# NTSB MKC82DA085: Grumman G-164A, N7689, Tekamah, NE, May 20, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: May 20, 1982, 06:20 local (11:20 UTC)
- Place: Tekamah, NE
- Coordinates: 41.770561, -96.220733 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.7706&lon=-96.2207&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 20, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 72800
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC82DA085
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/72800/pdf
- Page: https://openairdocs.org/ntsb/MKC82DA085

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application
  - engine assembly,camshaft - failure,total (cause)
  - engine assembly,valve,intake - movement restricted (cause)
  - engine assembly,valve,intake - open (cause)
- Forced landing, landing
- Nose over, landing - roll
  - terrain condition - open field (contributing factor)
  - terrain condition - soft (contributing factor)

## Analysis

ON THE THIRD SPRAY RUN THE PILOT STATED THAT THE AIRCRAFT ENGINE HAD A LOSS OF POWER. HE ATTEMPTED TO FLY BACK TO THE AIRPORT BUT WAS FORCED TO MAKE AN EMERGENCY LANDING IN AN OPEN FIELD. DURING THE LANDING ROLL THE AIRCRAFT NOSED OVER IN THE SOFT MUD. ENGINE TEARDOWN REVEALED A CAMSHAFT ROLLER, P/N 59-99, FAILED CAUSING A VALVE TO STICK IN THE OPEN POSITION.

## Aircraft

- Registration: [N7689](https://openairdocs.org/aircraft/N7689), registered now, S/N 926, built 1972 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- 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 R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 921
- Engines: P&W R-985-AN1 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Har-Mor Ag Air, Inc.
- Registered owner: Har-Mor Ag Air, Inc.
- Departed: TEKAMAH, NE
- Destination: TEKAMAH, NE
- Airport: Tekamah, runway 14, 2,900 × 0 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 4,000 total, 55 in this make and model, 50 in the last 90 days, 50 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 135° at 3 knots
- Visibility: 3 statute miles
- Lowest ceiling: 3,000 ft broken
- Temperature: 154 °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 19820520017549A](https://openairdocs.org/incident/19820520017549A), May 20, 1982: Grumav G164A, Tekamah, NE, Substantial damage. Engine quit on spray run. Nosed over landing. Camshaft roller pin PN5999 failed.

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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