Casualties unknown

1992-06-06: Wsk Pzl Mielec PZL-M-18 (N4685R) — A-1 Aviation Inc. — Spangle, WA

Spangle, WA, US

On June 6, 1992, a Wsk Pzl Mielec PZL-M-18 (registration N4685R) operated by A-1 Aviation Inc. was involved in an aviation accident near Spangle, WA. Investigators recorded the probable cause as: ALTITUDE WAS NOT ATTAINED. A FACTOR TO THE ACCIDENT WAS: LOAD JETTISON WAS NOT POSSIBLE. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

During an aerial application flight, the aircraft could not gain altitude after takeoff, leading to a forced landing in an open field. The load could not be jettisoned due to a clogged nozzle, and the aircraft collided with rough terrain. No mechanical failure was found.

Incident Overview

At the beginning of an aerial application flight, the owner of the airplane reported that the aircraft was loaded with approximately 300 gallons of chemical. After lifting off from a gravel runway, the airplane would not gain altitude. The pilot then flew the airplane in ground effect over a ditch at the end of the runway and continued for a forced landing to an open field.

Attempted Load Jettison

The pilot attempted to jettison the load; however, due to a clogged nozzle, the load could not be dumped. This prevented any reduction in weight during the forced landing approach.

Collision with Terrain

During the landing roll, the airplane collided with the rough terrain. The specific nature of the terrain was not described, but the impact occurred while the aircraft was still moving on the ground.

Post-Incident Inspection

Following the incident, the owner had the engine inspected and reported that there was no evidence of a mechanical failure or malfunction. No other systems were examined for potential issues.

Key Details

  • The airplane was loaded with approximately 300 gallons of chemical.
  • The takeoff was from a gravel runway.
  • The pilot flew in ground effect over a ditch before the forced landing.
  • The attempted load jettison failed due to a clogged nozzle.
  • The collision occurred during the landing roll in rough terrain.
  • No mechanical failure was found in the engine.

The report does not specify the aircraft type, registration, number of occupants, injuries, or any other contextual factors.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X15016. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.