Try these with your 'reference number' or 'locator'
Apollo/Galileo:
http://www.viewtrip.com
Sabre/Abacus:
http://www.virtuallythere.com
Worldspan:
http://www.mytripandmore.com
Amadeus:
http://www.checkmytrip.com
Some will not work: - others may and show the AA PNR and the QF PNR