# NTSB CEN21LA149: Aeropro CZ S R O A220, N135C, Loveland, CO, March 6, 2021

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: March 6, 2021, 09:58 local (16:58 UTC)
- Place: Loveland, CO
- Coordinates: 40.451827, -105.01133 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.4518&lon=-105.0113&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining event: [Landing-flare/touchdown: Loss of control on ground](https://openairdocs.org/ntsb-events/230)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- Investigation class: Class 4 - Basic report with no Prelim publish
- NTSB office: Central Region
- Parties: Federal Aviation Administration; Denver FSDO
- NTSB case key (mKey): 102721
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN21LA149
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/102721/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=102721
- Page: https://openairdocs.org/ntsb/CEN21LA149

## Probable cause

The pilot’s failure to maintain directional control during landing that resulted in a ground loop and impact with terrain.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Aeropro CZ S R O A220, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=06001CI), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md)
- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Aeropro CZ S R O A220, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=06001CI), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Landing-flare/touchdown: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Aeropro CZ S R O A220, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=06001CI), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)
- [Landing-landing roll: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490); cases with it: [Aeropro CZ S R O A220, 1 case](https://openairdocs.org/ntsb-events/490/sequence.md?model=06001CI), [All aircraft, 1,309 cases](https://openairdocs.org/ntsb-events/490/sequence.md)

## Analysis

The private pilot reported that while performing a stop and go landing, the airplane was not aligned with the runway centerline and immediately veered to the left, ground looped, and impacted terrain. The airplane sustained substantial damage to the right wing and flaperon. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N135C](https://openairdocs.org/aircraft/N135C), registered now, S/N 60120 (OpenAirDocs)
- Reported make and model: AEROPRO CZ S R O A220
- Registry model: [Aeropro CZ S R O A220](https://openairdocs.org/model/aeropro-cz-s-r-o-a220) (registry code 06001CI) (OpenAirDocs)
- Category: Airplane
- Serial number: 60120
- Year built: 2020
- Airframe hours: 38.8
- Engines: Rotax 912 ULS 2 100 hp reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Special, Special light-sport (Special)
- Last inspection: Annual, December 31, 2020
- Destination: Same as departure
- Airport: FNL, Northern Colorado Regional Airport, runway 33, 8,500 × 100 ft, asphalt
- Equipment: ADS-B, Electronic flight bag or handheld device, Electronic multifunction display, Electronic primary flight display

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 59; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review June 29, 2019; seat: left; restraint: 4-point; flight hours: 211 total, 36 in this make and model, 182 as pilot in command, 34 in the last 90 days, 5 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 46 °F, dew point 16 °F
- Altimeter: 30.08 inHg
- Observed at: FNL

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 20210306001029A](https://openairdocs.org/incident/20210306001029A), Mar 6, 2021: Aeropro Cz S R O A220, Loveland, CO, Substantial damage. On March 6th 2021 at 1058AM mt N135C, an Aeropro C2, ground looped after touchdown on runway 33 at kfnl. Field conditions at the time were light and variable…

## Docket (4 files)

The files NTSB released with the investigation on July 19, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=102721. 4.9 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 4.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12068919&FileExtension=pdf&FileName=6120%20Master_Redacted-Rel.pdf
- Record of correspondence - NTSB duty officer (item 2, PDF, 1 page, 1 photo, 114 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12065428&FileExtension=pdf&FileName=RECORD%20OF%20CORRESPONDENCE%20-%20NTSB%20Duty%20Officer-Rel.pdf
- Record of correspondence - FAA (item 3, PDF, 1 page, 112 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12067596&FileExtension=pdf&FileName=RECORD%20OF%20CORRESPONDENCE%20%20FAA-Rel.pdf
- Photo log (item 4, PDF, 1 page, 379 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12066756&FileExtension=pdf&FileName=Photo%20Log-Rel.pdf

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.