As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX FLT 663 PHX - KOA. THE AIRCRAFT WAS GROUNDED. ON T/O RT PACK AND BLEED SHOWED OFF. ON CLIMB DUCT PSI VARIED 40-50 PSI. AS POWER IS PULLED TO IDLE RT PACK SHOWS OFF. REMOVED & REPLACED RT PACK FLOW CONTROL VALVE LEAK & OP CHECKED GOOD REF AMM 21-51-01-402.