# NTSB LAX85LA332: Gulfstream-Schweizer Gulfstream AM G-164B, N8133K, Poston, AZ, July 29, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 28, 1985, 22:30 local (Jul 29, 1985, 05:30 UTC)
- Place: Poston, AZ
- Coordinates: 33.830219, -114.380935 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.8302&lon=-114.3809&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 24783
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX85LA332
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24783/pdf
- Page: https://openairdocs.org/ntsb/LAX85LA332

## 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
  - proper alignment - not attained, pilot in command (cause)
  - airspeed - not maintained, pilot in command (cause)
  - stall/mush - not corrected, pilot in command (cause)
- Forced landing, descent - emergency
  - load jettison - not attained, pilot in command
- Nose over, landing - flare/touchdown

## Analysis

THE PLT REPORTED WEATHER CONDITIONS DURING THE NIGHT AERIAL APPLICATION FLT WERE 'CLEAR AND WINDS OF 15 KTS WITH GUSTS TO 20 KTS. AFTER THREE UNSUCCESSFUL ATTEMPTS TO LINE UP FOR THE SPRAY RUN, THE PLT SAID HE ALLOWED THE ACFT TO 'GET TOO LOW AND SLOW' WHILE TURNING FOR ANOTHER RUN AND WAS LATE RECOGNIZING THE PROBLEM AND ADDING POWER. AS THE ACFT SETTLED TOWARD THE GROUND, THE PLT TRIED TO JETTISON THE HOPPER LOAD WITH LESS THAN FULL DUMP GATE CONTROL HANDLE MOVEMENT, BUT THE GATE DID NOT FUNCTION. AFTER TOUCHDOWN IN THE PLOWED FIELD, THE ACFT NOSED OVER. FUNCTIONAL TESTING OF THE DUMP GATE AFTER THE ACCIDENT REVEALED THAT IT WORKED WITH FULL CONTROL HANDLE MOVEMENT.

## Aircraft

- Registration: [N8133K](https://openairdocs.org/aircraft/N8133K), registered now, S/N 579B (OpenAirDocs)
- Reported make and model: Gulfstream-Schweizer GULFSTREAM AM G-164B (GULFSTREAM)
- Registry model: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B](https://openairdocs.org/model/gulfstream-schweizer-a-c-gulfstream-am-g-164b) (registry code 3979904) (OpenAirDocs)
- Category: Airplane
- Serial number: 579B
- Airframe hours: 1926
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: John Kamburoff Aerial Spray
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, July 20, 1985, 43 hours before
- Departed: POSTON, AZ

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 3,200 total, 1,000 in this make and model, 3,031 as pilot in command, 250 in the last 90 days, 140 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 335° at 15 knots, gusting 20
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 90 °F
- Observed at: 1

## 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 19850728034689A](https://openairdocs.org/incident/19850728034689A), Jul 28, 1985: Scwzer G164B, Poston, AZ, Substantial damage. Allowed aircraft to get too low and slow during turn to swath run at night. Settled into field and nosed over.

## Other investigations on N8133K (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 LAX93LA361](https://openairdocs.org/ntsb/LAX93LA361), Sep 20, 1993: Gulfstream-Schweizer G-164B (N8133K), Buttonwillow, CA, substantial damage. Probable cause: THE PILOT'S FAILURE TO AVOID WIRES.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.