As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, BOTH DUCTS INDICATED BETWEEN 7 AND 17 PSI(PERFORMED FIM TASK 36-11 TASK 826. FOUND RIGHT ISOLATION VALVE FAULTY. REMOVED AND REPLACED RIGHT ISOLATION VALVE IAW AMM 36-11-07-404 AND PERFORMED LEAK CHECK. OPS CHECK & LEAK CHECK GOOD.</P>)