B-47E Stratojet 52-0470 Collins, New York April 10, 1958
The U.S. Air Force accident report for the loss of B-47E 52-0470 describes a sudden, catastrophic structural failure occurring during a high-altitude training maneuver. The aircraft disintegrated in mid-air, leaving no opportunity for crew survival.
The report notes that the breakup sequence began near the fuselage center section, consistent with known fatigue cracking issues documented in other B-47 accidents of the era.
Investigators concluded that the initial failure occurred in the fuselage longeron/center section area. This structural zone was later reinforced under Project Milk Bottle due to widespread cracking.
The right wing separated first, followed by explosive disintegration of the fuselage. The breakup was instantaneous, matching the witness accounts collected at the scene.
The aircraft was performing a steep banking maneuver at the time of failure. This maneuver placed extreme loads on the airframe, particularly the wing roots and fuselage frames.
The report states that there was no evidence of an onboard fire or explosion prior to structural failure. The fire observed by witnesses occurred after breakup, as debris ignited upon impact.
Metallurgical analysis revealed fatigue cracking in several recovered components. These findings were consistent with other B-47 losses and contributed to the urgency of the Milk Bottle reinforcement program.
The aircraft experienced a sudden structural failure during a high-stress maneuver, resulting in immediate in-flight breakup. The sequence of failure is consistent with fatigue cracking previously documented in B-47 airframes.
This excerpt is quoted within allowable limits. The full report is summarized here for clarity.