# NTSB ERA24LA009: Monocoupe 90AL-115, N87621, Myakka City, FL, October 14, 2023

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Class 4 · Limited · Final report
- Date: October 14, 2023, 11:00 local (15:00 UTC)
- Place: Myakka City, FL
- Coordinates: 27.347915, -82.161585 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=27.3479&lon=-82.1616&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Defining event: [Takeoff: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470)
- Highest injury: Minor injuries
- Injuries: 1 minor
- 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
- NTSB case key (mKey): 193248
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA24LA009
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/193248/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=193248
- Page: https://openairdocs.org/ntsb/ERA24LA009

## Probable cause

The pilot’s failure to maintain adequate clearance from a fence during takeoff.

## 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: [Monocoupe 90AL-115, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=5810110), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Object/animal/substance: fence/fence post](https://openairdocs.org/ntsb-findings/03022047): Environmental issues › Physical environment · Response/compensation (probable cause); cases with it: [Monocoupe 90AL-115, 1 case](https://openairdocs.org/ntsb-findings/03022047/cases.md?model=5810110), [All aircraft, 313 cases](https://openairdocs.org/ntsb-findings/03022047/cases.md)

## Sequence of events

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

- [Takeoff: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470) (defining event); cases with it: [Monocoupe 90AL-115, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=5810110), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md)

## Analysis

The pilot stated that he had erected barbed wire fences on both sides of his private airstrip to keep cows off the runway. During takeoff, he veered left and struck the fence. The airplane nosed over, resulting in substantial damage to the wings and empennage. The pilot reported that there were no preimpact mechanical malfunctions of the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N87621](https://openairdocs.org/aircraft/N87621), registered now, S/N 869, built 1949 (OpenAirDocs)
- Reported make and model: MONOCOUPE 90AL-115
- Registry model: [Monocoupe 90AL-115](https://openairdocs.org/model/monocoupe-90al-115) (registry code 5810110) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 869
- Year built: 1949
- Airframe hours: 837
- Engines: Lycoming O-320-A3A 150 hp reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Standard, Normal
- Airport: PVT, Pvt, runway 15, 3,400 × 80 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 70; injuries: minor; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review December 5, 2021; seat: left; restraint: 4-point; flight hours: 2,150 total, 75 in this make and model, 10 in the last 90 days, 10 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 8 knots, gusting 19
- Visibility: 10 statute miles
- Temperature: 82 °F, dew point 72 °F
- Altimeter: 29.89 inHg
- Observed at: SRQ, 21 nm away
- METAR: METAR KSRQ 141453Z 32008G19KT 10SM SCT023 28/22 A2989 RMK AO2 SLP121 T02780217 52004

## 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 20231014016509A](https://openairdocs.org/incident/20231014016509A), Oct 14, 2023: Monocoupe 90AL-115, Myakka City, FL, Substantial damage. PIC started takeoff from unimproved grass field. Brought the aircraft up to takeoff speed. Lifted off runway, aircraft immediately began a left drift from…

## Docket (3 files)

The files NTSB released with the investigation on November 16, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=193248. 5.1 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 3.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16250469&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf
- Memorandum for record a�� telephone interview, pilot (item 2, PDF, 1 page, 98 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16242776&FileExtension=pdf&FileName=MOR-pilot%20statement_Redacted-Rel.pdf
- Investigative photos (item 3, PDF, 3 pages, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16242567&FileExtension=pdf&FileName=Investigative%20Photo%27s-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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