交通部民用航空局

發布日期

2023/04/10

適用性說明

CFM International, S.A. (CFM) model turbofan engines identified in Table 1 toparagraph (c) of this AD with an installed high-pressure turbine (HPT) inner stationary seal, partnumber (P/N) 1808M56G01, that has a serial number (S/N) listed in Table 1 of CFM ServiceBulletin (SB) CFM56–5B S/B 72–0952, Revision 02, dated August 10, 2022 (CFM SB CFM56–5BS/B 72–0952); Table 1 of CFM SB CFM56–5C S/B 72–0796, Revision 02, dated August 10, 2022(CFM SB CFM56–5C S/B 72–0796); or Table 1 of CFM SB CFM56–7B S/B 72–1054, Revision 02,dated August 10, 2022 (CFM SB CFM56–7B S/B 72–1054). This AD does not apply to affected CFMCFM56–5B, CFM56–5C, and CFM56–7B model turbofan engines with the affected HPT innerstationary seal installed if the seal has been repaired as specified in CFM56–5B Engine ShopManual (ESM), 72–41–03, REPAIR 003; CFM56–5C ESM, 72–41–03, REPAIR 003; or CFM56–7B ESM, 72–41–03, REPAIR 003, after December 31, 2012.

型別

CFM International - CFM56 turbofan engines

民航局AD編號

CAA-2023-04-004

原發布國

FAA

原AD編號

2023-05-05

生效日期

2023/05/10

主旨摘要

This AD requires removal, inspection, and replacement of the affected HPT inner stationary seal and, depending on the findings, replacement of the rotating air HPT front seal, HPT rotor blades, and No. 3 ball bearing, and also revises the applicability to add CFM CFM56–5C model turbofan engines.

參考資訊（版本/ATA/SB）

This AD replaces AD 2021–10–09(CAA-2021-05-007).

存檔序號

112-04-004

專業分項

Powerplant

產品類別

Engine

備註

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