As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP ILLUMINATES ON RECALL. GROUNDED - YES. REMOVED AND REPLACED TRIM AIR MODULATING VALVE (CONTROL COMPARTMENT) PER B737-900 AMM 21-61-21. NO LEAKS NOTED AT THIS TIME. THIS CLEARS MEL 21-21G REMOVED INOP PLACARD SEAMC MARK CONTACTED. ZONE TEMP DOES NOT ILLUMINATE WHEN ON RECALL AT THIS TIME.