What was found
GRI - AFTER TAKEOFF, CREW ELECTED AN AIR TURN-BACK WHEN THE NR 1 ALTIMETER FLAGGED AND THE ALTITUDE ALERT WENT BLANK. AN UNEVENTFUL LANDING WAS ACCOMPLISHED. MAINTENANCE REPLACED ALTIMETER WHICH TESTED SATISFACTORILY.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
GRI - AFTER TAKEOFF, CREW ELECTED AN AIR TURN-BACK WHEN THE NR 1 ALTIMETER FLAGGED AND THE ALTITUDE ALERT WENT BLANK. AN UNEVENTFUL LANDING WAS ACCOMPLISHED. MAINTENANCE REPLACED ALTIMETER WHICH TESTED SATISFACTORILY.