As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MNL - FLT 876 - NR 1 AND NR 2 GPS SHOW EXCESSIVE WINDS, 120 AT 215 KNOTS, TAS SHOWS 123 KNOTS AT ALL ATTITUDES. TAS INPUT FAILURE INDICATED ON NR 1 GPS. BOTH GPS UNRELIABLE. RETURNED TO MNL. REPLACED NPU NR 1 AND ADC NR 1 AND NR 2. OPS CHECK PER MM 34-12-11. OPS CHECK FOR NPU INTERFACE PER MM HT 9000 SATISFACTORY. REFERENCE: OPERATOR CONTROL NR MZZA96062.