EASA AD 2023-0147R2
Time Limits / Maintenance Checks — Main Gearbox Suspension Bar Pins / Fittings — Re-calculation of Life Limits / Replacement / Modification; Fuselage — Main Gearbox Suspension Bar Pins / Fittings — Replacement / Modification
Summary
EASA Airworthiness Directive 2023-0147R2 is an updated regulatory document addressing the main gearbox suspension bar pins and fittings on Airbus Helicopters AS 332 L2 and EC 225 LP models. It provides revised instructions for recalculating life limits, replacing affected parts, and performing modifications to ensure continued airworthiness. The directive applies to specific part numbers of pins and fittings related to the main gearbox suspension bars.
What Changed
This revision relaxes the previously required flight hour limits for compliance by removing flight hour restrictions and extending calendar compliance times for both AS 332 L2 and EC 225 LP helicopters. It updates definitions of affected and serviceable parts, revises modification instructions, and extends compliance deadlines. The directive supersedes earlier versions including AD 2023-0147R1 and AD 2022-0021.
Why It Matters
This directive is critical for aviation professionals to prevent potential structural failures of main gearbox suspension bar pins and fittings, which could compromise helicopter safety. Operators and maintenance organizations must ensure accurate life recalculations and timely replacement or modification of affected parts to maintain regulatory compliance and aircraft airworthiness. The updated compliance times provide operational flexibility while maintaining safety standards.
What To Do
Operators of AS 332 L2 and EC 225 LP helicopters must recalculate the life of affected pins and fittings using the specified add-on factors and replace parts before exceeding service life limits. Group 1 helicopters must complete required modifications within the revised compliance times to transition to Group 2 configuration. Inspections and replacements must be conducted according to the instructions in the referenced Airbus Helicopters Service Bulletins and Airworthiness Limitations Sections.