new delhi the new year has not started on a particularly good note for the air india dreamliners in the first four days of this year two aircraft had to be grounded due to snags the troubles have erupted after a while as boeing had sent a big technical team to resolve the issues with ais dreamliners and carried out reliability modifications on them according to sources a boeing 787 was grounded in chennai on monday when it was to fly to chennai after a snag in the aircrafts spoiler speed retardation devices on the wings that move up and down to alter drag and during landing to increase rate of descent without this important device perfectly functional an airplane cant be allowed to get airborne earlier spoiler problems were very common with our dreamliners now this problem has resurfaced after a long time we hope it is not a trend and just a oneoff issue said the official on sunday night ais mumbailondon flight had taxied out to fly to its destination but the b787 soon developed a snag and then had to be called back to the parking bay rectifying the problem took some time by the time this issue was resolved the flying duty of the crew was not sufficient to operate to london a spare crew was available in delhi the aircraft flew to delhi where the new set of crew took over and then flew the aircraft to london said an official a senior ai official said boeing has tried to resolve the issues with the maharajas dreamliners things are much better than earlier but it is a new technology that suffers from teething troubles boeing had sent a big team of technicians to carry out modifications and improve dispatch reliability of these planes that team has just returned and boeing will continue to analyse the data from the planes some issues especially computer glitches still keep surfacing ai chairman ashwani lohani himself an engineer has specifically asked boeing to improve the reliability of these planes boeing and ai have together worked a lot on these planes and things are better now but some issues remain and we hope they too get resolved very fast ais turnaround relies very heavily on these fuelefficient dreamliners said the official ai has ordered 27 dreamliners and has got delivery of 21 so far