# NTSB MKC89LA148: Grumman G-164B, N6629Q, Stockville, NE, July 2, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 2, 1989, 12:00 local (17:00 UTC)
- Place: Stockville, NE
- Coordinates: 40.529598, -100.380043 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.5296&lon=-100.3800&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 29, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 34822
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC89LA148
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34822/pdf
- Page: https://openairdocs.org/ntsb/MKC89LA148

## Probable cause

TOTAL FAILURE OF THE POWERPLANT CAUSED BY A BROKEN CYLINDER.

## 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
  - powerplant - failure,total (cause)
  - engine assembly,cylinder - failure,total (contributing factor)
  - emergency procedure - attempted, pilot in command (contributing factor)
- Forced landing, descent - emergency
- In flight collision with terrain/water, descent - emergency
  - terrain condition - none suitable (contributing factor)

## Analysis

THE PILOT SAID THAT DURING AN AERIAL APPLICATION OPERATION, THE ENGINE SUSTAINED A TOTAL MECHANICAL FAILURE. AN EMERGENCY LDG WAS ATTEMPTED WHICH RESULTED IN SUBSTANTIAL DAMAGE TO THE ACFT AND NO INJURIES TO THE PLT. POST ACCIDENT INVESTIGATION REVEALED A BROKEN CYLINDER TO BE THE CAUSE OF THE ENGINE FAILURE.

## Aircraft

- Registration: [N6629Q](https://openairdocs.org/deregistered/N6629Q-2014-11-12), registration cancelled 2014-11-12, S/N 155B, built 1976 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164B
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b) (registry code 3952802) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 155B
- Engines: P&W R-985-ANI 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Nelson, Kenneth R., doing business as Nelson Flying Service
- Registered owner: Ealy Spraying Service, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Departed: 47V, CURTIS, NE

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 5,000 total, 4,600 in this make and model, 200 in the last 90 days, 150 in the last 30 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 57 °F
- Altimeter: 29.00 inHg
- Observed at: MCK, 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 19890702019579A](https://openairdocs.org/incident/19890702019579A), Jul 2, 1989: Scwzer G164B, Stockville, NE, Substantial damage. Engine quit due to a cylinder failure during aerial applilcation. Crashed during the emergency landing.

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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