What was found
UNUSUAL ROARING SOUND COMING FROM RT ENGINE WHEN POWER IS ADVANCED ABOVE 75 PERCENT N.G. REPLACED THE RT ENGINE
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UNUSUAL ROARING SOUND COMING FROM RT ENGINE WHEN POWER IS ADVANCED ABOVE 75 PERCENT N.G. REPLACED THE RT ENGINE