National Airlines (1934–1980)
Fleet
When National Airlines was acquired by Pan Am in 1980, the fleet consisted of 43 Boeing 727 aircraft (19 of the original series 100 model and 24 of the stretched series 200 variant), as well as 16 McDonnell Douglas DC-10 airliners (11 of the series 10 model used in domestic service and five of the intercontinental series 30 model used for service to Europe).

National Airlines (1934–1980)

Section Title: Fleet
Table Section Text: When National Airlines was acquired by Pan Am in 1980, the fleet consisted of 43 Boeing 727 aircraft (19 of the original series 100 model and 24 of the stretched series 200 variant), as well as 16 McDonnell Douglas DC-10 airliners (11 of the series 10 model used in domestic service and five of the intercontinental series 30 model used for service to Europe).

Aircraft	Introduced	Retired

Boeing 727 (includes B727-100 and stretched B727-200)	1964	1980

Boeing 747-100	1970	1976

Convair CV-340/440	1953

Curtiss C-46 Commando

Douglas DC-2

Douglas DC-4	1947

Douglas DC-6	1947

Douglas DC-7	1953	1964

Douglas DC-8 (includes stretched Super DC-8-61)	1960	1975

Lockheed Model 18 Lodestar	1940	1956

Lockheed L-188 Electra	1959	1968

Lockheed L-1049 Super Constellation	1957

Lockheed Model 10 Electra	1937

McDonnell Douglas DC-10 (includes DC-10-10 and DC-10-30)	1971	1980

Ryan ST	1934

Sikorsky S-55 (Helicopter)	1953	1954

Stinson Trimotor	1935

Sentence(s)

In 1959 the Lockheed L-188 Electra was introduced into the fleet.

final_sentence: In 1959 the Lockheed L-188 Electra was introduced into the fleet.