Matching Pairs AVIATION ABBREVIATIONSOnline version Match the abbreviation with the correct meaning. by Steven Rafael Torres Orozco 1 AD 2 SRM 3 S/N 4 P.S.I 5 P/N 6 LB 7 SL 8 SB 9 FT SERIAL NUMBER PART NUMBER STRUCTURAL REPAIR MANUAL SERVICE BULLETIN PRESSURE SQUARE INCH POUND FOOT AIRWORTHINESS DIRECTIVE SERVICE LETTER