CHI91LA113

NTSB accident investigation · Robinson R-22 · Augusta, KS · March 24, 1991

Accident · No injuriesLimited investigationFinal report
Date
March 24, 1991, 14:34 local (20:34 UTC)
Place
Augusta, KS
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N2503ARobinson R-22
Weather
Visual (VMC) · Day
Status
Completed · report January 25, 1993
Report
Approved by Office Director
FAA report
19910324007259A
Case key
15027

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

An improper autorotation was performed by the dual student and remedial action was delayed by the CFI. Factors related to the accident were: inadequate airspeed and rotor RPM.

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.

Hard landingLanding
Autorotation - improperDual studentCause
Airspeed - inadequateDual studentFactor
Rotor rpm - inadequateDual studentFactor
Remedial action - delayedPilot in command(cfi)Cause

Analysis

The instructor plt said that while teaching and practicing straight ahead autorotation landing, rotor RPM and airspeed decayed and before corrective action was taken the helicopter landed hard which resulted in the main rotor flexing downward and severing the tail boom.

Aircraft

Registration
N2503A
Reported as
Robinson R-22
Category
Helicopter
Serial number
595
Engine
Lycoming O-320-B2C, 131 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Kansas Copters & Wings Inc.
Airport
3AU · Augusta, runway 18, 1,500 × 0 ft, grass/turf

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
33
Certificates
Flight instructor, Commercial
Medical
Class 2, Valid Medical--w/ waivers/lim
Flight hours
753 total · 635 in this make and model · 681 as pilot in command · 106 in the last 90 days · 38 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 20 knots, gusting 28
Visibility
20 statute miles
Lowest ceiling
25,000 ft broken
Temperature
-0 °F, dew point -0 °F
Observed at
ICT, 20 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.