As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED;' DURING DESCENT SYSTEM 1 V/S FLUCTUATED RAPIDLY +- 700 FT/MIN CREW AND PASSENGER EARS HURT. REPLACED #1 SYSTEM DATA ACQUISITION CONCENTRATOR (SDAC) PER AMM 31-55-34. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.