As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1239, LAS-CUN(DIVERTED TO TPA). GPS PRIMARY LOST IN FLIGHT ; T/S PER TSM 34-52-00-810-847-A. MMR 1& 2 TEST GOOD. ATC 1 & 3 TEST GOOD. GPS VISIBILITY GOOD. R&R MMR1 AS PRECAUTION IAW AMM 34-36-31. BITE TEST GOOD. NO FAULTS NOTED @ THIS TIME