What was found
AFTER LANDING INSPECTION FOUND OUTFLOW VALVE FULLY CLOSED. TRANSFER TO MDDR 143233 IAW DDG 21-31-01A, CAT C, DUE 12MAR21.LP 1145720: REMOVED AND REPLACED;MICRO SW PACK; PER AMM 22-32-04-402-069 DUE TO MICROSWITCH DAMAGE. FOUND PRESS SYS 1 & 2 OPT NORMAL. REF BITE TEST 21-31-00-705-001 NO FAULTS. ACCOMPLISHED MICRO SW ADJUSTMENT PROCEDURE REF AMM 22-32-04-402-065-G AND OPT REF AMM 22-32-04-402-069-H. NO FAULTS DETECTED. OPT NORMAL. OPT NORMAL REF AMM 21-31-00-705-001. NO FAULTS PRESENT. THIS CLEARS DMI # 143233.