RNING SYSTEM - INTEGRATED AREA NAVIGATION TURNED OFF BY WIRING RECOMMENDED CHANGE. SERVICE BULLETIN MOS 28-NOV-20I2 SB 737-34-2454 NAVIGATION- AIR DATA SYSTEM - ALTIMETRY SYSTEM TEST. SERVICE BULLETIN MOS SS 737-34-2461 NAVIGATION- ATC SYSTEM- ROCKWELL COLLINS AIR TRAFFIC CONTROL TRANSPONDER REPLACEMENT. SERVICE R