Tech problems with the Jet2 737's are few and far between. I agree a/c do go tech now and again, but what are the chances of 1 going tech and then a further 4 a/c also having tech problems?? Jet2 have 5 a/c currently based at LBA with a 6th arriving in the new year.
Jet2 have had a very sucessful summer season and pride themselves on their time keeping! I believe there were no fligths cancelled over the summer due to tech problems.