Aircraft Accident/Incident Report

Stockbridge, Michigan 49285
Monday, July 11, 1988 10:10 EDT

NTSB Narrative Summary Released at Completion of Accident

THE PLT WAS SPRAYING AN ONION FIELD WHEN HE NOTED A VIBRATION, FOLLOWED BY A LOUD NOISE & SEVERE SHAKING OF THE HELICOPTER. HE ATTEMPTED A FORCED LANDING, BUT THE HELICOPTER WAS UNRESPONSIVE TO CYCLIC & COLLECTIVE INPUTS. SUBSEQUENTLY, THE RIGHT SKID DUG INTO THE GROUND & COLLAPSED DURING TOUCHDOWN, THEN THE MAIN ROTOR BLADES STRUCK THE GROUND. A POST ACDNT INSPN REVEALED THE BOLT, WHICH CONNECTED THE DRIVE LINK TO THE COLLECTIVE SCISSORS ARM, WAS MISSING.

NTSB Probable Cause Narrative

Not Yet Reported

Event Information

Type of Event Accident
Event Date 7/11/1988
Event Day of the Week Monday
Time of Event 1010
Event Time Zone Eastern Daylight Time
Event City STOCKBRIDGE
Event State MICHIGAN
Event Country --
Zipcode of the event site 49285
Event Date Year 1988
Event Date Month 7
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 Unknown
Time of the weather observation 0
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID
Elevation of weather observation facility 0
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 5
Air Temperature at event time (in degrees celsius) 26
Dew Point at event time (in degress fahrenheit) 19
Wind Direction (degrees magnetic) 230
Variable Wind Indicator Unknown
Wind Speed (knots) 9
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) 0
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 1
Injury Total Serious --
Injury Total All --
Investigating Agency FAA
NTSB Docket Number (internal use) 2531
NTSB Notification Source --
NTSB Notification Date Jul 11 1988 12:00AM
NTSB Notification Time 1230
Fiche Number and/or location -used to find docket information 42551
Date of most recent change to record Dec 18 2002 11:28AM
User who most recently changed record NTSB\GIUV
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N12087
NTSB Number CHI88DEC05
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 137: Agricultural
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name BELL
Aircraft Model 47D1 (OH-13E)
Aircraft Series Identifier 47D1 (OH-1
Aircraft Serial Number 734
Certified Max Gross Weight 2350
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 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Apr 21 1988 12:00AM
Airframe hours since last inspection 113
Airframe Hours 7951
ELT Installed No
ELT Activated No
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name ALLIED HELICOPTER SERVICES INC
Aircraft Owner Street Address P.O. BOX 6216
Aircraft Owner City TULSA
Aircraft Owner State OK
Aircraft Owner Country
Aircraft Owner Zipcode 74148
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 Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Agriculture
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not Unknown
Indicates Domestic or International Flight Unknown
Operator carrying Pax/Cargo/Mail Unknown
Type of Flying (Per_Bus / Primary) Aerial Application
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code
Departure City
Departure State
Departure Country
Departure Time 800
Departure Time Zone EDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code
Destination City
Destination State
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 --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --