What was found
INTERMITTENT GEAR UNSAFE CENTER GEAR PERFORMED GO AROUND CONSULTED QRH LANDED UNEVENTFUL. PERFORMED MSC FAULT REVIEW OF LEG 01, NO FAULTS SHOWN. PERFORMED SELF TEST OF PSEU, IAW FIM 32-30-08-05, FIGURE 109, NO FAULTS NOTED OR OBSERVED. WILL CONTINUE TO T/S, IAW TSI. R & R CENTER GEAR LOCKED SENSORS D1-69 AND D1-184, REF MD-11 MM 32-61-16 AND WDM 32-61-02/32-61-03. OPERATIONS CHECKS GOOD, REF TSI 32-60/3604. PERFORMED CENTER LANDING GEAR RETRACTION AND EXTENTION CHECKS, IAW MD11 AMM 32-38-00-2. ALL INDICATIONS NORMAL.