Air Tractor AT-301 N23069

Summary

On 5 April 1987 at about 21:00 local time, a Air Tractor AT-301 registered N23069 was involved in an accident near Conrad, Montana, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

5 April 1987 at 21:00

Classification

Accident

Location

Conrad, Montana, United States

Coordinates

48.1995, -111.8504

Aircraft

Air Tractor AT-301

Registration

N23069

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 137: Agricultural

Purpose of flight

Aerial Application

Phase of flight

Not recorded

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

DEN87LA084

Nobody was injured.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

AN AG PLT WAS RETURNING FROM AN AERIAL APPLICATION. SIX MILES FROM THE DESTINATION ARPT THE ENGINE QUIT. THE PLT ATTEMPTED TO LAND ON A ROAD BUT THE ACFT STRUCK THE EDGE OF A PIT, SPUN ACROSS THE ROAD AND CAME TO REST FACING 180 DEGREES FROM THE ORIGINAL HEADING. ENGINE EXAMINATION DISCLOSED SUPERCHARGER IMPELLER DAMAGE TYPICAL OF FOREIGN OBJECT INGESTION. FIVE OF THE NINE CYLINDERS HAD LOW COMPRESSION AND SHOWED METAL PARTICLES ON PISTON AND VALVE SURFACES. THE LEFT MAGNETO HAD BRASS, COPPER, AND ALUMINUM PARTICLES THROUGHOUT THE INTERIOR AND FAILED TO PRODUCE SPARK WHEN ROTATED. THE RIGHT MAGNETO DID PRODUCE SPARK WHEN ROTATED BUT THREE OF THE NINE PLUGS SERVED BY THIS MAGNETO WERE METAL FOULED IN THE ELECTRODES.

Quoted verbatim from the NTSB record.