What was found
RIGHT LOW PITCH ANNUNCIATOR INOPERATIVE. SYSTEM OPERATIVE, LIGHT BULB OK. REPLACED RT SWITCH ASSY, AND CORRECTED PROBLEM. SUBMITTER STATED THESE SWITCHES ARE NOT VERY DEPENDABLE, MAYBE SWITCH DESIGN NOT COMPATIBLE WITH ENVIRONMENT WHERE INSTALLED, TEMPERATURE HOT/COLD, VIBRATION, WET/DRY, ETC.