As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 MANIFOLD FAIL ALERT ILLUMINATED IN FLIGHT. DIVERTED TO STL PER THE QRH, ACN RELEASED FOR SERVICE PER MEL/CDL: 36-23-01-02 CATEGORY: C EXPIRATION: 18JUL04. 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. REMOVED AND REPLACED MANIFOLD FAILURE DETECTION CONTROL UNIT PER M/M 36-23-01-4, ALL SYSTEM TESTS PASS.