On our original ops spec we had the 6.2 and 5.7 limitation...after a trip to Airbus, we got the extended limits with concurence with the Feds. We have been operating the 330 since 03 and have had only 2 problems with the loss of GPS and I think it was traced to the MMR. Still much better than having the navs make wild excursions prior to the ADIZ, our 320s operater under the shorter time limits