CEN22LA400

NTSB accident investigation · Robinson Helicopter R44 II · San Isidro, TX · August 21, 2022

Accident · Serious injuriesClass 4 · LimitedFinal report
Date
August 20, 2022, 19:30 local (Aug 21, 2022, 00:30 UTC)
Place
San Isidro, TX
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Emergency descent
Aircraft
N4447ARobinson Helicopter R44 II
Defining event
Autorotation: Hard landing
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Central Region
Parties
FAA
FAA report
20220820014859A
Case key
105816

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

The pilot’s improper decision to conduct an autorotation with a tailwind, which resulted in a hard landing and substantial damage.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeRobinson Helicopter R44 II: 13 casesAll aircraft: 594 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that he was practicing autorotations when the accident occurred. After successfully completing several autorotations from the same direction, he elected to attempt one from a different direction, which put the helicopter into a tailwind. During the maneuver, when the pilot rolled off the throttle, the helicopter “lost RPM”. He attempted to add power but was too low to the ground and the helicopter landed hard and rolled onto its side. The helicopter sustained substantial damage to the fuselage and the pilot was seriously injured. The pilot reported that there were no preaccident mechanical malfunctions with the helicopter that would have precluded normal operation.

Aircraft

Registration
N4447A
Reported as
Robinson Helicopter R44 II
Category
Helicopter
Serial number
12906
Built
2009
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Destination
Same as departure

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
33
Injuries
Serious
Certificate
Commercial
Medical
Class 2, Without waivers/limitations
Seat
Rear
Flight hours
1,000 total

Weather

Conditions
Visual (VMC) · Day
Wind
100° at 15 knots, gusting 21
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 73 °F
Altimeter
29.87 inHg
Observed at
KMFE
METAR
KMFE 202353Z 10015G21KT 10SM CLR 32/23 A2987 RMK AO2 SLP113 60000 T03220228 10356 20317 56006

Docket · 2

The files NTSB released with the investigation on September 15, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 402 KB in all.

FAA reports on this event · 1

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