What was found
DURING THE DISASSEMBLY OF RR XWB-97K EGB EG0527, THE PRESENCE OF A DYNAMIC SEAL P/N NOT LISTED IN THE APPROVED DATA FOR XWB 97K AT POSITION 14-320 WAS OBSERVED. THE MOUNTED P/N IS: 90C24604 "JOINT ASSEMBLY, ROTATING EE361628-1". THE P/NS SPECIFIED IN RR XWB-97K APPLICABLE MAINTENANCE DOCUMENTATION ARE: 90C31100 AND 90C24608 (AS AN ALTERNATIVE). THE P/N 90C24604 IS AUTHORIZED IN RR XWB-84K APPLICABLE MAINTENANCE DOCUMENTATION DOCUMENTATION. IN JUNE 2017, THE EGB WAS RELEASED UNDER PAR 21G: THE P/N COMPLIED WITH RR XWB-97K APPROVED DATA. IN OCTOBER 2017, FOLLOWING A 0-HOUR RETURN FOR UNRELATED REASONS, THE EGB WAS RELEASED A SECOND TIME UNDER PAR 21G: THE P/N COMPLIED WITH RR XWB-97K APPROVED DATA. THIS IS THE FIRST VISIT OF THIS EGB TO STS MRO SHOP. INVESTIGATIONS SHOWED THAT ALL 7 DYNAMIC SEALS WERE REPLACED SINCE 21G PRODUCTION RELEASE. THE ONLY ANOMALY IS AT POSITION 14-320. THE COMPONENT WAS DELIVERED TO R & R AS A SPARE ON 2014-12-08 UNDER BL 80097112. THE COMPONENT WAS DISASSEMBLED, AND WILL ONLY BE BE RELEASE IF COMPLIANT WITH APPROVED DESIGN DATA. - THE INFORMATION CONTAINED IN THIS REPORT WILL BE COMMUNICATED TO THE CUSTOMER - THE CUSTOMER WAS ASKED TO INFORM THE OPERATOR AIRLINE