As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GEAR EXTENSION HAD ALL 3 UNSAFE RED LIGHTS AND GEAR DOOR OPEN LIGHT.PERFORMED LANDING GEAR UNSAFE GEAR HANDLE DOWN CKLIST.HYDRAULIC QTY AND PRESS NORMAL.LANDED WITH EMERGENCY GEAR EXTENSION HANDLE PULLED, THREE GREEN LIGHTS AND GEAR DOOR OPEN LIGHT ON. CA-T/S PER MM.BITE CK PSEU OK.JACKED A/C.CYCLED GEAR SEVERAL TIMES.ALL INDICATIONS NORMAL. REPLACED RELAY R2-28 PRECAUTIONARY.ALL CKS NORMAL.