# NTSB SEA86LA134: Ayres S2R, N4000A, Hamer, ID, May 29, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 29, 1986, 11:45 local (17:45 UTC)
- Place: Hamer, ID
- Coordinates: 43.97927, -112.180122 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.9793&lon=-112.1801&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40414
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86LA134
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40414/pdf
- Page: https://openairdocs.org/ntsb/SEA86LA134

## Sequence of events

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

- Fire, maneuvering - aerial application
  - reason for occurrence undetermined (cause)
- Loss of engine power, maneuvering - aerial application
  - engine assembly,other - failure,total (cause)
  - engine assembly,push rod - disconnected (cause)
- On ground/water encounter with terrain/water, landing - roll

## Analysis

DURING AERIAL APPLICATION THE ENGINE CEASED OPERATING AND A SMALL FIRE ERUPTED. DURING FORCED LANDING THE LANDING GEAR WAS TORN OFF AND THE FUSELAGE BECAME TWISTED. AFTER LANDING, THE FIRE CONTINUED FOR A SHORT PERIOD OF TIME. POSTACCIDENT ENG TEARDOWN REVEALED THAT A ROD BOLT PIN HAD SHEARED.

## Aircraft

- Registration: N4000A (not matched to a registry record)
- Reported make and model: Ayres S2R
- Category: Airplane
- Serial number: 2460R
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Fire: In-Flight
- Flight: Aerial application, Part 137
- Operator: Lukes Ag Service
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, November 29, 1985, 74 hours before
- Departed: BIG GRASSE, ID

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 4,949 total, 74 in this make and model, 4,636 as pilot in command, 74 in the last 90 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 79 °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 19860529020099A](https://openairdocs.org/incident/19860529020099A), May 29, 1986: Ayres S2RR1340REST, Hammer, ID, Substantial damage. During spray swath, engine rod bolt pin failed and fire erupted. Safe landing in a field.

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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