EASA AD No.: 2022-0170-E
Applicability:
Airbus A330-841 and A330-941 aeroplanes, all serial numbers.
Reason:
Occurrences were reported of leaking Bleed System High Pressure Valves (HPV), apparently due to
HPV clip failure and sealing ring damage. A leaking HPV may expose the Pressure Regulating Valve
(PRV), which is installed downstream from the HPV, to high pressure, possibly damaging the PRV
itself and preventing its closure, when required.
This condition, if not detected and corrected, could lead to high pressure and temperatures in the
duct downstream from the PRV, with possible duct burst, damage to several systems and
consequent loss of control of the aeroplane.
Probably it is better to ask Rolls to install 1 more Valve just in case ...