As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENGINE FAN AIR VALVE SEAL DISLODGED AND SITTING ON TOP OF ENGINE CORE. REF B737-900 IPC 36-12-02-01A ITEM 30. (ATTACHED TO PRE-COOLER). GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE PRECOOLER VALVE REF. 36-12-02. GROUND OPS CHECKS GOOD. PERFORMED A FOD INSPECTION OF AREA REF. AMM 05-52-00 NO DAMAGE NOTED.