The High and the Mighty
From The Internet Movie Plane Database
John Wayne (Dan Roman)
Claire Trevor (May Holst)
Laraine Day (Lydia Rice)
Robert Stack (John Sullivan)
Jan Sterling (Sally McKee)
Phil Harris (Ed Joseph)
A commercial airliner suffers a mechanical problem during a flight. The pilot loses his nerve leaving it to his washed up co-pilot to save the day and land the troubled flight safely.
Also partially visible in the first image are a Douglas DC-3 (tail) and a Curtiss C-46 (nose).
The DC-4 wear a of fictional TOPAC-Trans Orient Pacific Airlines Company, probably based upon an ex United Airlines livery.