# NTSB FTW85LA307: Rockwell S-2R, N5025X, Olton, TX, August 6, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 6, 1985, 10:10 local (15:10 UTC)
- Place: Olton, TX
- Coordinates: 34.170783, -102.129737 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.1708&lon=-102.1297&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21815
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW85LA307
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21815/pdf
- Page: https://openairdocs.org/ntsb/FTW85LA307

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of control - on ground/water, landing - roll
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - not corrected, pilot in command (cause)
  - airport facilities,runway/landing area condition - soft (contributing factor)
  - complacency, pilot in command (cause)
- Main gear collapsed, landing - roll
  - landing gear,main gear - overload (contributing factor)
  - design stress limits of aircraft - exceeded, pilot in command (cause)

## Analysis

THE PILOT STATED THAT WHEN HE TOUCHED DOWN ON THE DIRT LANDING STRIP THE AIRCRAFT IMMEDIATELY TURNED RIGHT AND NO AMOUNT OF CORRECTIVE ACTION HELPED. HE FURTHER STATED THE MECHANIC HAD TO REMOVE THE BRAKE PADS TO GET THE TIRE TO ROLL. THE AIRCRAFT'S OWNER STATED EXAMINATION REVEALED THE RIGHT WHEEL HAD MORE RESISTANCE TO ROTATION THAN DID THE OTHER WHEEL BUT THAT IT COULD STILL BE ROTATED BY HAND. HE STATED HE SUSPECTED THE PIOT GOT THE WHEEL IN THE SAND AND JUST GROUND LOOPED THE AIRCRAFT. HE FURTHER STATED THE RESISTANCE TO ROTATION OF THE WHEEL WAS POSSIBLY DUE TO SAND AND GRIT IN THE WHEEL AND BRAKE ASSEMBLY.

## Aircraft

- Registration: [N5025X](https://openairdocs.org/deregistered/N5025X-1993-11-18), registration cancelled 1993-11-18, S/N 5057R (OpenAirDocs)
- Reported make and model: Rockwell S-2R
- Registry model: [Rockwell International S-2R](https://openairdocs.org/model/rockwell-international-s-2r) (registry code 7630202) (OpenAirDocs)
- Category: Airplane
- Serial number: 5057R
- Airframe hours: 2223
- Engines: WRIGHT C7BA SERIES 800 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Tidwell Spraying Service
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, May 1, 1985
- Departed: OLTON, TX
- Airport: Hill Ag Strip

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 2,142 total, 598 in this make and model, 148 in the last 90 days, 9 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 5 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 97 °F

## 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 19850806036869A](https://openairdocs.org/incident/19850806036869A), Aug 6, 1985: Ayres S2*, Olton, TX, Substantial damage. Pilot states that right brake locked during landing roll. Aircraft veered right and sheared off left landing gear.

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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