As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT RIGHT DUCT PRESSURE 44 PSI, LEFT DUCT 14 PSI. LEVEL OFF RIGHT 44 PSI, LEFT 21 PSI. DESCENT BOTH EVEN AT 40 PSI W/ THROTTLE IDLE. ACFT GROUNDED. ACCOMPLISHED FIM 36-10 TASK 810. L/H PRSOV & PCCV FAIL WRENCH CHECKS. NO OTHER DEFECTS NOTED. REMOVED AND REPLACED LT PRSOV & PCCV. BOTH OPS & LEAK CHECK OK IAW AMM 36-11-04-400 & 36-12-02/400.