What was found
PILOT EXPERIENCED N2 DROOP ON TAKEOFF WITH SLOW RECOVERY. CONDITION WORSENED DURING TROUBLESHOOTING UNTIL ENGINE WOULD NOT ACHIEVE IDLE SPEED. FUEL NOZZLE REMOVED AND DISASSEMBLED. FILTER ELEMENT FOUND CRUSHED AND TWISTED, RESTRICTING FUEL FLOW AT SPEEDS ABOVE IDLE SPEED. NO FUEL CONTAMINATION EVIDENT IN AIRFRAME FILTER OR FCU FILTER. IT IS POSSIBLE FILTER ELEMENT WAS CRUSHED AT TIME OF OVERHAUL AND IS NOT A REGULAR INSP ITEM EXCEPT FOR CLEANING. SUBMITTER RECOMMENDS FILTER BE INSP AT 100-HOUR INTERVALS PAYING ATTN TO SEATING FILTER ELEMENT BEFORE FURTHER ASSY IAW MDHC/ACT MM AND INSPECT ANY NOZZELS IN STOCK OR UPON RECEIVING FROM O/H FOR THIS CONDITION.