What was found
PASSING FL336 RECEIVED EICAS MAIN CARGO DOOR- FOLLOWED QRH PRO. DECLARED EMERGENCY & RETURNED TO MEM. PASSING 10000 EICAS ALERT WENT OUT. FOUND S891 & S892 OUT OF ADJUSTMENT WITH NOT QUITE HALF OF THE SENSOR COVERED BY THE TARGETS. S891 WAS ALSO OUT OF GAP ADJUSTMENT AT 0.085 BETWEEN TARGET & SENSOR. MADE NECESSARY ADJUSTMENT TO THOSE SENSORS REF AMM 32-09-13-5, CHECKED SENSORS WITH LCR REF PROX SENSOR ADJ/TEST AMM32-09-13-5, VALUES NEAR WERE: S890=5.76MH, S891=5.48MH, S892=5.86MH. REINSTALLED SWITCH S891 AND ADJUSTED GAP REF AMM52-71-09-2. OPS CHECK GOOD. A/C OK FOR SERVICE.