# NTSB DEN82DA121: Ayres S-2C, N1648S, Greeley, CO, June 29, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: June 29, 1982, 09:30 local (15:30 UTC)
- Place: Greeley, CO
- Coordinates: 40.339721, -104.700668 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.3397&lon=-104.7007&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 29, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 70896
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN82DA121
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/70896/pdf
- Page: https://openairdocs.org/ntsb/DEN82DA121

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise - normal
  - fluid,oil - starvation (cause)
  - engine assembly,camshaft - failure,partial (cause)
  - engine assembly,master rod - failure,partial (cause)
  - engine assembly,piston - failure,partial (cause)
- Forced landing, landing - flare/touchdown
  - load jettison - performed, pilot in command
- Main gear collapsed, landing - roll
  - terrain condition - rough/uneven (contributing factor)
  - landing gear,main gear - overload

## Analysis

AFTER TAKEOFF THE PLT NOTICED THE OIL TEMP WAS INCREASING & THE ENG BEGAN LOSING POWER AT ABOUT 100 FT AGL. HE WAS UNABLE TO GAIN ANY ADDITIONAL ALTITUDE. HE CONTINUED FLYING FOR ANOTHER 15 MINUTES WHEN THE ENG FAILED COMPLETELY. THE ENG TEARDOWN & INSPECTION REVEALED THAT THE CAM REDUCTION GEAR BUSHINGS, NOSE CASE PARTS & ENG SHOWED SIGNS OF OIL STARVATION. THE MASTER ROD BEARING HAD SEIZED. THE CAM REDUCTION GEAR HAD BROKEN & THE CAM SHAFT DAMAGED. THE MAIN CASES, RODS & PISTONS WERE DAMAGED. THE OIL PUMP WAS FOUND OPERATIONAL.

## Aircraft

- Registration: [N1648S](https://openairdocs.org/deregistered/N1648S-2002-12-03), registration cancelled 2002-12-03, S/N 600-1204C, built 1964 (OpenAirDocs)
- Reported make and model: AYRES S-2C
- Registry model: [Snow 600-S2C](https://openairdocs.org/model/snow-600-s2c) (registry code 8380302) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 6001204C
- Airframe hours: 4097
- Engines: P&W R-1340-AN-1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 137
- Operator: Easton Aerial Sprayers
- Registered owner: Associated Aerial Applicators,
- Departed: 11V, LASALLE, CO
- Destination: RON COOK FARM, CO
- Airport: I8V, Platte Valley

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 3,170 total, 2,170 in this make and model, 2,920 as pilot in command, 140 in the last 90 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 5 knots
- Visibility: 65 statute miles
- Temperature: 163 °F
- Altimeter: 30.00 inHg
- Observed at: DEN, 25 nm away

## 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 19820629027379A](https://openairdocs.org/incident/19820629027379A), Jun 29, 1982: Ayres S2C, Greeley, CO, Substantial damage. Crash occurred during emergency landing after engine failure.

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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