# NTSB SEA85LA132: Grumman G-164A, N7997, Kendrick, ID, June 9, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 9, 1985, 08:30 local (14:30 UTC)
- Place: Kendrick, ID
- Coordinates: 46.47985, -116.119697 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.4798&lon=-116.1197&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40172
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA85LA132
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40172/pdf
- Page: https://openairdocs.org/ntsb/SEA85LA132

## 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
  - engine assembly,bearing - worn (cause)
  - eng assembly,blower/impeller/integral supercharger - binding(mechanical) (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - soft (contributing factor)
  - terrain condition - wet (contributing factor)

## Analysis

THE PLT HAD FINISHED SPRAYING A FIELD & WAS RETURNING TO THE AG STRIP WHEN THE ENG FAILED. HE MADE AN EMERG LANDING IN A BARLEY FIELD WHICH WAS MUDDY & SOFT. DURING THE LANDING ROLL, THE WHEELS SANK IN THE TERRAIN & THE ACFT NOSED OVER. AN EXAM REVEALED THAT THE BLOWER BEARINGS HAD FAILED & THE BLOWER HAD SEIZED.

## Aircraft

- Registration: [N7997](https://openairdocs.org/deregistered/N7997-2018-02-14), registration cancelled 2018-02-14, S/N 858, built 1971 (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)
- Category: Airplane
- Serial number: 858
- Airframe hours: 4010
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Hiemgartner Aviation
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, April 1, 1985, 14 hours before
- Departed: NONE, LELAND, ID
- Destination: NONE, KENDRICK, ID

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 34; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 3,300 total, 850 in this make and model, 3,200 as pilot in command, 105 in the last 90 days, 8 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: variable at 2 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 63 °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 19850609023619A](https://openairdocs.org/incident/19850609023619A), Jun 9, 1985: Scwzer G164A, Kendrick, ID, Substantial damage. Bearings for supercharger worn, unit failed. Emergency landing in muddy field. Aircraft nosed over onto its back.

## Other investigations on N7997 (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 CEN16CA277](https://openairdocs.org/ntsb/CEN16CA277), Jul 21, 2016: Grumman Acft ENG Cor-Schweizer G 164A (N7997), Topeka, KS, substantial damage. Probable cause: The pilot’s failure to maintain clearance from a wire during an agricultural flight.

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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