Hayes Hour Glass Airbourne Equipment For B-29, B-50, C-119 Instructions

Hayes Aircraft Corporation Instructions (Service Bulletin)Hour Glass Airborne Equipment For USAF Series B-29, B-50, C-119 Aircraft.  Dated 1953.  This Service Bulletin provides instructions for the installation, operation and maintenance of the Hour Glass Airborne Equipment and is broken down into 3 sections.  Section 1.  Modification of USAF series B-29, B-50, C-119 Aircraft For Hour Glass Airborne Equipment.  Section 2. Supplemental Flight Operating Instructions and Weight and Balance Data.  Section 3.  Service Instructions For Hour Glass Airborne Equipment - covers Description, Ground Handling and Service Tools, Inspection and Lubrication, Maintenance, Group Assembly Parts List