As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN (LT SIDE) ALTIMETER, VERTICAL SPEED AND ALTITUDE ALERTER INOPERATIVE. FOUND THE PRIMARY ADC INOPERATIVE. REPLACED THE ADC, TESTED THE PRIMARY ALTIMETERY SYSTEMS, FOUND TO COMPLY WITH FAR AND TOBE RVSM COMPLIANT. THERE HAVE BEEN NO PREVIOUS PROBLEMS WITH THIS SYSTEM. (GL07200508784)