What was found
PASSING APPROXIMATELY 12,000 MSL RECEIVED MAIN CARGO ANNUNCIATION. QRH COMPLIED WITH. DECLARED EMERGENCY AND RETURNED TO KMEM. AMM: 52-71-09-2 CHECKED SENSOR GAPS ON SENSORS S890, S891, AND S892. FOUND S891 OUT OF LIMITS. ADJUSTED S891 TO BE WITHIN LIMITS OPS CHECKED GOOD. SENSORS S890 AND S892 WITHIN LIMITS. REMOVED FROM MEL.