As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION DUE TO STALL FAIL CAUTION MSG DURING CRUISE FLIGHT. FLIGHT LH 3172 SCHEDULED, DIVERTED, BECAUSE OF A STALL FAIL CAUTION MSG DURING CRUISE FLIGHT. MDC READOUT SHOWED: RT-AOA FROZEN, ACCORDING FIM AND AMM 27-35-05 RT-AOA TRANSDUCER CHANGED. STALL TEST AND OPS TEST OF RT AOA VANE IAW AMM 27-35-05-710-801 A01. PERFORMED, SATISFIED. ACFT RETURNED TO SERVICE.