# Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
> **Rule** · Final rule; request for comments. · Published 2024-04-09 · Effective 2024-04-15 · 89 FR 24691
## Document
- **Document number:** 2024-07433
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce Deutschland Ltd & Co KG
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 89 FR 24691
- **Publication date:** 2024-04-09
- **Effective date:** 2024-04-15
- **FAA docket:** Docket No. FAA-2024-0993
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model RB211-524H-36 and RB211-524H-T-36 engines. This AD was prompted by reports of engine surges and a subsequent investigation which found that the surges may have been caused by material loss on the high-pressure compressor (HPC) stage 1 and stage 2 rotor path liners. This AD requires borescope inspections (BSIs) of the HPC stage 1 and stage 2 rotor path liners for material loss, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/04/09/2024-07433/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-engines)
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