7-001 REV. B POSSIBLE INCORRECT TEE-FITTING ON THE NGS SYSTEM. SERVICE LETTER RECOMMENDED 23-SEP-2010 SL 737-SL-47-002 INCORRECT MATING TEETH ON NGS ELECTRICAL CONNECTIONS. SERVICE LETTER RECOMMENDED I6-FEB-2010 SL 737-SL-47-002 REV. A INCORRECT MATING TEETH ON NGS ELECTRICAL CONNECTIONS. SERVICE LETTER INFORMATIO