# NTSB ATL82DA230: Grumman G164B, N6637Q, Opp, AL, August 6, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 6, 1982, 18:30 local (22:30 UTC)
- Place: Opp, AL
- Coordinates: 31.289644, -86.249794 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=31.2896&lon=-86.2498&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 6, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 72097
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL82DA230
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/72097/pdf
- Page: https://openairdocs.org/ntsb/ATL82DA230

## Sequence of events

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

- Nose over, landing - roll
  - wing,bracing wire - vibration
  - precautionary landing - performed, pilot in command
  - terrain condition - rough/uneven (contributing factor)
  - brakes(normal) - improper use of, pilot in command (cause)

## Analysis

THE PILOT REPORTED THAT WHILE HE WAS SPRAYING, VIBRATIONS OCCURRED IN THE LEFT FLYING WIRES. HE HAD EXPERIENCED THE VIBRATIONS BEFORE, BUT THIS TIME, THEY SEEMED WORSE, HE ELECTED TO LAND IN A NEARBY PASTURE TO EXAMINE THE AIRCRAFT. DURING THE LANDING ROLL-OUT, THE AIRCRAFT WENT OVER A TERRACE WHILE THE PILOT WAS APPLLYING HEAVY BRAKING ACTION. HE STATED THE AIRCRAFT BOUNCED SLIGHTLY AND THE BRAKES LOCKED. THE AIRCRAFT NOSED OVER.

## Aircraft

- Registration: [N6637Q](https://openairdocs.org/deregistered/N6637Q-2004-07-14), registration cancelled 2004-07-14, S/N 167B, built 1976 (OpenAirDocs)
- Reported make and model: GRUMMAN G164B
- 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: 167B
- Airframe hours: 1724
- Engines: P & W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Robert Dirk Merrill
- Registered owner: Pioneer Crop Care
- Departed: SAMSON, AL
- Destination: SAMSON, AL

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 27; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 2,060 total, 744 in this make and model, 1,988 as pilot in command, 250 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 7 statute miles
- Temperature: 181 °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 19820806035379A](https://openairdocs.org/incident/19820806035379A), Aug 6, 1982: Scwzer G164B, Opp, AL, Substantial damage. Pilot felt vibrations and during precautionary landing aircraft hit terrace causing it ot flip inverted.

## Other investigations on N6637Q (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 CHI93LA303](https://openairdocs.org/ntsb/CHI93LA303), Jul 27, 1993: Schweizer G167B (N6637Q), Borup, MN, substantial damage. Probable cause: the loss of engine power due to a cracked cylinder head.

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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