What was found
AIR SYS 2 OFF ALERT ILLUMINATED AND WITHIN SECONDS, THE AIR MANF 2 FAIL ALERT ILLUMINATED. RETURNED TO MEMPHIS. NO OTHER SECONDARY INDICATIONS. ACN RELEASED FOR SERVICE PER MEL/CDL: 36-23-01-02 CATEGORY: C EXPIRATION: 18MAY03 MEL 36-23-01-02: NR 2 MANIFOLD FAIL DETECTION LOOP INOP. MX MUST CLEAR ALERT PRIOR TO EACH DISPATCH. DO NOT PRESSURIZE PNEUMATIC SYS NR 2 EXCEPT FOR ENG START. CATEGORY -C- EXPIRATION DATE 18 MAY 03. *S/D* REPLACED MANIFOLD FAILURE CTRL, ALL LOOPS CHECK GOOD WITH TESTER AMM 36-23-01.