# NTSB WPR21LA187: Remos Acft Gmbh Flugzeugbau Remos GX, N104GX, Sacramento, CA, May 9, 2021

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: May 9, 2021, 14:20 local (21:20 UTC)
- Place: Sacramento, CA
- Coordinates: 38.555311, -121.29721
- Nearby events: https://openairdocs.org/map.md?lat=38.5553&lon=-121.2972&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining event: [Landing: 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: Western Pacific Region
- NTSB case key (mKey): 103054
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR21LA187
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/103054/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=103054
- Page: https://openairdocs.org/ntsb/WPR21LA187

## Probable cause

The pilot’s failure to maintain directional control during landing in gusty wind conditions which resulted in a runway excursion and collision with terrain.

## Findings

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

- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Remos Acft Gmbh Flugzeugbau REMOS GX, 7 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=060006H), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Remos Acft Gmbh Flugzeugbau REMOS GX, 2 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=060006H), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md)
- [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Remos Acft Gmbh Flugzeugbau REMOS GX, 1 case](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=060006H), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md)

## Sequence of events

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

- [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Remos Acft Gmbh Flugzeugbau REMOS GX, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=060006H), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)

## Analysis

The student pilot reported that, he configured the airplane for landing on runway 22R and touched down on the runway centerline. Upon landing, the airplane encountered a wind gust and became airborne. The airplane drifted off the runway area and the wings oscillated with the tips making contact with the surface. As a result of the impact, the airplane sustained substantial damage to the upper fuselage skin located between the wing roots. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. An aviation routine weather report (METAR) for the airport about 25 minutes after the accident reported winds from 310o at 10 knots with gusts to 17 knots.

## Aircraft

- Registration: [N104GX](https://openairdocs.org/aircraft/N104GX), registered now, S/N 288, built 2008 (OpenAirDocs)
- Reported make and model: REMOS ACFT GMBH FLUGZEUGBAU REMOS GX
- Registry model: [Remos Acft Gmbh Flugzeugbau REMOS GX](https://openairdocs.org/model/remos-acft-gmbh-flugzeugbau-remos-gx) (registry code 060006H) (OpenAirDocs)
- Registry engine: [Rotax 912ULS series](https://openairdocs.org/engine/rotax-912uls-series) (registry code 55572, 4 cycle) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 288
- Year built: 2008
- Airframe hours: 800
- Engines: Rotax 912 80 hp reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Standard, Normal
- Departed: RHV, San Jose, CA
- Destination: Same as departure
- Airport: MHR, Sacramento Mather, runway 04L/22R, 6,081 × 150 ft, asphalt
- Equipment: Electronic primary flight display, Angle of attack indicator, Airframe parachute

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; injuries: none; student; medical: class 3, without waivers/limitations; seat: left; flight hours: 45 total, 44 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 310° at 10 knots, gusting 17
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 34 °F
- Altimeter: 29.84 inHg
- Observed at: KMHR, 1 nm away
- METAR: KMHR 092145Z 31010G17KT 10SM SKC 29/01 A2984 RMK AIRCRAFT INCIDENT

## 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 20210509008259A](https://openairdocs.org/incident/20210509008259A), May 9, 2021: Remos Acft Gmbh Flugzeugbau REMOS GX, Mather, CA, Substantial damage. Evidence of the wreckage from N104GX indicates that the aircraft attempted to land on runway 22 right at the Mather Airport. Damage and the pilot's statement…

## Docket (2 files)

The files NTSB released with the investigation on August 20, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=103054. 614 KB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 399 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12551850&FileExtension=pdf&FileName=WPR21LA187%206120%20master_Redacted%20(1)-Rel.pdf
- Photographs (source unknown) (item 2, PDF, 1 page, 215 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12597100&FileExtension=pdf&FileName=Z-%20Attachment%2002%20-Photos-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.

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