What was found
FLT 6159 - RIGHT PACK OVERPRESSURIZES AFTER TRANSFER TO ENGINE BLEED. RETURNED TO LAX. SECURED DUCT ON LEFT PACK. OPERATED BOTH PACKS WITH NO DEFECTS NOTED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLT 6159 - RIGHT PACK OVERPRESSURIZES AFTER TRANSFER TO ENGINE BLEED. RETURNED TO LAX. SECURED DUCT ON LEFT PACK. OPERATED BOTH PACKS WITH NO DEFECTS NOTED.