As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GPS LIGHT IS NOT SHOWING ANY INDICATION ON THE FMC POS-REF PAGE, NO ASSOCIATED STATUS MESSAGE PRESENT. RESET LEFT MMR. PERFORMED LT MMR MAT TEST PASSED. RESET AIMS, NO HELP. STILL NO GPS LIGHT COORDINATE DISPLAY ON FMC ONLY. RT GPS DISPLAY OK. REPLACED MMR-L AND GROUND TEST FOR ILS-L AND GPS-L PASS IAW MM. CONFIRMED LEFT GPS POSITION EXIST ON LT FMS POS-REF PAGE.