# Airworthiness Directives; Continental Aerospace Technologies GmbH Engines
> **Rule** · Final rule; request for comments. · Published 2025-10-15 · Effective 2025-10-30 · 90 FR 48251
## Document
- **Document number:** 2025-19555
- **Category:** airworthiness
- **Manufacturer:** Continental Aerospace Technologies GmbH
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 90 FR 48251
- **Publication date:** 2025-10-15
- **Effective date:** 2025-10-30
- **FAA docket:** Docket No. FAA-2025-3432
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Continental Aerospace Technologies GmbH (Continental) Model TAE 125-02- 125 engines. This AD was prompted by multiple reports of cracks in the cylinder heads, which can cause engine coolant to leak into the combustion chamber. This AD requires a one-time inspection of the engine coolant for contamination and, depending on the inspection results, replacement of the coolant and replacement of the cylinder heads. This AD also prohibits installing a cylinder head on any engine unless it is a serviceable part. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/10/15/2025-19555/airworthiness-directives-continental-aerospace-technologies-gmbh-engines)
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