This is I-821, a Restricted War Department Training Film about the 50-hour maintenance performed on the Consolidated B-24 Liberator’s fuel and oil systems. It was produced by The Signal Corps in collaboration with The Army Air Forces. The B-24 was an American heavy bomber produced between 1940-1945. The film opens with shirtless men getting a lung exam, a track meet, and a diagram of the heart’s pumping system (:22-1:00). A diagram of the B-24 shows the 12 self-sealing fuel cells, the auxiliary fuel cells, fuel transfer unit, fuel pumps, and the shut-off valves, (1:02-1:35). Men are on scaffolding working on the plane (1:36-2:00). Every 50 hours, the carburetor screen is removed, cleaned, and replaced (2:01-2:35). The throttle shaft bearings are oiled (2:36-2:50) and the main fuel strainer is removed, cleaned, and replaced (2:51-3:55). The fuel line is inspected for leaks by first turning on various switches in the cockpit, shown up close. The hose clamps are checked, as is a visual check of the hose (3:56-5:04). More switches are turned to inspect the primer at the manifold, oil dilution, and fuel selector (5:05-6:15). Clearance tests are performed on the bucket wheel and the cooling cap reset (6:16-7:30). The entire supercharger is checked, including the regulator (7:31-8:45). The intercooler is checked as more switches in the cockpit are shown (8:46-9:15). For the oil system, check the oil cooler, air duct, oil supply tank, supporting straps, decoy line, and vent lines (9:16-10:30). The oil screen is removed, cleaned, and replaced, and the poppet valve checked (10:31-11:48). The inspection is recorded and the propellers all turned on to end the film (11:49-12:13).

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This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com