# NTSB MKC89LA170: Grumman G-164B, N8116K, Portland, AR, July 28, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 28, 1989, 07:30 local (12:30 UTC)
- Place: Portland, AR
- Coordinates: 33.22985, -91.51052 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.2298&lon=-91.5105&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): 34839
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC89LA170
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34839/pdf
- Page: https://openairdocs.org/ntsb/MKC89LA170

## Probable cause

ENGINE FAILURE DUE TO FAILURE OF AN ENGINE 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
  - engine assembly,cylinder - cracked (cause)
  - load jettison - performed, pilot in command
  - engine assembly,cylinder - failure,total (cause)
  - emergency procedure - initiated, pilot in command
- Forced landing, descent - emergency

## Analysis

WHILE CONDUCTING AN AERIAL APPLICATION OPERATION, THE PLT SAID THAT HE EXPERIENCED A GRADUAL LOSS OF POWER. HE DUMPED HIS CHEMICAL LOAD AND ATTEMPTED TO RETURN TO HIS BASE AIRFIELD. ENROUTE, THE ENGINE QUIT COMPLETELY, AND AN EMERGENCY LDG WAS ATTEMPTED IN A SOFT FARM FIELD, THAT RESULTED IN A NOSE OVER. POST ACCIDENT INVESTIGATION RVEALED #1 CYLINDER HAD FAILED CAUSING THE POWER FAILURE.

## Aircraft

- Registration: [N8116K](https://openairdocs.org/aircraft/N8116K), registered now, S/N 572B, built 1979 (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 R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 572-B
- Airframe hours: 4861
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Chris Air Inc.
- Registered owner: Tindall, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, January 27, 1989, 152 hours before
- Departed: PORTLAND, AR
- Airport: Reed, Pvt, runway 18, 2,200 × 30 ft, dirt

## 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: 19,400 total, 10,000 in this make and model, 200 in the last 90 days, 75 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 10° at 6 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 79 °F
- Altimeter: 30.00 inHg
- Observed at: GLH, 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 19890728025769A](https://openairdocs.org/incident/19890728025769A), Jul 28, 1989: Scwzer G164B, Portland, AR, Substantial damage. Engine lost power on spray run dumped load and headed for base. Engine quit. Nosed over landing. NR1 cylinder broke

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.