SDR H0CR2018050101

Service difficulty report · Compressor · Aerosp AS355F2

Difficulty date: April 26, 2018
Submitted: May 2, 2018
Operation: General aviation
Make and model: Aerosp AS355F2
Aircraft serial: 5411
Aircraft time: 11,522 hours
Engine: Allsn 250C20F
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Compressor
Part number: 23057142
Condition: Delaminated
Location: Engines
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

NR 1 AND 2 ENGINE POWER CHECKS WERE TRENDING DOWN. DURING ROUTINE 300HR/12MONTH INSPECTION, FOUND EXCESSIVE DELAMINATION OF THE LINING OF THE COMPRESSOR CASE HALVES ON THE ENGINES. REPLACED THE WORN CASE HALVES, AND PERFORMED POWER CHECKS, RESULTS WERE IMPROVED AND SATISFACTORY.

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