As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN LANDING GEAR DID NOT EXTEND USING ALTERNATE GEAR SWITCH. ON 2ND ATTEMPT HAD RT MAIN BUT STILL NO LEFT. REPLACED LT MLG DOOR ACTUATOR IAW MM. LEAK AND OPS CHECK GOOD IAW MM. PERFORMED ALTERATE EXTENSION SYSTEM TEST IAW MM. TEST GOOD.