# NTSB CHI92DTG04: Grumman G-164B, N48687, Grandin, ND, August 14, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 14, 1992, 13:00 local (18:00 UTC)
- Place: Grandin, ND
- Coordinates: 47.229694, -97.000679 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.2297&lon=-97.0007&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 26, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15260
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92DTG04
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15260/pdf
- Page: https://openairdocs.org/ntsb/CHI92DTG04

## Probable cause

THE CRACKED CYLINDER WHICH RESULTED IN A FORCED LANDING. THE LACK OF SUITABLE TERRAIN ON WHICH TO MAKE AN EMERGENCY LANDING WAS A FACTOR.

## 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,cylinder - cracked (cause)
- In flight collision with object, descent - emergency
- On ground/water collision with object, landing - roll
  - object - vehicle (contributing factor)
  - terrain condition - none suitable

## Analysis

AERIAL APPLICATOR WAS CONDUCTING SPRAY OPERATION WHEN ENGINE BEGAN TO RUN INTERMITTENTLY.  FIELD WAS NOT SUITABLE FOR LANDING SO HE ELECTED TO ATTEMPT LANDING ON A ROAD BEHIND A GRAIN TRUCK WHICH WAS TRAVELLING IN THE SAME DIRECTION THAT HE WAS GOING TO LAND.  JUST BEFORE TOUCHDOWN, ENGINE CAUGHT AND GAVE HIM A SHORT BURST OF POWER.  AIRPLANE ACCELERATED MOMENTARILY AND LANDED IN THE BED OF THE GRAIN TRUCK, THEN FELL OFF, AND CAME TO A STOP.

## Aircraft

- Registration: [N48687](https://openairdocs.org/deregistered/N48687-2016-11-03), registration cancelled 2016-11-03, S/N 157B, 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: 157B
- Airframe hours: 4439
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Wischer Aviation, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, April 27, 1992, 302 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 4,930 total, 1,683 in this make and model, 4,871 as pilot in command, 310 in the last 90 days, 140 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 11 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point 48 °F
- Altimeter: 30.00 inHg
- Observed at: GFK, 40 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 19920814031429A](https://openairdocs.org/incident/19920814031429A), Aug 14, 1992: Scwzer G164B, Grandin, ND, Substantial damage. Lost power landed on top of grain truck while landing on road. NR4 cylinder had cracked.

## Other investigations on N48687 (3)

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 CEN15LA271](https://openairdocs.org/ntsb/CEN15LA271), Jun 12, 2015: Grumman Acft ENG Cor-Schweizer G 164B (N48687), Foster, NE, substantial damage. Probable cause: The total loss of engine power during a low-level aerial application flight due to fuel exhaustion following the pilot’s inadequate preflight inspection that led to his assumption that sufficient…
- [NTSB CHI91DTG03](https://openairdocs.org/ntsb/CHI91DTG03), Jun 16, 1991: Schweizer G164 (N48687), Gwinner, ND, substantial damage. Probable cause: INADVERTENT CLOSING OF THE MIXTURE BY THE PILOT. FACTORS RELATED TO THE ACCIDENT ARE INADEQUATE CONTROL SHAPE, OR SIZE, AND INATTENTIVENESS OF THE PILOT.
- [NTSB FTW83LA405](https://openairdocs.org/ntsb/FTW83LA405), Aug 31, 1983: Grumman G-164B (N48687), East Bernard, TX, substantial damage

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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