MCSs of man repairing panel of test equipment, welding wires on back side of panel. Shots of electricians wiring control panel, of men wiring leads onto terminal. CU of man tuning transmitter-receiver radio unit. CU of middle-aged man, TILT DOWN to CU of speedometer dial of airplane he's assembling. CUs of man's hands adjusting auto-gyro compass. MS of electricians wiring interior of commercial transport plane. CS of radio panel in plane under contruction, TILT DOWN to electrician wiring panel. LAMCS of of electrician wiring plane. Shot of men testing radio equipment in front of almost completed Douglas DC-4. MS of man testing radio equipment. MSL of men at work on aircraft parts, TILT UP to general view of interior of aircraft factory.