Vintage 1960s Frontier Airlines Boeing 727 Technical Manuals Lot of Two

Description

Lot of Two 1960's Vintage Frontier Airlines Technical Manuals on the Boeing 727-200 Aircraft.  These are from the original Frontier Airlines that operated between 1950-1986.  One manual is about the 727 Panel Descriptions including Call Buttons, Breaker Switches, Engine Bleed Switch, Oxygen Switches and more.  The title page has come loose from it's staple and is attached with a paper clip.  Also included is a Boeing 727-200 Manual with principal dimensions, towing loads, pressurization controls, diagrams of air conditioning and passenger cabins, negative pressure relief valve and more.