Two pilots working for SpiceJet were detained Monday in Jaipur after flying with fake certificates.
Already last week, Indian officials found at least four pilots who allegedly used forged documents. Two of them are still in custody, the other two have been released but are still being examined.
Authorities say one problem is that many students go abroad to become pilots but only obtain fake or invalid licenses. Furthermore, some flying schools may not abide by the rules of aviation regulatory authorities.