As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ENGINE AT TAKEOFF AND CRUISE AT 40,000 FT AND ABOVE REQUIRED N2 TO BE HIGHER BY 1 - 1.5 PERCENT HIGHER THAN NORMAL FOR A SPECIFIC N1. PROBELEM FOUND TO BE A COMPRESSOR BLEED VALVE NOT CLOSING COMPLETELY. PROBLEM CAUSED BY LEAKING (BROKEN) GASKET BETWEEN COMPRESSOR BLEED VALVE AND BLEED VALVE SERVO (TORK MOTOR). (TC NR 20060817004)