As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INFLIGHT DUCT PRESSURE DIFFERENTIAL EXCEEDS 20 PSI. LEFT DUCT 14 PSI. RIGHT DUCT 40 PSI. GROUNDED - YES. PER FIM TASK 36-10 TASK 804 FOUND EXCESSIVE LEAKAGE COMING FROM #1 ENG PRSOV, REMOVED #1 ENG PRSOV REF AMM 36-11-04. E.RAMIREZ 54204.INSTALLED SERVICEABLE PRSOV PER AMM 36-11-04.LEAK CHECK GOOD. ACCOMPLISHED ENGINE BLEED AIR CROSSOVER TEST, OPS TEST GOOD IAW B737 AMM 36-11-00-710-801. NO DEFECTS NOTED.