What was found
ON APPROACH WITH GEAR LOWERED GEAR UNSAFE WITH THREE RED LIGHTS WITH GEAR HANDLE DOWN CHECKLIST GEAR SHOWED SAFE LANDED STRAIGHT AHEAD. JACKED A/C REF B717 AMM 07-11, PERFORMED ADJUSTMENT TEST OF LANDING GEAR INDICATION PER 717 AMM 32-00, NO FAULTS OR DISCREPANCIES NOTED REMOVED AND REPLACED PSEU AS PRECAUTIONARY REF AMM 32-61, DOWNJACKED A/C RTS PASSED.