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NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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December 2, 1992 · Hiller UH12B · N1048P

Justin, TX

Overview

Report Status
Probable Cause
Event Type
Accident
Date
December 2, 1992
Injury Outcomes
No injuries (1 uninjured)
Location
Justin, TX
Aircraft
Hiller UH12B
Tail Number
N1048P
Operator
Clark Landis E
Injuries
None
Aircraft Damage
Substantial
NTSB Number
FTW93LA047

THE COMMERCIAL PILOT REPORTED THAT THE HELICOPTER DEVELOPED A SEVERE VERTICAL VIBRATION WHILE ON HIS TURN TO FINAL APPROACH WHILE ON A TEST FLIGHT FOR COMPLETION OF AN ANNUAL INSPECTION. THE PILOT ELECTED TO MAKE AN IMMEDIATE PRECAUTIONARY LANDING TO AN OPEN FIELD SHORT OF HIS INTENDED LANDING POINT. WHILE ON AN EXAGGERATED FLARE TO AVOID IMPACTING LARGE BALES OF HAY, THE TAIL ROTOR STRUCK THE GROUND AND THE MAIN ROTOR BLADES IMPACTED THE TAILBOOM. THE LEFT LANDING GEAR SKID FOLDED PRIOR TO THE HELICOPTER COMING TO A STOP. THE SOURCE OF THE VERTICAL VIBRATION WAS NOT IDENTIFIED.

NTSB Probable Cause

FAILURE OF THE MAIN ROTOR SYSTEM FOR UNDETERMINED REASONS. A FACTOR WAS THE LACK OF SUITABLE TERRAIN AT THE PILOT'S DISPOSAL.

Full Narrative

THE COMMERCIAL PILOT REPORTED THAT THE HELICOPTER DEVELOPED A SEVERE VERTICAL VIBRATION WHILE ON HIS TURN TO FINAL APPROACH WHILE ON A TEST FLIGHT FOR COMPLETION OF AN ANNUAL INSPECTION. THE PILOT ELECTED TO MAKE AN IMMEDIATE PRECAUTIONARY LANDING TO AN OPEN FIELD SHORT OF HIS INTENDED LANDING POINT. WHILE ON AN EXAGGERATED FLARE TO AVOID IMPACTING LARGE BALES OF HAY, THE TAIL ROTOR STRUCK THE GROUND AND THE MAIN ROTOR BLADES IMPACTED THE TAILBOOM. THE LEFT LANDING GEAR SKID FOLDED PRIOR TO THE HELICOPTER COMING TO A STOP. THE SOURCE OF THE VERTICAL VIBRATION WAS NOT IDENTIFIED.

Flight

Event TypeAccident
Event Time17:00 CST
Nearest AirportClark'S Airport (0nm S)
Runway35
Runway Length1800 ft
Runway Width22 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftHiller UH12B
Tail NumberN1048P
Aircraft CategoryHeli
DamageSubstantial
OperatorClark Landis E
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · VO-335-B · Reciprocating · 210
Seats3

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 59 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind40° @ 12 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point52 / 21 C
Altimeter30.00 inHg
Observation Time16:47
Weather SourceWFAC

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Appendix: Source Data