High Pressure Compressor Abradable Liner Loss
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of aircraft equipped with BR700-725A1-12 engines, serial numbers 25453 and 25454, should perform inspections of the HPC front case lining stages 1 to 4 following the instructions in Rolls-Royce NMSB SB-BR700-72-A900726. Depending on inspection findings, corrective actions should be taken as recommended. There are no specified compliance deadlines, but prompt attention is advised to mitigate safety risks.
Summary
EASA Safety Information Bulletin SIB No. 2022-04 addresses the issue of high pressure compressor abradable liner loss in Rolls-Royce BR700-725A1-12 engines, specifically serial numbers 25453 and 25454. The bulletin informs operators about potential deterioration of the HPC front case lining, which could lead to engine in-flight shutdown and reduced aircraft control. It provides guidance on inspection procedures to detect missing or deteriorating lining material.
What changed
This bulletin introduces awareness of a safety concern related to the HPC front case lining material loss in certain BR700-725A1-12 engines. It references Rolls-Royce Deutschland Ltd & Co KG Non-Modification Service Bulletin SB-BR700-72-A900726, which provides inspection instructions for HPC stages 1 to 4. The bulletin does not mandate an Airworthiness Directive but recommends inspections and corrective actions as necessary.
Why it matters
This information is critical for aviation professionals because HPC liner deterioration can cause engine shutdown during flight, posing safety risks and operational disruptions. Operators and maintenance organizations must be vigilant in inspecting affected engines to prevent potential failures. Compliance teams should monitor this issue to ensure timely inspections and maintain airworthiness without mandatory regulatory enforcement at this time.
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