# NTSB SEA87LA103: Ayres S2R, N3693X, Walla Walla, WA, May 29, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 28, 1987, 18:20 local (May 29, 1987, 01:20 UTC)
- Place: Walla Walla, WA
- Coordinates: 46.110157, -118.299621 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.1102&lon=-118.2996&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 27, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 40630
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA87LA103
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40630/pdf
- Page: https://openairdocs.org/ntsb/SEA87LA103

## Sequence of events

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

- Main gear collapsed, takeoff - roll/run
  - landing gear,main gear - failure,partial (cause)
- On ground/water encounter with terrain/water, takeoff - roll/run

## Analysis

DURING TAKEOFF RUN THE RIGHT MAIN GEAR COLLAPSED. THE RIGHT WING DROPPED AND THE AIRCRAFT SPUN TO THE RIGHT. THE PLT DISCOVERED THAT THE RIGHT MAIN GEAR FAILED AT THE WELD. THE PILOT, WHO IS ALSO AN A & P MECHANIC, STATED THAT THIS WAS AN ORIGINAL WELD FROM THE FACTORY.

## Aircraft

- Registration: [N3693X](https://openairdocs.org/deregistered/N3693X-2012-11-08), registration cancelled 2012-11-08, S/N 1909R, built 1974 (OpenAirDocs)
- Reported make and model: Ayres S2R
- Registry model: [Aero Commander S2R](https://openairdocs.org/model/aero-commander-s2r) (registry code 0143022) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1909R
- Airframe hours: 2240
- Engines: WRIGHT R-1820-1 1200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Chapman Aviation
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, May 15, 1987
- Departed: WALLA WALLA, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 18,640 total, 2,000 in this make and model, 220 in the last 90 days, 8 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 5 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 55 °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 19870528081309A](https://openairdocs.org/incident/19870528081309A), May 28, 1987: Ayres S2RRESTD, Walla Walla, WA, Destroyed. Right main gear collapsed on the takeoff roll. Wing hit ground causing ground loop. Manufacturers gear weld failed.

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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