MC1-1C/MC1-1D TROOP BACK PARACHUTE ASSEMBLY PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INTRODUCTION

TM 10-1670-277-23&P 0005 00 MC1-1C/MC1-1D TROOP BACK PARACHUTE ASSEMBLY PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INTRODUCTION 0005 00-1/(2 Blank) GENERAL The following describe PMCS procedures on the unit and direct support levels. The purpose of PMCS is to ensure the 28-Foot Diameter Cargo Extraction parachute is in proper operating condition, and ready for its primary use. SCOPE The following work packages (WP 0007 00 through WP 0052 00) contain maintenance procedures that are the responsibility of the specified technician, as authorized by the Maintenance Allocation Chart (MAC), and the Source, Maintenance, and Recoverability (SMR) coded items that are identified in the Repair Parts and Special Tools List (RPSTL). MAINTENANCE FUNCTIONS/PROCEDURES Each of the mentioned work packages above identifies as maintenance function specified in the MAC. All maintenance procedures required to complete a maintenance function are identified under THIS TASK COVERS: in the order in which the work is most logically accomplished. PARACHUTE REPACK INTERVAL The 28-Foot Diameter Cargo extraction parachute will be repacked at a scheduled interval to ensure airworthiness. When necessitated by climate/storage/use condition, the local airdrop equipment maintenance officer may require more frequent repack intervals. In this regard, a major concern would be rapid fluctuations of temperature (fluctuations around 32 degrees Fahrenheit, freezing point) sustained high or low temperature, or high humidity and heavily polluted atmosphere. The 28-Foot Diameter Cargo Extraction parachute will be repacked at a 365-day interval. However, the repack cycle of the 28-Foot Diameter, Cargo Extraction Parachutes stored in Depots and facilities that maintain contingency stocks of 28-Foot Diameter Extraction Parachute, that are specifically identified as PACKED FOR CONTINGENCY and stored separately from normal parachute stock, will be repacked at a 144-month interval. This is only to occur providing the storage conditions are IAW this TM and TM 10-1670-201-23. DROP TESTING CRITERIA Drop-testing the 28-Foot Diameter Cargo Extraction parachute consists of physically airdropping an item from an aircraft in flight. The drop-test is used as a means of proving the serviceability of an item or checking parachute rigger proficiency, and will only be performed under the supervision of qualified parachute rigger personnel who satisfy the supervisory requirements outlined in AR 750-32. Drop-testing will usually be conducted by an activity responsible for the inspection and maintenance of airdrop equipment, which includes either parachute packing or airdrop load rigging. The criteria required to accomplish a drop test is as follows: 1. During the drop-test of any type parachute, the deployment of the parachute will be thoroughly monitored and observed to detect any indication of malfunction or defect. Any defect or malfunction detected in a drop test will be annotated in the log record book using procedures outlined in WP 0003 00, SERVICE UPON RECEIPT. 2. Any type of airdrop equipment that indicates evidence of malfunction/defect during, or after, a drop- test will be disposed of as prescribed in WP 0009 00, INSPECTION. 3. Airdrop equipment that does not reflect evidence of malfunction or defect upon completion of a drop- test will be administered a technical/rigger-type inspection as outlined in WP 0009 00, INSPECTION. If serviceable, the item(s) may then remain in use. END OF WORK PACKAGE