# NTSB LAX88DUJ05: Grumman G-164B, N6747Q, Parker, AZ, July 21, 1988

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: July 20, 1988, 21:02 local (Jul 21, 1988, 04:02 UTC)
- Place: Parker, AZ
- Coordinates: 34.080509, -114.21997 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.0805&lon=-114.2200&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report December 3, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 25726
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX88DUJ05
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25726/pdf
- Page: https://openairdocs.org/ntsb/LAX88DUJ05

## Sequence of events

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

- In flight encounter with weather, cruise - normal
  - weather condition - sand/dust storm (contributing factor)
  - in-flight planning/decision - poor, pilot in command (cause)
- Loss of control - in flight, cruise - normal
  - flight into known adverse weather - intentional, pilot in command (cause)
  - spatial disorientation, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

DURING AN AERIAL APPLICATION FLIGHT, THE PILOT DISPENSED THE LOAD AND WAS RETURNING TO THE AIRSTRIP DUE TO AN APPROACHING THUNDERSTORM. ENROUTE, THE VISIBILITY WAS REDUCED TO NEAR ZERO FROM BLOWING DUST. THE PILOT LOST CONTROL OF THE AIRPLANE AND COLLIDED WITH THE TERRAIN. THERE WERE NO REPORTED MECHANICAL FAILURES OR MALFUNCTIONS AT THE TIME OF THE ACCIDENT.

## Aircraft

- Registration: [N6747Q](https://openairdocs.org/deregistered/N6747Q-1992-10-14), registration cancelled 1992-10-14, S/N 260B (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)
- Category: Airplane
- Serial number: 260B
- Airframe hours: 5061
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Destroyed
- Flight: Aerial application, Part 137
- Operator: J. Kamburoff, Aerial Spray Inc
- Registered owner: John Kamburoff Aerial Spray
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Continuous airworthiness, June 15, 1988, 43 hours before
- Departed: POSTON, AZ

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 15,447 total, 8,000 in this make and model, 15,360 as pilot in command, 211 in the last 90 days, 130 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Dusk
- Wind: 90° at 25 knots, gusting 30
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 90 °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 19880720027239A](https://openairdocs.org/incident/19880720027239A), Jul 20, 1988: Scwzer G164B, Poston, AZ, Destroyed. Caught in blowing dust from nearby thunderstorm en route to base at night. Lost control and crashed.

## Other investigations on N6747Q (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 LAX79FUJ86](https://openairdocs.org/ntsb/LAX79FUJ86), May 3, 1979: Grumman G-164B (N6747Q), Poston, AZ, substantial damage
- [NTSB LAX79DUJ01](https://openairdocs.org/ntsb/LAX79DUJ01), Oct 2, 1978: Grumman G-164B (N6747Q), Poston, AZ, 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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