Hydraulic Power — Hydraulic Reservoir Air Pressurization System Lines — Functional Tests
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform the new CMR functional test within 19 months from 2019-08-31 and repeat it every 4,000 flight hours thereafter. If the reservoir pressure does not reach 3.5 bars during testing, the affected hydraulic pipes or pressurization lines must be identified and repaired or replaced before the next flight. Compliance with these requirements is mandatory unless previously accomplished.
Summary
EASA Airworthiness Directive 2019-0188 is an airworthiness directive affecting Airbus A300-600, A300-600ST, and A310 aeroplanes. It mandates functional tests of the hydraulic reservoir air pressurization system lines to detect pipe ruptures and air leaks. The directive ensures continued airworthiness by requiring specific maintenance tasks related to hydraulic power systems.
What changed
This directive introduces a new Certification Maintenance Requirement (CMR) task involving functional checks of the reservoir air pressurization lines for pipe ruptures. It requires operators to perform repetitive pressurization tests and, if leaks are detected, to repair or replace affected components. This is an early implementation ahead of the expected update to the Airworthiness Limitations Section (ALS) Part 3 Revision 2.
Why it matters
This directive is critical for aviation professionals as it addresses potential safety risks from undetected leaks in hydraulic reservoir air pressurization lines, which could compromise hydraulic power systems. Operators and maintenance organizations must comply to avoid unsafe conditions and ensure regulatory compliance. Early adoption of this task helps maintain aircraft safety before the formal ALS update is published.
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