Pan Am 103, Lockerbie, 21 December 1988

On 21 December 1988, Pan Am Flight 103 was destroyed by a bomb over Lockerbie, Scotland.

259 people aboard died — 243 passengers and 16 crew — along with 11 residents of Lockerbie, killed when wreckage fell on the town. 270 in total.

The aircraft

N739PA, a Boeing 747-121 named Clipper Maid of the Seas, one of the early 747-100s.

What happened

An explosive device in the forward cargo hold detonated at 31,000 feet, blowing a hole roughly 50 cm across in the fuselage. At that altitude and speed, a breach of that size in a pressurised structure does not stay local: the aircraft broke apart within seconds.

What followed

The investigation was one of the largest ever conducted, and the case remained in the courts for decades.

For aviation more broadly, Lockerbie reshaped security. The most consequential change was baggage reconciliation — the requirement that hold baggage travels only when its passenger is aboard, so that a bag cannot be checked in and then abandoned. Screening of hold baggage, and the sharing of threat intelligence between airlines and governments, were also overhauled.

It also exposed how badly warnings had been handled: a specific threat warning received before the flight was found, the day after the bombing, under a pile of papers on a desk.

Pan Am — the airline that had launched the 747 in 1970 and had ordered it into existence — ceased operations in 1991.

Related

• All 747 accidents
• The 747-100
• Airlines that flew the 747