19950901027639A

Accident · Substantial damage

FAA accident report · Hiller UH-12E · Dos Palos, CA · September 1, 1995

Date: September 1, 1995 · 08:30 local
Place: Dos Palos, CA
Phase of flight: Pwr Off Vert Land/Autorotate
Operating rules: Agricultural (Part 137)
Damage: Substantial damage
Aircraft: N4027D
NTSB investigation: NTSBLAX95LA318
Reported as: Hiller UH12E
Reported engine: Lycoming VO540C2A
People aboard: 1
Fatal injuries: 0
Pilot’s flight hours: 8,500 total3,003 in this make and model300 in the last 90 days

N4027DRegistered now · Hiller UH-12ES/N 5072 Airframe modelHiller UH-12E

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

During spray run vibration severe yaw and spin. Impacted hard. Had lost a tail rotor blade. Tt bar fatigue failure.

As the FAA filed it

DURING SPRAY RUN VIBRATION SEVERE YAW AND SPIN. IMPACTED HARD. HAD LOST A TAIL ROTOR BLADE. TT BAR FATIGUE FAILURE.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB LAX95LA318Accident · No injuriesLimited investigationFinal reportDos Palos, CAthe fatigue failure of the tail rotor tension torsion bar plates.Sep 1, 1995 · Substantial damage

Other reports on N4027D · 3

Matched to the same aircraft by N-number and date.

Accident 19830107000309ATo Vertical (Helicopter Only) · Vacaville, CARotor blades struck a powerline when helicopter lifted from a levee. Pilot landed ok but slid off into a ditch.Jan 7, 1983 · Substantial damage Incident 19810403024639IPwr Off Run Land (Autorotation · Huron, CAMain rotor blade skin separated and demolished tail rotor and transmission. Pilot landed ok.Apr 3, 1981 · Minor damage Accident 19790427007179ALow Level Operations · Gustine, CAPilot hit a wire while spraying agricultural chemicals.Apr 27, 1979 · Substantial damage