Airworthiness directives › 2023-01-08
AD 2023-01-08 Airworthiness Directives; Continental Aerospace Technologies GmbH Reciprocating Engines
Makes named: continental, thielert, technify. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Continental Aerospace Technologies GmbH (Type Certificate previously held by Technify Motors GmbH and Thielert Aircraft Engines GmbH) TAE 125-02-99 and TAE 125-02-114 model reciprocating engines with an engine serial number (S/N) identified in Models Affected, Continental Aerospace Technologies GmbH Service Bulletin (SB) CG 125-1027 P1, Revision 1, dated May 28, 2021.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) For Group 1 and Group 2 engines, before exceeding the applicable compliance time in Table 1 to paragraph (g)(1) of this AD, remove all main bearing studs from service if one or more main bearing studs with part number (P/N) 05-7211-K009801 and batch number B180703/1, B184216/1, B184216/2, or B191277/1 are installed on the engine and replace with parts eligible for installation in accordance with Instructions, paragraphs 4.2 through 4.2.17 of Continental Aerospace Technologies GmbH Repair Instruction RI-05-0017-04, Revision 4, dated April 1, 2021 (Continental Aerospace Technologies GmbH RI-05-0017-04, Revision 4). Table 1 to Paragraph ( g )(1)—Main Bearing Stud Replacement Group Flight hours (FHs) since new Compliance time 1 100 FHs or less Before exceeding 115 FHs since new, or during the next scheduled maintenance, whichever occurs first after the effective date of this AD. 1 More than 100 FHs Before exceeding 15 FHs from the effective date of this AD, or during the next scheduled maintenance, whichever occurs first after the effective date of this AD. 2 100 FHs or less Before exceeding 200 FHs since new, or during the next scheduled maintenance whichever occurs first after the effective date of this AD. 2 More than 100 FHs Before exceeding 100 FHs from the effective date of this AD, or during the next scheduled maintenance, whichever occurs first after the effective date of this AD. Note 1 to paragraph (g)(1): FHs since new indicated in Table 1 to paragraph (g)(1) of this AD are FHs accumulated by the engine since first installation on an airplane, on the effective date of this AD. (2) For engines not installed on an airplane as of the effective date of this AD, before further flight, remove all main bearing studs if one or more main bearing studs with P/N 05-7211-K009801 and batch number B180703/1, B184216/1, B184216/2, or B191277/1 are installed on the engine and replace with parts eligible for installation in accordance with Instructions, paragraphs 4.2 through 4.2.17 of Continental Aerospace Technologies GmbH RI-05-0017-04, Revision 4.
Unsafe condition
This AD was prompted by manufacturer reports of fractured main bearing studs. The FAA is issuing this AD to prevent failure of the main bearing stud. The unsafe condition, if not addressed, could result in engine in-flight shutdown and forced landing, damage to the airplane, and injury to the occupants.
Affected ADs
None.
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