ERA24LA215

NTSB accident investigation · Hughes 369 · Crestview, FL · May 10, 2024

Accident · No injuriesClass 4 · LimitedFinal report
Date
May 10, 2024, 15:25 local (20:25 UTC)
Place
Crestview, FL · East of the airport near the wind sock
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Emergency descent
Aircraft
N969VSHughes 369
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
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20240510005569A
Case key
194239

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

On this page

Probable cause

The pilot’s improper flare, which resulted in a hard landing and the main rotor blades contacting the tail boom.

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.

Performance/control parameters: landing flareAircraft › Aircraft oper/perf/capability · Not attained/maintainedHughes Helicopters HUGHES 369D: 2 casesAll aircraft: 1,285 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

On the day of the accident, the pilot had been practicing autorotations. The first was a power-on autorotation to the ground, followed by two hovering autorotations, all of which were uneventful. The pilot then briefed and set up for a power off autorotation to the ground. The entry began at 600 ft above ground level (agl) and the glide was normal. He set up a 70-knot glide speed and added collective to keep the rotor at 480 rpm. The helicopter was heavy with fuel and the added pilot-rated passenger, so the decent was faster than anticipated. The pilot reported that at 40 ft agl, he accomplished an “auto-rotative flare attitude” and that the “flare was not aggressive enough for the weight,” and as a result, he held the flare longer than usual. The ground speed bled off, but the leveling of the helicopter was not accomplished in a timely manner. The tail skid contacted the ground hard and the main rotor blades flexed down resulting in contact with the tail boom and the fuselage behind the rotor head. The helicopter’s tailboom and main rotor blades were substantially damaged. The pilot reported that there were no pre-accident mechanic malfunctions or failures with the helicopter that would have precluded normal operation.

Aircraft

Registration
N969VS
Reported as
Hughes 369 (D)
Category
Helicopter
Serial number
1100833D
Built
1980
Airframe hours
17,976.8
Engine
Rolls Royce 250-C20B, 420 horsepower, turbo shaft
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Vertol Systems Co Inc
Registered owner
Vertol Systems Co Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · December 4, 2023 · 14.2 hours before
Destination
Same as departure
Airport
CEW · Bob Sikes
Equipment
Electronic multifunction display, ADS-B

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
61
Injuries
None
Certificates
Airline transport, Flight instructor
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 2, With waivers/limitations
Last flight review
June 20, 2023
Seat
Right
Restraint
4-point
Flight hours
9,719 total · 219 in this make and model · 8,026 as pilot in command · 20 in the last 90 days · 9 in the last 30 days
Role
Pilot-rated passenger
Age
64
Injuries
None
Certificates
Flight instructor, Airline transport
Instrument ratings
Helicopter
Medical
Class 2, With waivers/limitations
Last flight review
January 25, 2023
Seat
Left
Restraint
4-point
Flight hours
10,790 total · 73 in this make and model · 8,628 as pilot in command · 18 in the last 90 days · 5 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
230° at 5 knots
Visibility
10 statute miles
Lowest ceiling
2,400 ft broken
Temperature
81 °F, dew point 72 °F
Altimeter
29.85 inHg
Observed at
CEW
METAR
KCEW 102053Z AUTO 23005KT 10SM SCT019 BKN024 BKN029 27/22 A2985 RMK AO2 SLP105 60000 T02670217 58011

Docket · 3

The files NTSB released with the investigation on June 21, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 6.7 MB 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.