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