船舶系统ISE咨询号码。059-82 LPD-1级船尾门紧急索具载体费城PA MSG 212142Z 5月82日参考：A. Shipalt LPD-405，Rev 1，Stern门紧急索具B. Navsea DWG LPD 2-122-5500985，Stern门紧急钻机 -Ging修改C. Navshipyd Philadelphia PA 061344Z 5月82日（NOTAL）1.摘要：本消息的目的是建议目前安装在USS Raleigh（LPD-1）和USS温哥华（LPD-2）上安装的紧急船尾栅格索具装置，每个Shipalt LPD-405，由于与右舷侧使用的一个滑轮相关的边缘安全性因子，可能发生故障。提供了推荐的修改。结束摘要。2.发出参考A，以修改现有的LPD类船尾门紧急索具。参考文献B由Supship San Diego开发，用于在USS温哥华（LPD-2）上安装参考A.此外，Navshipyd Philadelphia PA最近使用参考B用于在USS Raleigh（LPD-1）上完成参考A.3.参考C注意到每个参考文献B完成船舶B的问题。在参考文献B的View El 17-C中显示的新索具括号具有基本更大的扭转载荷。参考C进一步注意到那瓦希·费城成年人正在开发一个方法，参考文献B将在USS Lasalle（AGF-3）上完成，目前正在纳沃·费城在Navshipyd Philadelphia开发的Mod，这将大大加强滑轮支架，以便它将是 ABLE TO HANDLE THE LOADING SAFELY. 4. NAVSSES DISCUSSED THE ABOVE PROBLEM WITH SUPSHIP SAN DIEGO DESIGN PERSONNEL AND IT WAS AGREED THAT THE BEST SOLUTION WOULD BE TO CHANGE THE STARBOARD RIGGING ARRANGEMENT SO THAT IT IS SIMILAR TO THE PORT ARRANGEMENT (SEE DETAIL 8-C ON REFERENCE B). NOTE, THE PORT ARRANGEMENT UTILIZES A SNATCH BLOCK VS A FIXED SHEAVE AND IS NOT SUBJECT TO THE TORSIONAL LOADING. THIS ALTERNATIVE FIX WAS DISCUSSED WITH NAVSHIPYD PHILADELPHIA DESIGN PERSONNEL AND THEY CONCUR WITH IT. 5. BASED ON THE ABOVE, NAVSSES RECOMMENDS THE FOLLOWING: A. AT THE FIRST OPPORTUNITY MODIFY THE STARBOARD SIDE EMER- GENCY STERN GATE RIGGING ON USS RALEIGH AND USS VANCOUVER SO THAT IT IS THE SAME AS THAT ON THE PORT SIDE (DETAIL 8-C OF REFERENCE B). B. ACCOMPLISH THIS SAME MOD ON USS LASALLE WHILE IT IS STILL IN ROH. C. UNTIL THIS MOD IS ACCOMPLISHED, EXTREME CARE SHOULD BE USED IF THE EMERGENCY STERN GATE RIGGING MUST BE UTILIZED: NO EXTERNAL LOADS (OTHER THAN THE GATE WEIGHT) SHOULD BE IMPOSED ON THE RIGGING. D. UPON ACCOMPLISHMENT OF THIS MOD, THE EMERGENCY RIGGING SHOULD BE TESTED. TESTING IS TO INCLUDE A 200 PERCENT STATIC LOAD TEST (THE GATE HORIZONTAL AND AN EXTERNAL LOAD OF APPROXIMATELY 80-90K POUNDS PLACED ON THE GATE) AND A 150 PERCENT DYNAMIC LOAD TEST (THE GATE HORIZONTAL AND AN EXTERNAL LOAD OF APPROXIMATELY 40-45K). DURING BOTH TESTS THE HYDRAULIC SYSTEM DOCKING VALVE MUST BE OPENED AND DURING THE DYNAMIC TEST APPROXIMATELY 2 FEET OF GATE TRAVEL IN EACH DIRECTION IS REQUIRED TO VERIFY OPERATION. 6. FOR NAVSEA 5142/9413: RECOMMEND APPROPRIATE ACTION BE TAKEN TO MODIFY REFERENCE B TO DOCUMENT THE ABOVE MODIFICATION. REFERENCES A AND B SHOULD ALSO BE REVISED TO INCLUDE THE TESTING REQUIREMENTS CITED IN PARAGRAPH 5.D ABOVE. THIS ADVISORY APPLICABLE TO LPD-1 AND AGF-3 CLASSES OF SHIPS.
LPD-1