What was found
CAPTAIN REPORTED THAT AT 35,000 FT WITH ICE CONDITION, RT ENGINE COMPRESSOR WAS STALLED AND ABNORMAL PROCEDURE WAS PERFORMED. AIRCRAFT WAS SENT TO THE HANGAR AND BOROSCOPE INSPECTION ON 6TH, 7TH AND 13TH STAGES OF RT ENGINE WAS PERFORMED IAW MM 72-00-00. CHIP DETECTORS WERE CHECKED, BEING CORRECT. INLET AND OUTLET OF ENGINE WERE CHECKED IAW MM 71-00-00 AND OPERATIONAL TEST WAS PERFORMED IAW MM 71-00-01, ALL CORRECT