Time Limits / Maintenance Checks — Airworthiness Limitations Section — Amendment
Superseded. Comply with 2026-0123, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2022-0008
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must replace components before exceeding life limits and perform all maintenance tasks within specified intervals as detailed in the updated ALS starting from 6 February 2023. Any discrepancies found during inspections must be corrected before the next flight. Additionally, the approved Aircraft Maintenance Programme must be revised within 12 months of the effective date to incorporate the new instructions and limitations.
Summary
EASA Airworthiness Directive 2023-0021 is an amendment addressing time limits and maintenance checks for GE Aviation Czech H75, H80, and H85 engine models installed on various aircraft including the Aircraft Industries L410-UVP-E20 and L410-NG, Do 28 series, S-2R series, and DHC-3 Otter aeroplanes. This directive mandates compliance with updated Airworthiness Limitations Section (ALS) tasks and life limits to ensure continued airworthiness. It applies to all build configurations and serial numbers of the affected engines.
What changed
EASA Airworthiness Directive 2023-0021 supersedes the previous AD 2022-0008 and introduces new and/or more restrictive maintenance tasks and life limits as published in GE Aviation Czech's EMM Revision 25. It also incorporates updated Alert Service Bulletins providing instructions for determining accumulated life of certain propeller shafts. The directive requires operators to revise their approved Aircraft Maintenance Programme accordingly.
Why it matters
This directive is critical for aviation professionals as it ensures that mandatory maintenance tasks and life limits are up to date, preventing unsafe conditions caused by component failures. Operators and maintenance organizations must comply to maintain aircraft airworthiness and regulatory compliance under EU regulations. Failure to adhere could lead to grounding of aircraft or unsafe operations.
Get the next one by email
New ADs and bulletins for these 6 aircraft types, summarized like this page, every Monday.