What was found
DURING DESCENT THROUGH 22,000, LOST NAVIGATIONAL ABILITIES, RADAR, BAROMETRIC SETTINGS, AP, AND A/T. NO FAULTS UPON ARRIVAL TO ACFT. COMPLIED WITH TSM 31-53-00-810-974 AND TSM 76-12-00-810-836 WITH NO FAULTS. COMPLIED WITH AFS TEST IAW AMM 22-96-00 TEST OK. AIRCRAFT WAS GROUNDED.