Riddle me this notam decoder
 

WEF 27 APR AD AVBL FOR A-330 ACFT AND ITS MODIFICATIONS WITH TOTAL MEAN ANNUAL FLIGHT INTENSITY RESTRICTION OF 2 DEPARTURES PER WEEK AND IN THE PRESENCE OF ENGINEERING-TECHNICAL PERSONNEL AND MAINTENANCE KIT ON BOARD.
REF AIP AD 1.5-10. 28 APR 04:50 2009 UNTIL PERM. CREATED: 28 APR 05:23 2009

End quote: Must be pretty bad when ATC Notams are used to warn you about an AD note on your aircraft...

I understand there was a very rapid effort to replace probe heaters in the remaining substandard installations on the A330s.