What was found
BOS - FLT 1527 - AFTER TAKEOFF BOS, TAIL COMPARTMENT HIGH LIGHT ILLUMINATED. TAIL COMPARTMENT HIGH LIGHT EXTINGUISHED AFTER PACK SWITCH TURNED OFF. RETURNED BOS AND LANDED WITHOUT INCIDENT. REMOVED LEFT HAND AUGMENTATION VALVE CLAMP, CLEANED VALVE SURFACE. REINSTALLED LEFT AUGMENTATION VALVE CLAMP. RAN ENGINE AT LOW POWER CHECKED NORMAL. RAN ENGINE AT TAKEOFF POWER WITH NO LEAKS NOTED. ACCOMPLISHED LEAK CHECK PER MAINTENANCE MANUAL. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)