What was found
ON GROUND F/O, CAPT , STBY ALTIMETER W/IN 50 FEET. AT 290 F/O AND CAPT ALTIMETER AGREED . AT 330 F/O READ 32.6 AND STBY READ 330 . F/O AIRSPEED WAS 10 TO 15 KTS SLOWER THAN CAPTAIN R/I 07AUG21 01:33 SNA U REASON CODE : PREMATURE REMOVAL/INSTALLATION OFF MPN: 4045053-914 POS: 2 SRL: 87020534 TAG NBR: H56414 ON MPN: 4045053-914 CPN: 3412889 SRL: 94081751 TAG NBR: 596458 FACT 07AUG21 01:33 SNA U PERFORMED AIR DATA SYSTEM BITE TEST PER TSM 34-10-00NOT ABLE TO DUPLICATE THE PILOT REPORT, ALL READING ARE NORMAL. R/R #2 ADC PER MM 34-11-34 AND #2 MAIN ALTIMETER PER MM 34-12-21 ADS BITE TEST ALL READINGS NORMAL A/C OK FOR SERVICE PERFORMED AIR DATA SYSTEM BITE TEST PER TSM 34-10-00. NOT ABLE