Main Rotor – Hub Strap Pins – Replacement
Superseded. Comply with 2022-0052-E, which replaces this document.
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of AB204B, AB205A-1, and AB212 helicopters must replace any affected main rotor hub strap pins before the next flight after 2021-07-09. From that date, installation of affected parts is prohibited. Maintenance procedures should be followed to ensure only serviceable parts are installed.
Summary
EASA Airworthiness Directive 2021-0165-E is an emergency directive addressing safety concerns for Leonardo S.p.A. AB204B, AB205A-1, and AB212 helicopters. It targets the main rotor hub strap pins (MRHSP) with part number 204-012-104-005 and serial numbers beginning with 'FNFS', which have shown premature failure. The directive mandates immediate replacement of these affected parts to prevent main rotor blade detachment.
What changed
This directive introduces a mandatory replacement of affected main rotor hub strap pins on specified helicopter models due to reported failures leading to potential catastrophic rotor detachment. It prohibits installation of these affected parts on any helicopter from the effective date. This is an interim safety measure pending further investigation.
Why it matters
The directive is critical for aviation professionals as it addresses a severe safety risk that could result in loss of helicopter control and fatal accidents. Operators and maintenance organizations must ensure compliance to maintain airworthiness and avoid operational disruptions. Compliance teams must track affected parts and prevent their installation to meet regulatory requirements.
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