McDonnell Douglas DC-10-10

122 DC-10-10 airframes built (of 386 DC-10s total across all variants). The -10 was the short-range domestic version powered by GE CF6-6 engines and operated primarily by American, United, Continental, National, and Western. Passenger service in the US wound down through the 1990s; final scheduled passenger flights (Biman, Northwest) occurred in the mid-2000s, with the last commercial passenger operator (Biman) retiring the type in 2014.

In BlackBoxWiki Archive

Design Lineage

The DC-10-10 entered service with American Airlines in August 1971 as McDonnell Douglas's first widebody, competing directly with the Lockheed L-1011. Its three-engine layout — two under the wings, one through the vertical stabilizer — gave it twin-aisle economics on routes that couldn't fill a 747. The -10 variant used GE CF6-6 engines and a lower MTOW than the later -30/-40 international versions, and did not include the center-body landing gear fitted to heavier subtypes.

The Cargo Door Problem

The DC-10's outward-opening cargo door used an over-center latching mechanism that could indicate 'locked' while actually being under-latched. A partial door failure caused a near-disaster on American Airlines 96 over Windsor in 1972, followed by the catastrophic loss of Turkish Airlines 981 outside Paris in 1974 — 346 dead, the world's deadliest crash at the time. The floor above the cargo bay collapsed on decompression, severing the control cables that ran through it. The subsequent redesign (vent doors, revised latch geometry, floor-vent panels) became a template for how the industry treats decompression survivability.

AA191 and the Grounding

In May 1979, American Airlines 191 lost its left engine and pylon on rotation from Chicago O'Hare, rolled inverted, and crashed — 273 dead, still the deadliest accident on US soil. The cause was a maintenance shortcut: airlines were removing engine and pylon as a single unit using a forklift, cracking the aft pylon bulkhead. The FAA grounded the entire DC-10 fleet for 37 days — the last time a US-certified airliner type has been fully grounded on airworthiness grounds until the 737 MAX in 2019.

UA232 and Uncontained Failure

United 232 in 1989 lost all three hydraulic systems when the tail-mounted engine's fan disk failed and severed every hydraulic line at their common routing point behind the aft pressure bulkhead. The crew's use of differential thrust to steer the aircraft to Sioux City — with 185 of 296 surviving a crash landing — is a textbook case in CRM and airmanship, but it also exposed a design assumption (triple-redundant hydraulics converging in one physical location) that the industry no longer tolerates. Titanium fan-disk inspection intervals were tightened across the CF6 fleet.

Notable Accidents

• American 96· 1972
  Cargo door blew open over Windsor, Ontario; floor collapsed and severed control cables. Crew landed safely — but the warning was ignored for two years.
• Turkish 981· 1974
  Same cargo-door failure mode as AA96, this time catastrophic. Explosive decompression over Ermenonville forest, France; 346 fatalities.
• American 191· 1979
  Left engine and pylon separated on takeoff rotation from Chicago O'Hare after improper maintenance cracked the pylon bulkhead. 273 fatalities; entire DC-10 type grounded for 37 days.
• United 232· 1989
  Uncontained tail-engine fan-disk failure severed all three hydraulic systems. Crew used differential thrust to reach Sioux City; 185 of 296 survived a crash landing.