Airworthiness directives › 2017-08-08
AD 2017-08-08 Airworthiness Directives; CFE Company Turbofan Engines
Applicability*9
This AD applies to CFE Company (CFE) CFE738-1-1B model turbofan engines with a high-pressure compressor (HPC) impeller, part number (P/N) 6079T77P07 or P/N 6079T77P09, with a serial number listed in CFE Service Bulletin (SB) CFE738-72-8080, Revision 0, dated August 18, 2016, installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Remove all affected HPC impellers from service at the next piece-part exposure and replace with a part eligible for installation.
Unsafe condition
This AD was prompted by a quality escape for HPC impellers made from forgings with nonconforming material grain size. We are issuing this AD to prevent uncontained failure of the HPC impeller, damage to the engine, and damage to the airplane.
Affected ADs
None.
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