION OF VALVE & IGNITION TIMING. AN INCORRECTLY SIZED HELI-COIL, USED TO REPAIR THE GEAR ATTACHING THREADS, WAS FOUND INSTALLED IN THE CRANKSHAFT.

NTSB Probable Cause Narrative

Not Yet Reported

Event Information

Type of Event Accident
Event Date 12/14/1987
Event Day of the Week Monday
Time of Event 1858
Event Time Zone Mountain Standard Time
Event City DRAPER
Event State UTAH
Event Country --
Zipcode of the event site 84020
Event Date Year 1987
Event Date Month 12
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport
Event Location Nearest Airport ID
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles 0
Degrees magnetic from airport 0
Airport Elevation --
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1855 Mountain Standard Time
Direction of event from weather observation facility (degrees) 360
Weather Observation Facility ID SLC
Elevation of weather observation facility 5260
Distance of event from weather observation facility (units?) 15
Time Zone of the weather observation MST
Lighting Conditions Night/Bright
Lowest Ceiling Height 25000
Lowest Non-Ceiling Height 6500
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 30
Air Temperature at event time (in degrees celsius) -4
Dew Point at event time (in degress fahrenheit) -12
Wind Direction (degrees magnetic) 260
Variable Wind Indicator Unknown
Wind Speed (knots) 4
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) 4250
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury Fatal
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal 2
Injury Total Minor --
Injury Total None --
Injury Total Serious --
Injury Total All 2
Investigating Agency NTSB
NTSB Docket Number (internal use) 1981
NTSB Notification Source --
NTSB Notification Date Dec 14 1987 12:00AM
NTSB Notification Time 2030
Fiche Number and/or location -used to find docket information 35410
Date of most recent change to record Dec 13 2000 3:03PM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N2138J
NTSB Number DEN88FA037
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed VFR
Flight plan Was Activated? --
Damage Destroyed
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name PIPER
Aircraft Model PA-28-161
Aircraft Series Identifier PA-28-161
Aircraft Serial Number 287916206
Certified Max Gross Weight 2325
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 Fixed
Aircraft, Type of Last Inspection Continuous Airworthiness
Date of Last Inspection Oct 23 1987 12:00AM
Airframe hours since last inspection 78
Airframe Hours 3393
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name DENNIS & BEVERLY BRADSHAW
Aircraft Owner Street Address 1139 EAST 5690 SOUTH
Aircraft Owner City SALT LAKE CITY
Aircraft Owner State UT
Aircraft Owner Country
Aircraft Owner Zipcode 84121
Operator is an individual? --
Operator Name ALPINE AVIATION
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address P.O. BOX 691
Operator City PROVO
Operator State UT
Operator Country
Operator Zip code 84601
Operator Code TIMA
Owner has at least one certificate Yes - certificate holder
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) Positioning
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code SLC
Departure City SALT LAKE CITY
Departure State UT
Departure Country
Departure Time 1830
Departure Time Zone MST
Destination Same as Local Flt --
Destination Airport Code PUV
Destination City PROVO
Destination State UT
Destination Country
Specific Phase of Flight Approach
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 --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --