As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE IP VALVE FAULTED IN FLIGHT. WOULD NOT RESET. ACCOMPLISHED BITE ON PNEUM NR 1 SYSTEM CONTROL, FAILED RAN AIR VALVE AND TEMP CONT SNES. ON FAN AIR VALVE REPLACEMENT FOUND AIR VALVE BUTTERFLY VALVE DISCONNECTED FROM CONTR. ROTATING FREELY. REPLACED FAN AIR VALVE NR 1 IAW MM 36-11-14-4 AND REPLACED TEMP SENS IAW MM 36-11-21-4. ACCOMPLISHED ENG RUN AND RE-BITE NR 1 CONT, ALL TESTS IND PASSED OK. (M)