# Accident 20210712004369A: Wsk Pzl Mielec M-18A, Seiling, OK, July 12, 2021

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 12, 2021, 09:40 local time
- Place: Seiling, OK
- Damage: Destroyed
- Phase of flight: Unknown
- Operating rules: Agricultural (Part 137)
- Operator: TDVG
- Location: 36.1367° N, 98.8194° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=36.1367&lon=-98.8194&mi=10
- Aircraft: N9310R, a cancelled registration (https://openairdocs.org/deregistered/N9310R-2023-02-04) (OpenAirDocs)
- Registry model: WSK PZL Mielec M-18A (registry code 9810103, https://openairdocs.org/model/wsk-pzl-mielec-m-18a) (OpenAirDocs)
- Registry engine: Wsk-Pzl-K PZL ASZ-62IR (registry code 67203, https://openairdocs.org/engine/wsk-pzl-k-pzl-asz-62ir) (OpenAirDocs)
- Reported make and model: WSK PZL MIELEC M-18A
- People aboard: 1
- Fatal injuries: 1
- Other injuries: 0
- Pilot certificates: Commercial pilot
- Pilot flight hours: 11,362 total
- NTSB investigation: [NTSB CEN21FA314](https://openairdocs.org/ntsb/CEN21FA314) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20210712004369A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON JULY 12, 2021 AT 0940 LOCAL, A WSK RZL MIELEC M18A AIRCRAFT WAS DISCOVERED CRASHED IN A FIELD IN SEILING, OK. THE SUBJECT AIRCRAFT WAS PERFORMING AERIAL AGRICULTURAL OPERATIONS PER TITLE 14 CFR PART 137 IN A FIELD SOUTH OF THE CRASH SITE.

THE CRASH SITE WAS LOCALIZED WITH THE EXCEPTION OF A SMALL DEBRIS FIELD DISCOVERED ALONG THE FLIGHT PATH COMPRISED OF AN AIRCRAFT OPERATING CHECKLIST AS WELL AS WINDSCREEN PLEXIGLASS FRAGMENTS AND PARTS OF THE AIRCRAFT MAIN WING TO INCLUDE INSPECTION COVERS SOUTH EAST OF THE FINAL AIRCRAFT LOCATION.

ADDITIONALLY, THE LEFT MAIN WING WAS DISCOVERED TO THE RIGHT AND AFT OF THE AIRCRAFT MAIN CRASH LOCATION WITH SEPARATE GROUND SCARRING WHICH APPEARS TO INDICATE A POTENTIAL INFLIGHT BREAKUP OF THE LEFT WING PRIOR TO THE AIRCRAFT CRASH.

PRELIMINARY INSPECTION OF THE LEFT WING APPEARS TO SHOWS METAL FATIGUE BEACHING MARKS ON THE FORWARD CENTER WING TO LEFT OUTBOARD WING ATTACHMENT FITTING WHICH IS LIKELY A CONTRIBUTING FACTOR TO THIS EVENT. A REVIEW OF THE AIRCRAFT MAINTENANCE RECORDS INDICATED AN AIRWORTHINESS DIRECTIVE (AD) FOR THE INSPECTION OF THE WING ATTACHMENT FITTINGS AND LUGS HAD BEEN PERFORMED AS REQUIRED BY THE PILOT WHO WAS ALSO A CERTIFIED MECHANIC.

THE ABOVE IS CURRENTLY UNDER INVESTIGATION BY THE NTSB, TO INCLUDE A METALLURGY EXAMINATION OF THE AFOREMENTIONED ATTACHMENT FITTINGS AND LUGS WITH RESULTS PENDING.

## The NTSB's investigation of this event (1)

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.

- [NTSB CEN21FA314](https://openairdocs.org/ntsb/CEN21FA314), Jul 12, 2021: PZL Mielec M18 (N9310R), Seiling, OK, destroyed, 1 fatal. Probable cause: The pilot’s in-flight loss of control due to the structural failure of a wing fitting and separation of the outboard wing section. Also causal were the inadequate wing fitting inspections, which…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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