TM 10-1670-287-23&P 0001 00 0001 00-4 LIST OF ACRONYMS AND ABBREVIATIONS – CONTINUED ft. Feet GPM Ground Precautionary Message in. Inches KIAS Knots Indicated Air Speed Ltrs Liters LG Long Lbs Pounds MAC Maintenance Allocation Chart MAM Maintenance Advisory Message MSL Mean Sea Level MTOE    Modified Table of Organization and Equipment MTG Mounting MWO     Modification Work Order NF National Fine (Thread) NIIN National Item Identification Number NLT No Later Than No. Number NSN National Stock Number OD Olive Drab oz. Ounces PMCS    Preventive Maintenance Checks and Services PQDR    Product Quality Deficiency Report psi Pounds Per Square Inch RAPPS   Ram Air Personnel Parachute System RFI Ready For Issue RPSTL   Repair Parts and Special Tools List SDR   Supply Discrepancy Report