B757 / B767 Original Aircraft Reference Guide United Airlines Maintenance Operations Training Manual consists of 2 illustrated Volumes. 

Volume I is tabbed: Dimensions & Areas, Air Conditioning, Autopilot, Communications, Electrical Power, Equipment Furnishings, Fire Protection, Flight Controls, Fuel, Hydraulic Power, and Ice & Rain Protection, Instruments & Recordings, Landing Gear, Lights, Navigation, and Oxygen.

Volume 2: Contains Pneumatics, Water/ Waste, APU, Doors, Windows, JT9 Power Plant General, PW2000 Power Plant General, PW4000 Power Plant General, JT9 Engine General, PW2000 Engine General, PW4000 Engine General, JT9 Engine General, PW2000 Engine Fuel, PW4000 Engine Fuel, JT9 Engine Ignition, PW2000 Engine Ignition, PW4000 Engine Ignition, JT9 Engine Air, PW2000 Engine Air, PW4000 Engine Air, JT Engine Control, PW2000 Engine Control, PW4000 Engine Control,  JT9 Engine Indicating, PW2000 Engine Indicating, PW4000 Engine Indicating, JT9 Engine Exhaust, PW2000 Engine Exhaust, PW4000 Engine Exhaust, JT9 Engine Oil, PW2000 Engine Oil, PW4000 Engine Oil, JT9 Engine Starting, PW2000 Engine Starting, and PW4000 Engine Starting.

Manuals are in great condition.  For the most part, only used during training classes.  There may be a little bit of highlighting and/or notes but did not see any as I was shuffling through the pages.

I will be selling all my manuals, so please look at my other ebay items for sale.  We do combine shipping.

Thanks,