What was found
DURING THE LAST FLIGHT OF THE DAY, THE ACFT WAS DESCENDING WITH 7.5% PITCH. AS SOON AS PITCH WAS PULLED IN, NR 1 ENG WENT INTO COMPRESSOR STALL WITH A TEMP OF 780F. A LOWER PITCH SETTING OF 8% WAS SET & PULLED IN POWER WITH THE SAME RESULT. ENG FLIGHT IDLES MATCHED WITHIN 1%. ENG GND IDLES MATCHED WITHIN 1%. POWER CHECK PERFORMED EARLIER WITH SATISFACTORY RESULT. BORESCOPED ENG COMPRESSOR SECTION & TURBINE FOR ANY DAMAGE. NO DEFECTS NOTED. CHECKED AIRFRAME & FCU FUEL FILTER. NO DEFECTS NOTED.