# Accident 19900926042439A: Ayres S2RT34RESTD, Thorton, MS, September 26, 1990

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: September 26, 1990, 09:14 local time
- Place: Thorton, MS
- Damage: Destroyed
- Phase of flight: Low Level Operations
- Operating rules: Agricultural (Part 137)
- Operator: KYXG
- Aircraft: N4017B, a cancelled registration (https://openairdocs.org/deregistered/N4017B-1997-10-09) (OpenAirDocs)
- Registry model: Ayres S2R-T34 (registry code 0970106, https://openairdocs.org/model/ayres-s2r-t34) (OpenAirDocs)
- Reported make and model: AYRES S2RT34RESTD
- Reported engine: PWA PT6A34AG
- People aboard: 1
- Fatal injuries: 1
- Pilot flight hours: 27,500 total, 3,200 in this make and model
- NTSB investigation: [NTSB MIA90FA190](https://openairdocs.org/ntsb/MIA90FA190) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19900926042439A

## Narrative

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

RIGHT WING FAILED IN FLIGHT FROM FATIGUE CRACKS AROUND A DRILL HOLE IN WING SPAR CAP. PATCH HID FATIGUE CRACKS.

## 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 MIA90FA190](https://openairdocs.org/ntsb/MIA90FA190), Sep 26, 1990: Ayres S2R-T34 (N4017B), Thornton, MS, destroyed, 1 fatal. Probable cause: THE IMPROPER DRILLING OF A HOLE IN THE SPAR CAP BY A MECHANIC RESULTING IN THE INITIATION OF FATIGUE CRACKING IN THE SPAR CAP AND SUBSEQUENT FAILURE OF THE SPAR CAP AND INFLIGHT SEPARATION OF THE…

## Other reports on N4017B (1)

Matched to the same aircraft by N-number and date.

- [Accident 19800614027739A](https://openairdocs.org/incident/19800614027739A), Jun 14, 1980: Ayres S2R (N4017B), Seminole, TX, Substantial damage. Engine quit en route to spray field. Hit ditch, landing on a road. Found power turbine damaged by excessive heat.

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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