As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE PNEUMATIC DUCT PRESSURE NEEDLE SPLIT WAS INTERMITTENTLY 25PSI ( LT 45 PSI & RT 20 PSI ). AT OTHER TIMES IT WAS AS LITTLE AS 10 PSI DIFFERENTIAL. ACCOMPLISHED NR 2 ENGINE BLEED AIR SYS HEALTH CHECK IAW T/C NG-36WC-00001. PRECOOLER CONTROL VALVE FAILED HEALTH CHECK. R & R THE PCV IAW AMM 36-12-02-400-801. OPS CHECK GOOD. ACCOMPLISHED BLEED AIR OPS TEST & REPAIR CONFIRMATION REF MM 36-11-00-710-801 & FIM 36-10-00-810-807. DUCT PRESSURE DETERMINED TO BE WITHIN CHART LIMITS AT REFERENCED POWER SETTINGS.