What was found
CABIN ALT MSG RECEIVED AT FL370. STARTED DESCENT BUT PUT MODE S ELECT TO AUTO 2. GOT CABIN BACK. *DM* MX NOTE. NO FAULTS FOUND ON #1 & #2 CABIN PRESSURE CNTLS REF AMM 21-30-802. PRESSURISED A/C IN MANUAL MODE. OPERATION TEST GOOD IN MANNUAL MODE REF 21-31-00-715-001. NO AIR GROUND RELAY FAULTS NOTED ON EICAS. A/C OK FOR FLIGHT. MEL APPLIED ON #1 CABIN PRESS.CNTL C/W DDP CABIN ALT AUTO 1 DEFERRED REF MEL 2131A ACCOMPLISHED FIM21-30 FAULT TREE 803,NO FAULTS FOUND,NO MESSAGES NOTED,NO HISTORY.