What was found
TAIL COMPARTMENT, TEMP HIGH ANNUNCIATOR ILLUMINATED ON CLIMB THROUGH FL260. QRH 21.4 WAS RUN, ANNUNCIATOR EXTINGUISHED 1 MIN 45 SEC AFTER LT ENG THROTTLE WAS BROUGHT BACK TO IDLE. INSPECTED TAIL COMPARTMENT AREA & FOUND LT HIGH PRESS PNEUMATIC SENSE LINE LOOSE. TIGHTENED SENSE LINE AS REQUIRED. PERFORMED HIGH POWER ENG RUNS & NO DEFECTS WERE NOTED AT THIS TIME. ACFT OK FOR SERVICE IAW AMM 36-10-01.