As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK INOP AND LT PACK FLUCTUATING BETWEEN 20 AND 35 PSI. ENG BLEED BITE BOX SHOWED RT ENG PRSOV FAULT & WIRE FAULT, RESET BOX. RAN BOTH ENGS ISOLATED, RT ENG BLEED WOULD NOT OPEN W-SWITCH IN. BITE BOX AGAIN SHOWED RT ENG PRSOV FAILURE. REPLACED RT PRSOV, RAN ENG OPS NORMAL.