As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 3000 FT, ALTIMETERS WERE OFF BY APRROX 700 FT, AND INCREASING ALTITUDE WAS OFF BY 1200 FT, DURING RETURN FOR LANDING. DURING APPROACH GPWS STARTED GOING OFF PULL UP TERRAIN ETC. INCREASED LANDING TOUCH DOWN SPEED AS PRECAUTION. DRAINED WATER FROM DRAINS PERFORMED LEAKAGE TEST IAW AMM 34-13-00 IS GOOD. GPWS OP CHECKS GOOD IAW AMM 34-43-00. ACFT IS RVSM ELIGIBLE. ACFT IS COMPLIANT FOR CAT II OPERATIONS.