10% may be applied to equipment in phased maintenance aircraft. The five different types of life rafts used in naval aviation are the LR-1 and LRU-7/P, which are one-man rafts; the LRU-12/A, which is a four-man raft; the LRU-13/A, which is a seven- man raft; the LRU-14 series, which is a 12-man raft, and the LRU-15/A, which is a 20-man raft. You may be required to work on only one or you may work on all of them. All require the same three inspections—preflight, special, and calendar/phase. The preflight inspection is performed on fuselage-installed life rafts before the first flight of the day. This inspection is done by line personnel (plane captain or delegated aircrewman) who have been designated by the line division officer, instructed, and found qualified by the aviators equipment branch. The special inspection is performed on fuselage-installed life rafts every 30 days. This inspection is made at the organizational level of maintenance by personnel assigned to the aviators equipment branch. Upon completion of the inspection, the date of inspection and inspector’s signature are entered in the inspections section of the Aviation Crew Systems History Card. To perform a preflight/special inspection, visually inspect for the following: 1. 2. 3. 4. 5. 6. Fabric for cuts, tears, deterioration, and abrasion Seams for proper adhesion or stitching Straps and handles for security and wear Any other parts for wear, damage, and security All hardware for security of attachment, corrosion, damage, wear, and, if ap- plicable, ease of operation Life raft retaining line for proper stowage CAUTION DO NOT OPEN RAFT ACCESS DOORS, RSSK KITS, OR ANY SEALED OR SAFETY-WIRED PORTION OF THE LIFE RAFT FOR THIS INSPEC- TION. Subject each life raft to the calendar/phase inspection before you place it in service, or if it is an aircraft inventory item at the time of the aircraft acceptance inspection. Thereafter, the calendar/phase inspection interval coincides with the aircraft inspection cycle in which it is installed. See the applicable Planned Maintenance System (PMS) publications for specific intervals. In no case will the interval exceed 231 days except that the LR-1 (RALSA) inspection is not to exceed 453 days. Unless operational requirements demand otherwise, the life raft calendar/phase inspection is performed at the intermediate level of maintenance or above. The acceptance/calendar/phase inspection consists of the following major tasks (to be performed in the order listed): 1. 2. 3. 4. 5. 6. 7. 8. Container/case inspection Functional test (if required) Pull cable proof load test (if required) Visual Inflation assembly inspection Leakage Records updating Repacking Details are listed in NAVAIR 13-1-6.1. A functional test and pull cable proof load test are performed prior to placing a raft in service or during an aircraft acceptance inspection, and each fourth inspection cycle thereafter. You must make a leakage test at each inspection cycle. If the inspection indicates any damage beyond capability of maintenance, you must forward the entire assembly to supply. DETERMINATION OF REPAIRABILITY Life rafts are considered beyond repair for any of the following reasons: 1. 2. 3. 4. 5. 6. Porous fabric areas on tubes Split or open tube seams Leakage test failure resulting from other than a cut, tear, or puncture Damaged or malfunctioning inlet valve, manifold, or oral inflation tube Damaged or malfunctioning topping-off valve that cannot be corrected by replacement of the topping-off valve opening insert Multiplace rafts (leaky bulkheads) FUNCTIONAL TEST Before functionally testing a life raft, you should make sure you have enough area to inflate 6 - 2