# NTSB NYC90DFJ04: Schweizer Grumman G-164A, N48395, Wayland, NY, August 30, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 30, 1990, 08:30 local (12:30 UTC)
- Place: Wayland, NY
- Coordinates: 42.559555, -77.589584 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.5596&lon=-77.5896&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 12, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 36492
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC90DFJ04
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/36492/pdf
- Page: https://openairdocs.org/ntsb/NYC90DFJ04

## Probable cause

A CRACKED ENGINE CYLINDER ASSEMBLY, WHICH RESULTED IN LOSS OF ENGINE POWER.

## 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, maneuvering - aerial application
  - engine assembly,cylinder - cracked (cause)
- Forced landing, landing
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - crop

## Analysis

THE PILOT STATED THAT AFTER ABOUT 20 MINUTES OF AERIAL APPLICATION, THE AIRPLANE ENGINE 'BEGAN SPUTTERING AND BACKFIRING....THE ENGINE QUIT.'  THE PILOT MADE A LEFT TURN TO AVOID OBSTACLES, AND LANDED. DURING THE LANDING ROLL, THE AIRPLANE'S LEFT WING CONTACTED THE EDGE OF A MATURE CORN FIELD, AND THE AIRPLANE SPUN APPROXIMATELY 120 DEGREES BEFORE IT CAME TO A STOP. EXAMINATION OF THE RADIAL ENGINE REVEALED A CRACK IN THE NUMBER 1 CYLINDER WHICH EXTENDED FROM THE RIGHT SIDE OF THE FRONT SPARK PLUG TO THE BACK SIDE OF THE CYLINDER INTAKE PORT; THE AIR FILTER WAS BLOWN THROUGH THE INDUCTION INTAKE. THERE WAS NO OTHER EVIDENCE OF MECHANICAL MALFUNCTION.

## Aircraft

- Registration: [N48395](https://openairdocs.org/deregistered/N48395-2016-09-13), registration cancelled 2016-09-13, S/N 1628, built 1976 (OpenAirDocs)
- Reported make and model: SCHWEIZER GRUMMAN G-164A (GRUMMAN G-)
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1628
- Airframe hours: 4655
- Engines: P&W R-1340AN 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Gerald L. Alderman
- Registered owner: Marquart Air Service, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, March 13, 1990, 262 hours before
- Departed: NONE, WALLACE, NY

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 8,737 total, 3,737 in this make and model, 8,737 as pilot in command, 250 in the last 90 days, 70 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Lowest ceiling: none
- Temperature: 70 °F, dew point -0 °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 19900830037499A](https://openairdocs.org/incident/19900830037499A), Aug 30, 1990: Scwzer G164A, Wayland, NY, Substantial damage. Engine failed during a spray run. Cartwheeled on landing in a corn field. Cause was a cracked cylinder.

## Other investigations on N48395 (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 NYC05LA129](https://openairdocs.org/ntsb/NYC05LA129), Aug 6, 2005: Grumman-Schweizer G-164A (N48395), Penn Yan, NY, substantial damage. Probable cause: The loss of engine power due to a fatigue fractured pushrod.

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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