McDonnell Douglas · Widebody · Retired

McDonnell Douglas DC-10

Tomás Del Coro from Las Vegas, Nevada, USA — CC BY-SA 2.0

The McDonnell Douglas DC-10 is a three-engine, wide-body commercial airliner developed in response to a 1966 American Airlines specification for a high-capacity aircraft capable of operating from shorter runways than the Boeing 747. Featuring two underwing turbofans and a third engine embedded in the base of the vertical stabilizer, the trijet became a foundational pillar of long-haul and transcontinental aviation throughout the 1970s and 1980s.

Despite encountering severe early safety scrutiny and temporary fleet groundings following high-profile incidents, the DC-10 matured into a reliable workhorse. Its structural longevity is underscored by the conversion of numerous airframes into freighter configurations for FedEx Express, as well as specialized adaptations including the KC-10 Extender military tanker and aerial firefighting air tankers.

By The Numbers

Manufactured by McDonnell Douglas in Long Beach, California, the DC-10 trijet program achieved a total production run of 386 commercial aircraft between 1968 and 1989. In addition to these civilian airframes, 60 KC-10 Extender tanker variants were built for the United States Air Force, bringing total production to 446 units. The family was constructed across several iterations, including the domestic Series 10 alongside the intercontinental Series 30 and Series 40.

Scheduled passenger operations for the DC-10 concluded when the type was retired from commercial service, and major legacy cargo operators like FedEx Express have since phased out their remaining MD-10 derivatives. Today, remaining active airframes operate in specialized capacities rather than standard airline service. Specialized operators heavily utilize the type in North America and globally for aerial firefighting (such as 10 Tanker Air Carrier), private aerial refueling and contract missions (such as Omega Air), and humanitarian work (such as Orbis International's flying eye hospital).

Manufacturing

Where It's Built

Final assembly of the McDonnell Douglas DC-10 took place at the company's plant in Long Beach, California. Major structural and systems responsibilities were distributed among key industrial partners and aerostructures suppliers. Most notably, the Convair Division of General Dynamics in San Diego, California, manufactured the complete fuselage sections and cargo doors for the DC-10 program. Wings, empennage structures, and final systems integration were managed by McDonnell Douglas, while specialized subsystems—such as avionics, flight control actuators, and auxiliary power units—were sourced from tier-one aerospace vendors including Honeywell, Collins Radio, and Garrett AiResearch. Specific, aggregated total development costs for the DC-10 program were not formally and precisely published as a standalone public figure by McDonnell Douglas, though historical analyses note that the heavy financial outlay required for the wide-body trijet development significantly strained the company's liquidity during the late 1960s.

Notable Operators

American AirlinesUnited AirlinesNorthwest AirlinesFedEx ExpressContinental Airlines

Watch

McDonnell Douglas DC-10 In Action

Biman Bangladesh DC-10 AMAZING SOUND Take Off from Birmingham (BHX)

McDonnell Douglas DC-10 Promo Film - 1970

Safety Record

Notable Safety History

The safety record of the McDonnell Douglas DC-10 was scrutinized following several high-profile accidents investigated by the National Transportation Safety Board (NTSB) and other international authorities, which resulted in major engineering redesigns and mandatory regulatory directives.

In June 1972, American Airlines Flight 96 experienced an explosive decompression in flight when a lower aft cargo door detached over Windsor, Ontario. The NTSB investigation determined that the outward-opening cargo door's electrical actuator and latching mechanism allowed the door to appear locked externally while internal latches were not fully engaged, compounded by floor-beam vulnerability during cabin depressurization. Although safety recommendations were formulated, mandatory design modifications were not broadly enforced at that time. The issue recurred catastrophically in March 1974 during Turkish Airlines Flight 981, where identical cargo door failure resulted in loss of control and a fatal crash near Paris. Following this second accident, the Federal Aviation Administration (FAA) issued sweeping Airworthiness Directives (ADs) making cargo door locking modifications, vent doors, and structural cabin-floor venting mandatory across the global DC-10 fleet.

On May 25, 1979, American Airlines Flight 191 crashed shortly after takeoff from Chicago O'Hare International Airport, resulting in the loss of all on board. The NTSB investigation concluded that the structural failure and separation of the left wing's number one engine pylon assembly during takeoff was precipitated by improper maintenance procedures—specifically the use of unauthorized forklift techniques by airline maintenance crews that fractured the pylon mounting structure. The dynamic separation severed hydraulic lines and electrical circuits, causing an uncommanded retraction of the left wing outboard leading-edge slats, asymmetrical stall, and loss of the stall warning system. In response, the FAA temporarily grounded all DC-10s worldwide, ordered fleet-wide inspections of engine pylons and mounting structures, and subsequently tightened maintenance protocol regulations and structural inspection intervals.

Covers officially investigated accidents only, per aviation safety authorities (NTSB, FAA, EASA, AAIB or equivalent).

Sources & Further Reading