Aircraft Accident/Incident Report

Seattle, Washington 98133
Sunday, September 27, 1987 10:30 PDT

NTSB Narrative Summary Released at Completion of Accident

THE PLT RPRTD THAT WHILE HE WAS IN CRUISE FLIGHT AT ABOUT 1000', THE ENG LOST POWER. HE INITIATED AN AUTOROTATION TO AN ATHLETIC FIELD IN A CITY PARK. DRG HIS APCH, HE CHANGED HIS PLANNED TOUCHDOWN POINT SVRL TIMES DUE TO PERSONNEL ON THE FIELD. HE SAID THAT THIS RESULTED IN A LOSS OF AIRSPEED, & SUBSEQUENTLY, THE HELICOPTER LANDED HARD. DRG TOUCHDOWN, THE MAIN ROTOR BLADES FLEXED DOWNWARD & SEVERED THE TAIL BOOM. AN EXAM OF THE ENG REVEALED NO EVIDENCE OF A MECHANICAL MALFUNCTION THAT WOULD HAVE RESULTED IN A LOSS OF POWER.

NTSB Probable Cause Narrative

Not Yet Reported

Event Information

Type of Event Accident
Event Date 9/27/1987
Event Day of the Week Sunday
Time of Event 1030
Event Time Zone Pacific Daylight Time
Event City SEATTLE
Event State WASHINGTON
Event Country --
Zipcode of the event site 98133
Event Date Year 1987
Event Date Month 9
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 0
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1045 Pacific Daylight Time
Direction of event from weather observation facility (degrees) 150
Weather Observation Facility ID BFI
Elevation of weather observation facility 17
Distance of event from weather observation facility (units?) 8
Time Zone of the weather observation PDT
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 25000
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling None
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) 14
Dew Point at event time (in degress fahrenheit) 9
Wind Direction (degrees magnetic) 20
Variable Wind Indicator Unknown
Wind Speed (knots) 7
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) 259
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury Minor
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor 1
Injury Total None 3
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 1688
NTSB Notification Source --
NTSB Notification Date Sep 27 1987 12:00AM
NTSB Notification Time 1100
Fiche Number and/or location -used to find docket information 35026
Date of most recent change to record Dec 13 2000 2:50PM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N8613F
NTSB Number SEA87FA194
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 HUGHES
Aircraft Model 369D
Aircraft Series Identifier 369D
Aircraft Serial Number 670127D
Certified Max Gross Weight 3000
Aircraft Category Helicopter
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 100 Hour
Date of Last Inspection Feb 16 1987 12:00AM
Airframe hours since last inspection 64
Airframe Hours 3129
ELT Installed No
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name RAYMOND D. TENNEY
Aircraft Owner Street Address 20304 43RD SE
Aircraft Owner City BOTHELL
Aircraft Owner State WA
Aircraft Owner Country
Aircraft Owner Zipcode 98012
Operator is an individual? --
Operator Name
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address
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 SHN
Departure City SHELDON
Departure State WA
Departure Country
Departure Time 1000
Departure Time Zone PDT
Destination Same as Local Flt --
Destination Airport Code PAE
Destination City EVERETT
Destination State WA
Destination Country
Specific Phase of Flight Landing
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:35AM
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 --