7 fatalities

Stabilizer Shaft Failure Leads to Crash of US Air Force Aircraft in Maine's Elephant Mountain Range (53-0406)

Greenville, United States of AmericaFlight

On January 24, 1963, a Boeing B-52 Stratofortress (registration 53-0406) operated by United States Air Force - USAF (since 1947) was involved in an aviation accident near Greenville, United States of America in flight. 7 people were killed. Investigators recorded the probable cause as: Failure of the stabilizer shaft that broke during a low-level exercise. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-12Data APIEditorial standards

During a low-level training flight from Westover AFB, the aircraft lost control and crashed in the Elephant Mountain Range. Three crew members bailed out; seven were killed and two survived. Investigation attributed the accident to failure of the stabilizer shaft.

Overview

A US Air Force aircraft on a training flight from Westover Air Force Base crashed in the Elephant Mountain Range near Greenville after control was lost at low altitude. Three crew members successfully bailed out before impact. Seven crew members were killed, and two survived.

Crew

The 99th Bombardment Squadron crew consisted of nine members:

  • Lt Col Dante Bulli, pilot
  • Maj Robert J. Morrison, copilot
  • Cpt Gerald Adler, navigator (†)
  • Lt Col Joe R. Simpson Jr. (†)
  • Maj William W. Gabriel (†)
  • Maj Robert J. Hill (†)
  • Cpt Herbert L. Hansen (†)
  • T/Sgt Michael F. O'Keefe (†)
  • Cpt Charles G. Leuchter (†)

Those marked with a dagger (†) were among the seven fatalities.

Probable Cause

The official investigation determined the probable cause to be failure of the stabilizer shaft, which broke during a low-level exercise.