FFG 7类咨询NR 04-93 MK 36诱饵发射系统（DLS）电源断路器带辅助开关REF / A / RMG / NCSL PORTSMOUTH / 121505ZFEB93 / - / NOTAL // REF / B / RMG / NSWC ORD Louisville / 081530ZMAR93/ - / NOTAL // NARR / REF A确定了FFG 7类MK 36诱饵发射系统安全问题。REF B要求Navsea解析配置控制问题，该配置控制问题控制发射器一个和二，为Poc / A的电源。/ / a。FINAZZO / CIV / PMS330TS2 /华盛顿特区/电话：DSN 332-1305 / TEL：（703）602-1305 // RMKS / 1。该咨询提供了验证安装正确断路器，如果需要更换步骤的安装指南，以及MK 36 DLS发射器的临时安全维护程序一及二。2.背景。REF A确定了MK 36 DLS安全问题，这可能导致无意的诱饵发射。一些FFG 7级船舶没有安装发射器的正确断路器和两个。适当的断路器不仅为每个发射器提供MK 160 PWR电源，还包含内部辅助开关，当断路器处于OFF位置时，内部辅助开关打开28VDC备用电池电路。在没有内部辅助交换机的情况下安装断路器会在执行系统维护时创建无意发射的可能性。根据要求的REF B，提供以下指导以识别和纠正问题。 3. ACTION. A. EXAMINE SUSPECT CIRCUIT BREAKERS FOR LAUNCHERS ONE AND TWO IN POWER PANEL 01-183-2 LOCATED IN AIRNAV/ECM ROOM (01-180-0-Q). PART NUMBER FOR CORRECT BREAKER IS CAT. NO. ETN2750-10, WHICH IS STAMPED ON THE BREAKER. IF UNABLE TO DETERMINE P/N FOR BREAKERS, CHECK THE MK 160 METER FOR 28V BATTERY CIRCUIT WITH BREAKER IN OFF POSITION. METER SHOULD READ ZERO VOLTS WITH CORRECT BREAKER INSTALLED. B. IF INCORRECT BREAKER IS INSTALLED, PROCURE CORRECT BREAKER LISTED ABOVE AND 30 FEET OF TYPE F3 CABLE. THE ORDERING DATA FOR THE CIRCUIT BREAKER WITH AN AUXILIARY SWITCH IS AQB-A101, 15A ELEMENT, APL NO. 14032175, NSN 5925-01-139-3139. WITH 28VDC AND 440VAC POWER SECURED AND PROPERLY TAGGED-OUT, REMOVE EXISTING CIRCUIT BREAKER AND INSERT CORRECT BREAKER WITH AUXILIARY SWITCH. REMOVE AND DISCARD 2-CONDUCTOR CABLE RUNNING FROM BREAKER TO MK 160 POWER SUPPLY. RUN NEW TYPE F-3 CABLE FROM BREAKER TO MK 160 POWER SUPPLY. USE TWO CONDUCTORS TO RECONNECT TWO POLES OF THE BREAKER TO THE MK 160 440VAC SUPPLY (THIRD POLE OF THE BREAKER IS NOT USED). USE THE TWO REMAINING CONDUCTORS TO CONNECT THE AUXILIARY SWITCH (NORMALLY OPEN CONTACTS) OF THE CIRCUIT BREAKER TO THE 28VDC BATTERY CIRCUIT WITHIN THE MK 160 POWER SUPPLY. ONE SIDE OF NORMALLY OPEN CONTACTS OF AUXILIARY SWITCH SHOULD BE CONNECTED TO THE POSITIVE SIDE OF THE BATTERY, COMMON SIDE OF AUXILIARY SWITCH SHOULD BE CONNECTED TO TB4-7 OF MK 160 POWER SUPPLY. UNUSED WIRE FROM AUXILIARY SWITCH SHOULD BE SECURED INSIDE POWER PANEL. C. IF POWER MUST BE SECURED TO PERFORM MAINTENANCE ON LAUNCHERS 1 OR 2 PRIOR TO INSTALLATION OF CORRECT BREAKER, ENSURE BATTERY LEAD IS DISCONNECTED IN ADDITION TO DISABLING THE 440VAC POWER VIA THE EXISTING BREAKER. 4. FOR COMAVSURFLANT/COMNAVSURFPAC - RECOMMEND FFG 7 CLASS SHIPS BE TASKED TO COMPLY WITH PARA 3 ACTION AT EARLIEST OPPORTUNITY. REQUEST ALL SHIPS REPORT FINDINGS AND, IF REQUIRED, COMPLETION OF CORRECTIVE ACTION TO NAVSEA PMS330, INFO TYCOM, NSWC ORDSTA LOUISVILLE (CODE 90F1) AND LBNSY (CODE 270.2). INSTALLATION OF CORRECT BREAKER WILL BE VERIFIED AS PART OF FUTURE INSTALLATIONS OF SHIPALT FFG7-176K, MK 36 DLS EXPANSION. 5. THIS ADVISORY HAS NO IMPACT ON EOSS, PMS, CMP OR TECHNICAL DOCUMENTATION. IT WILL BE CANCELLED WHEN ALL FFG 7 CLASS SHIPS HAVE REPORTED COMPLETION OF PARA 3 GUIDANCE.//
CG-47.