Stabilizers – Horizontal Stabilizer Attachment Bolts – Inspection /; Clearance Check / Modification
Superseded. Comply with 2024-0064R1, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2020-0132R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform detailed visual inspections of the horizontal stabilizer attachment area within 5 flight hours after the effective date and repeat every 5 flight hours. Torque measurements and inspections of bolts and fittings must be done within 55 flight hours and repeated at specified intervals. Any findings of damage or cracks require immediate corrective actions, including replacement or modification as detailed in the Emergency Alert Service Bulletin 05A020 Revision 6.
Summary
EASA Airworthiness Directive 2022-0099 is an airworthiness directive addressing Airbus Helicopters EC 175 B models. It focuses on inspection, clearance checks, and modifications related to the horizontal stabilizer attachment bolts and fittings to prevent potential in-flight loss of the horizontal stabilizer. The directive applies to all EC 175 B helicopters except those modified with AH mod 9U9A05341.
What changed
This directive supersedes EASA AD 2020-0132R1 and introduces a reduced inspection interval for the affected stabilizers' attachment area. It also mandates modification of the visible part of the horizontal stabilizer spar to improve crack detectability. The pre-modification requirements for Group 1 helicopters have been removed as all have been modified accordingly.
Why it matters
This directive is critical for aviation professionals to prevent potential loss of control due to horizontal stabilizer failure. It impacts operators and maintenance teams by requiring more frequent inspections and specific modifications to ensure continued airworthiness and flight safety. Compliance helps avoid in-flight structural failures and associated risks.
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