Powerplant — Breather Drains Mast Assembly — Inspection / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2018-0185
- Replaces
- 2019-0101
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform visual inspections of the affected breather drains mast assemblies within specified compliance times and every 24 months thereafter, sealing any detected cracks and replacing parts as required. The improved breather drains mast assembly must be installed within 24 months of the AD revision date. Concurrent modifications per Rolls-Royce service bulletins RB.211-72-H499 and RB.211-79-H640 are also required before or during the main modification.
Summary
EASA Airworthiness Directive 2019-0101R1 is a regulatory update addressing inspection and replacement requirements for the breather drains mast assembly on Rolls-Royce RB211 Trent 900 engines, primarily installed on Airbus A380 aircraft. The directive targets specific part numbers FW29847, KH31996, and the improved part KH83453, focusing on preventing cracks that could compromise the engine firewall. It mandates repetitive inspections and eventual replacement with an improved assembly to ensure continued airworthiness.
What changed
This revision extends the compliance time for the required modification by 23 months and updates the related Rolls-Royce service bulletin to Revision 2. It retains previous inspection and replacement requirements but allows a longer period before mandatory installation of the improved breather drains mast assembly. The AD supersedes earlier directives 2018-0185 and 2019-0101 and consolidates inspection and modification instructions.
Why it matters
This directive is critical for aviation professionals as it addresses a potential safety risk involving cracks in the engine breather drains mast assembly that could lead to firewall breaches and uncontrolled fires. Operators and maintenance organizations must comply to prevent in-flight engine hazards and ensure regulatory compliance. The extended compliance time provides operational flexibility while maintaining safety standards.
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