# NTSB CHI91DCJ03: Grumman G-164-A, N8842H, Edgar, NE, June 20, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: June 20, 1991, 06:00 local (11:00 UTC)
- Place: Edgar, NE
- Coordinates: 40.359558, -97.970031 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.3596&lon=-97.9700&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 24, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 14802
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI91DCJ03
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14802/pdf
- Page: https://openairdocs.org/ntsb/CHI91DCJ03

## Probable cause

THE PILOT'S INADEQUATE AIRCRAFT PREFLIGHT INSPECTION.

## Sequence of events

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

- On ground/water collision with object, landing - roll
  - lubricating system,oil cooler - blocked(partial)
  - aircraft preflight - inadequate, pilot in command (cause)
  - fluid,oil - overtemperature
  - precautionary landing - performed, pilot in command (contributing factor)
  - object - pole

## Analysis

THE PILOT STATED THAT ABOUT TEN MINUTES AFTER TAKEOFF HE NOTICED THE ENGINE OIL TEMPERATURE WAS EXCESSIVE.  HE MADE A PRECAUTIONARY LANDING ON A ROAD.  DURING THE LANDING ROLL, THE LEFT WING STRUCK A POST, AND THE AIRPLANE VEERED INTO A DITCH.  POST ACCIDENT INVESTIGATION REVEALED THAT THE OVERHEATING PROBLEM WAS CAUSED BY A RAG WHICH WAS PARTIALLY BLOCKING THE OIL COOLER.

## Aircraft

- Registration: [N8842H](https://openairdocs.org/deregistered/N8842H-2017-08-28), registration cancelled 2017-08-28, S/N 1537, built 1975 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164-A
- 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: 1537
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: James W. Wehrman
- Registered owner: James W. Wehrman
- Departed: NONE, EDGAR, NE

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 3,900 total, 1,200 in this make and model

## Weather

- Conditions: Visual (VMC), Dawn
- Wind: 170° at 15 knots
- Visibility: 7 statute miles
- Lowest ceiling: 15,000 ft broken
- Temperature: 72 °F, dew point 61 °F
- Altimeter: 29.00 inHg
- Observed at: HSI, 28 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 19910620023769A](https://openairdocs.org/incident/19910620023769A), Jun 20, 1991: Scwzer G164A, Edgar, NE, Substantial damage. Engine overheated. Landed on a road to check. Wind struck gas meter pipe. A rag was covering the oil cooler.

## Other investigations on N8842H (2)

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 CHI96LA281](https://openairdocs.org/ntsb/CHI96LA281), Aug 7, 1996: Grumman-Schweizer G-164 (N8842H), Grant, NE, substantial damage. Probable cause: fatigue failure and subsequent catastrophic failure of the number nine cylinder. A factor was the corn.
- [NTSB MKC79DCQ30](https://openairdocs.org/ntsb/MKC79DCQ30), Jun 17, 1979: Grumman G-164A (N8842H), Moscow, KS, destroyed

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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