What was found
TROUBLESHOT EXCESSIVE HEAT IN CABIN, FOUND LEFT ENGINE MODULATING SHUT-OFF VALVE DEFECTIVE, STAYING IN FULL PRESSURE BLEED. VALVE WAS NOT REGULATING CORRECTLY. REPLACED VALVE WITH REPAIRED VALVE, PERFORMED PRESSURIZATION OPERATIONAL CHECKS. NO DEFECTS NOTED. ALL WORK PERFORMED IN ACCORDANCE WITH THE MM-99, 36-10-00.