As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT THE LH TAILPIPE HOT LIGHT ILLUMINATED ON THE CENTRAL WARNING PANEL. THE CREW FOLLOWED THE QRH AND RETURNED TO PIT. A/C TAKEN OUT OF SERVICE 4-12-04 AT 1415 (LT). PIT MX REMOVED MOISTURE CONTAMINATION FROM LT TAILPIPE SENSOR CONNECTION AND RESECURED CONNECTOR. A/C WAS GROUND RAN OPS CHECKS GOOD. A/C RETURNED TO SERVICE 4-12-04 AT 1620(LT).