- Date
- July 23, 1987, 06:45 local (11:45 UTC)
- Place
- Ulysess, KS
- Injuries
- 1 minor
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N67139Hiller 12E
- Weather
- Visual (VMC) · Day
- Status
- Completed · report November 8, 1988
- Report
- Approved by Office Director
- FAA report
- 19870723038669A
- Case key
- 34418
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
During a helicopter aerial application operation, acft suffered a main rotor system hub failure. PIC was unable to control the acft and an uncontrolled descent resulted. Acft struck the terrain and was substantially damaged and the PIC suffered minor injuries. PIC stated that the complete rotor head, blades and paddles, had just been reinstalled, and after a flight of less than one mile, the failure occurred. PIC further stated that the linkage pin that goes through the mast and pitch change mechanism was not aligned causing the failure.
Aircraft
- Registration
- N67139
- Reported as
- Hiller 12E
- Category
- Helicopter
- Serial number
- 1623
- Airframe hours
- 1,845
- Engine
- Lycoming O-540, 305 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Aerial application · Part 137
- Operator
- Tri Rotor Spray
- Registered owner
- Tri-Rotor Spray
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- 100 hour · June 2, 1987 · 83 hours before
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 34
- Certificate
- Commercial
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Center
- Flight hours
- 1,520 total
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 200° at 13 knots
- Visibility
- 20 statute miles
- Lowest ceiling
- None
- Temperature
- 70 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.