General Lyman Field Airport
Aircraft Accident/Incident Report

Keaau, Hawaii 96749
Saturday, April 26, 1986 16:19 HST

NTSB Narrative Summary Released at Completion of Accident

A HILLER 1100 WAS DESTROYED BY FIRE AFTER A FORCED LANDING. THE PLT INDICATED THAT THE EGT HAD RISEN TO APPROXIMATELY 800 DEG C FROM 700 DEG AND THEN ROSE TO 1100 DEG. THE HEAT WARNING LIGHT ILLUMINATED. THE PLT INITIATED A PRECAUTIONARY LANDING. THE ENG FAILED IN THE DESCENT AND A AUTOROTATIVE LANDING WAS ACCOMPLISHED WITHOUT INCIDENT. THE ACFT WAS DESTROYED WHEN THE FIRE COULD NOT BE EXTINGUISHED. DURING THE ENG TEARDOWN, IT WAS OBSERVED THAT THE 1ST STAGE TURBINE WHEEL HAD EXTENSIVE BLADE TIP DAMAGE DUE TO EXCESSIVE TEMP. IT WAS NOTED ROTATING WHEELS AND STATIONARY NOZZLES WERE BADLY DAMAGED BY EITHER HEAT OR FOREIGN OBJECT DAMAGE (FOD) OR BOTH EXCEPT FOR THE #1 NOZZLE WHICH WAS IN GOOD CONDITION. THE VARIOUS COMPONENTS APPEARED TO HAVE BEEN ASSEMBLED PROPERLY EXCEPT FOR THE #6 ENG BEARING SEAL, WHICH WAS MISSING. IT COULD NOT BE DETERMINED IF THE ROPE TYPE SEAL WAS BURNT AWAY WITH THE EXCESSIVE TEMP OR IF IT WAS LEFT OUT OF THE ASSY.

NTSB Probable Cause Narrative

Not Yet Reported

Event Information

Type of Event Accident
Event Date 4/26/1986
Event Day of the Week Saturday
Time of Event 1619
Event Time Zone Hawaii Standard Time
Event City KEAAU
Event State HAWAII
Event Country --
Zipcode of the event site 96749
Event Date Year 1986
Event Date Month 4
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport GENERAL LYMAN FIELD
Event Location Nearest Airport ID ITO
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles 8
Degrees magnetic from airport 175
Airport Elevation --
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1756 Hawaii Standard Time
Direction of event from weather observation facility (degrees) 175
Weather Observation Facility ID ITO
Elevation of weather observation facility 38
Distance of event from weather observation facility (units?) 7
Time Zone of the weather observation HST
Lighting Conditions Day
Lowest Ceiling Height 4500
Lowest Non-Ceiling Height 2000
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Broken
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 15
Air Temperature at event time (in degrees celsius) 27
Dew Point at event time (in degress fahrenheit) 17
Wind Direction (degrees magnetic) 90
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) 30
Density Altitude (feet) --
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 NTSB
NTSB Docket Number (internal use) 708
NTSB Notification Source --
NTSB Notification Date Apr 26 1986 12:00AM
NTSB Notification Time 1910
Fiche Number and/or location -used to find docket information 31044
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 N5067F
NTSB Number LAX86LA193
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed Company VFR
Flight plan Was Activated? --
Damage Destroyed
Aircraft Fire Ground and In-flight
Aircraft Explosion None
Aircraft Manufacturer's Full Name FAIRCHILD HILLER
Aircraft Model FH-1100
Aircraft Series Identifier FH-1100
Aircraft Serial Number 207
Certified Max Gross Weight 2750
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 5
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection 100 Hour
Date of Last Inspection Mar 26 1986 12:00AM
Airframe hours since last inspection 2
Airframe Hours 5004
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name GENERAL LYMAN FIELD
Aircraft Owner Street Address GATE 22, BRIGG ROAD
Aircraft Owner City HILO
Aircraft Owner State HI
Aircraft Owner Country
Aircraft Owner Zipcode 96721
Operator is an individual? --
Operator Name HILO BAY AIR, INC.
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address 6400 AIRPARK
Operator City ANCHORAGE
Operator State AK
Operator Country
Operator Zip code 99502
Operator Code
Owner has at least one certificate Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation External Load
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 ITO
Departure City HILO
Departure State HI
Departure Country
Departure Time 1610
Departure Time Zone HST
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 10:36AM
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 --