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De Havilland Canada DHC-4 Caribou
The De Havilland Canada DHC-4 Caribou, also designated CV-2 and C-7, is a twin-engine STOL cargo aircraft first flown in 1958 that served extensively in Vietnam.
De Havilland Canada DHC-5 Buffalo
The De Havilland Canada DHC-5 Buffalo, designated C-8 or CV-7 by the United States, is a Canadian twin-turboprop STOL tactical transport built from 1965 to 1986.
De Havilland Canada DHC-6 Twin Otter
The De Havilland Canada DHC-6 Twin Otter is a Canadian 19-passenger twin-turboprop STOL utility aircraft, first flown in 1965, with 844 built by 1988 and production later revived.
De Havilland Canada E-9 Widget
The E-9A Widget is a US Air Force range-support aircraft, a converted Dash 8 airliner delivered in 1988 that scans the Gulf of Mexico for boats and relays missile telemetry.
De Havilland Comet
The de Havilland Comet was a British four-jet airliner, the world's first commercial jetliner, flying for BOAC from 1952 until fatigue-related crashes ended its career.
De Havilland Dove
The de Havilland Dove, known in military service as the Devon, is a British twin-engine short-haul airliner first flown in 1945, with 544 built and production lasting into the 1960s.
De Havilland Dragon Rapide
The de Havilland Dragon Rapide (DH.89) is a British twin-engine, all-wood biplane airliner that carried up to eight passengers on short-haul routes from 1934; the RAF used it as the Dominie.
De Havilland Hornet
The de Havilland Hornet (DH Hornet) was a British twin-engine, single-seat long-range fighter that first flew in July 1944 and served in the Malayan Emergency.
De Havilland Mosquito
The de Havilland Mosquito, or Wooden Wonder, was a British twin-engine multi-role combat aircraft of the Second World War, built almost entirely of wood and first flown in 1940.
De Havilland Sea Venom
The de Havilland Sea Venom was a British two-seat, all-weather carrier-based jet fighter of the 1950s, the Royal Navy's first, and saw action at Suez in 1956.
De Havilland Sea Vixen
The de Havilland Sea Vixen was a British twin-engine, twin-boom, carrier-based fleet air-defense fighter flown by the Royal Navy's Fleet Air Arm from the late 1950s to the early 1970s.
De Havilland Tiger Moth
The de Havilland Tiger Moth is a British two-seat biplane that served as the Royal Air Force's standard elementary trainer from 1931 through the Second World War.
De Havilland Vampire
The de Havilland Vampire is a British twin-boom jet fighter, first flown in 1943 and used by the Royal Air Force from 1946 into the 1970s.
De Havilland Venom
The de Havilland Venom (DH Venom) was a British jet fighter-bomber developed from the Vampire, serving the RAF from 1952 and flying in Switzerland until the mid-1980s.
De-icing
De-icing is the removal of ice, snow, or frost from aircraft surfaces before flight, usually by spraying heated glycol fluids, under the clean aircraft concept.
Deadstick landing
A deadstick landing, also written dead-stick landing, is a forced landing in which a pilot glides an aircraft to the ground after a complete loss of engine power.
Death of Dag Hammarskjöld
The death of Dag Hammarskjöld occurred in September 1961 when his plane crashed near Ndola, Northern Rhodesia (now Zambia), killing the UN Secretary-General and 14 others.
Death of Ricky Nelson
The death of Ricky Nelson occurred on December 31, 1985, when his DC-3 caught fire in flight and crashed near De Kalb, Texas, killing Nelson, his fiancée, and five band members.
Death of Stevie Ray Vaughan
The death of Stevie Ray Vaughan occurred on August 27, 1990, when a helicopter carrying the American blues guitarist crashed near Elkhorn, Wisconsin, killing all five aboard.
Decision altitude
Decision altitude (DA) is a specified altitude referenced to mean sea level at which a pilot on a vertically guided instrument approach must decide whether to continue or initiate a missed approach.
Decompression sickness
Decompression sickness, also known as the bends or caisson disease, is a condition where nitrogen bubbles form in the body after rapid pressure reduction, mainly in divers.
Deep stall
A deep stall, also known as a superstall or superstick, is a prolonged or unrecoverable stall in which the stalled wing's turbulent wake blanks the horizontal tail, leaving elevators ineffective, chiefly on T-tail aircraft.
Defence of the Reich
The Defence of the Reich (German: Reichsverteidigung) was the Luftwaffe's strategic air defense campaign over Germany and occupied Europe during World War II, opposing the Anglo-American bomber offensive.
Deicing boot
A deicing boot is an inflatable rubber membrane bonded to aircraft wing leading edges that cracks off ice when inflated, invented by William C. Geer in 1930.
Delivery drone
A delivery drone is an unmanned aircraft that carries packages, food, or medical supplies directly to customers, typically as the final leg of a logistics network, or last-mile delivery.
Delta Air Lines
Delta Air Lines is an American airline headquartered in Atlanta, Georgia, flying to more than 300 destinations on six continents with one of the world's largest fleets.
Delta Air Lines fleet
The Delta Air Lines fleet, also called the Delta fleet, is the aircraft flown by Delta Air Lines and its regional carriers, totaling 1,314 aircraft as of December 2025.
Delta Air Lines Flight 1141
Delta Air Lines Flight 1141 was a Boeing 727 that crashed on takeoff from Dallas-Fort Worth on August 31, 1988, killing 14 of the 108 people aboard.
Delta Air Lines Flight 191
Delta Air Lines Flight 191 crashed on approach to Dallas/Fort Worth on August 2, 1985, after flying into a microburst, killing 134 of the 163 aboard.
Delta Air Lines Flight 9570
Delta Air Lines Flight 9570 was a DC-9 training flight that crashed at Fort Worth, Texas, in 1972 after wake turbulence from a DC-10 killed all four aboard.