# SDR 2026FA0000414

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 2026
- Submitted: May 20, 2026
- Operation: General aviation
- Make and model: Airbus A300*
- Engine: Rroyce TRENTXWB97
- System (JASC): [7260 · Turbine Engine Accessory Drive](https://openairdocs.org/jasc/7260)
- Part: Seal
- Part number: 90C24604
- Part serial: EE361628
- Condition: Wrong Part
- Component: Gearbox
- Component part number: 94500D07
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000414

## Discrepancy

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

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