CEN23LA398

NTSB accident investigation · Van's RV-12 · Crystal, MN · September 4, 2023

Accident · Minor injuriesClass 3 · LimitedFinal report
Date
September 3, 2023, 19:00 local (Sep 4, 2023, 00:00 UTC)
Place
Crystal, MN · Runway 24R at MIC
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N321BTVan's RV-12
Defining event
Landing-flare/touchdown: Abnormal runway contact
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
Rotax Aircraft Engines, FAA Minneapolis FSDO, Van's Aircraft, Federal Safety Investigation Authority
FAA report
20230903015969A
Case key
193009

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 landing flare, which resulted in a bounced landing and an overstress fracture of the nose landing gear strut.

Findings · 5

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotVans RV-12IS: 4 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: landing flareAircraft › Aircraft oper/perf/capability · Not attained/maintainedVans RV-12IS: 2 casesAll aircraft: 1,285 casesProbable cause
Landing gear system: nose/tail landing gearAircraft › Aircraft systems · Capability exceededVans RV-12IS: 1 caseAll aircraft: 185 casesProbable cause
Action: incorrect action performancePersonnel issues › Action/decision · PilotVans RV-12IS: 2 casesAll aircraft: 1,386 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 was landing the light-sport airplane on the runway when it bounced two times. The nose gear collapsed, the propeller struck the ground, and the airplane came to rest upright on the runway in a nose-down attitude. The two occupants were able to exit the airplane without further incident. The airplane sustained substantial damage to the lower fuselage. A postaccident metallurgical examination of the fractured nose landing gear strut revealed features consistent with ductile overstress fracture. There was no evidence of any pre-existing damage to the nose landing gear strut. It is likely the pilot did not attain a proper landing flare, which resulted in the airplane bouncing twice and subsequently sustaining an overstress fracture of the nose landing strut.

Factual narrative

On September 3, 2023, about 1900 central daylight time, a Van’s Aircraft RV-12iS airplane, N321BT, sustained substantial damage when it was involved in an accident near Crystal, Minnesota. The pilot sustained minor injuries and the passenger sustained no injury. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The light-sport airplane departed from the Major Gilbert Field Airport (4R5), La Pointe, Wisconsin, about 1725, for the cross-country flight. The intended destination was the Crystal Airport (MIC), Minneapolis, Minnesota. During the landing at MIC, the airplane touched down on runway 24R, which was a dry asphalt runway, and bounced two times. The nose gear collapsed, the propeller struck the ground, and the airplane came to rest upright on the runway in a nose-down attitude. The two occupants were able to exit the airplane without further incident. The airplane sustained substantial damage to the lower fuselage. A postaccident metallurgical examination of the fractured nose landing gear strut revealed features consistent with ductile overstress fracture. There was no evidence of any pre-existing damage to the nose landing gear strut. The Federal Aviation Administration has published the Airplane Flying Handbook (FAA-H-8083-3C), which discusses bounced landings and states in part: Since a bounce occurs when the airplane makes contact with the ground before the proper touchdown attitude is attained, it is almost invariably accompanied by the application of excessive back-elevator pressure. This is usually the result of the pilot realizing too late that the airplane is not in the proper attitude and attempting to establish it just as the second touchdown occurs.

Aircraft

Registration
N321BT
Reported as
Van's RV-12 (iS)
Category
Airplane
Serial number
12110
Built
2022
Airframe hours
206.6
Engine
Rotax Aircraft Engines 912iS, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Light Sport Aviation Services LLC
Airworthiness certificate
Special, Experimental light sport (Special)
Last inspection
Annual · April 18, 2023 · 77.2 hours before
Departed
4R5 · La Pointe, WI
Destination
Same as departure
Airport
MIC · Crystal, runway 06L/24R, 2,500 × 75 ft, asphalt
Equipment
Angle of attack indicator, Electronic primary flight display, Onboard weather, Stall warning system, ADS-B, Electronic multifunction display, Electronic flight bag or handheld device, Data recorder, Auto-pilot

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
46
Injuries
Minor
Certificate
Sport Pilot
Medical
Sport pilot
Last flight review
July 21, 2023
Seat
Left
Restraint
5-point
Flight hours
193 total · 193 in this make and model · 114 as pilot in command · 55 in the last 90 days · 14 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
91 °F, dew point 66 °F
Altimeter
29.71 inHg
Observed at
KMIC
METAR
KMIC 040006Z 18006KT 10SM CLR 33/19 A2971 RMK AO2 T03330194

Docket · 5

The files NTSB released with the investigation on May 9, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 15.4 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.