# NTSB DEN92LA082: Grumman G-164A, N6646, Del Norte, CO, August 5, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 5, 1992, 10:15 local (16:15 UTC)
- Place: Del Norte, CO
- Coordinates: 37.669307, -106.349624 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.6693&lon=-106.3496&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): 18230
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN92LA082
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18230/pdf
- Page: https://openairdocs.org/ntsb/DEN92LA082

## Probable cause

INADVERTENT STALL WHILE MANEUVERING DURING AERIAL APPLICATION AT AN ALTITUDE INSUFFICIENT FOR RECOVERY.

## Sequence of events

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

- Loss of control - in flight, maneuvering - aerial application
  - stall/mush - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

WHILE CONDUCTING A TURN TO REVERSE DIRECTION DURING AERIAL APPLICATION, THE PILOT INADVERTENTLY STALLED THE AIRCRAFT. ALTITUDE WAS INSUFFICIENT TO EFFECT RECOVERY.

## Aircraft

- Registration: [N6646](https://openairdocs.org/deregistered/N6646-1995-05-23), registration cancelled 1995-05-23, S/N 771 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a) (registry code 3952704) (OpenAirDocs)
- Category: Airplane
- Serial number: 771
- Airframe hours: 7117
- Engines: P&W R1340 600 horsepower reciprocating
- Damage: Destroyed
- Flight: Aerial application, Part 137
- Operator: S L V Crop Care, Inc.
- Registered owner: S L V Crop Care, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, May 19, 1992, 225 hours before
- Departed: MVI, MONTE VISTA, CO
- Destination: MVI

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 4,413 total, 1,437 in this make and model, 4,412 as pilot in command, 225 in the last 90 days, 225 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 5° at 3 knots
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 61 °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 19920805029119A](https://openairdocs.org/incident/19920805029119A), Aug 5, 1992: Scwzer G164A, Delnorte, CO, Destroyed. Stalled in a procedure turn around. Impact destroyed aircraft.

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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