TM 55-1510-219-10 Table 5-3.  Required Equipment Listing Number of items installed SYSTEM VFR Day and/or VFR Night COMPONENT IFR Day IFR Night Icing Conditions REMARKS and/or Exceptions AIR CONDITIONING Bleed Air Fail Light 2 - - 1 1 2 Provided bleed air is not used from side of failed light. Pressurization Controller 1 1 1 1 1 1 Safety Valve 1 1 1 1 1 1 Outflow Valve 1 1 1 1 1 1 Altitude Warning 1 1 1 1 1 1 May   be   inoperative   provided   airplane   remains unpressurized. Cabin Rate of Climb 1 1 1 1 1 1 Differential Pressure/Cabin Altitude 1 1 1 1 1 1 Pressurization Air Source 2 1 1 1 1 1 Duct Overtemp Light 1 - - - - - May be inoperative provided bleed air is not used. COMMUNICATIONS Interphone System 1 - - - - - VHF Communications Systems 2 - - - - - Static Discharge Wicks 24 - - 24 24 24 Minimum required - one wick at the outboard end of   each   control   surface   plus   top   of   vertical stabilizer ELECTRICAL POWER Battery 1 1 1 1 1 1 Battery Charge Light 1 1 1 1 1 1 DC Generator 2 1 1 2 2 2 DC Loadmeter 2 2 2 2 2 2 One may be inoperative provided corresponding generator caution light Is monitored. One may be DC Generator Caution Light 2 2 2 2 2 2 inoperative provided corresponding loadmeter is monitored. Inverter 2 1 1 2 2 2 Inverter Warning Light 1 - - 1 1 1 May be inoperative provided both inverters are operative. AC Frequency/Voltmeter 2 2 2 2 2 2 EQUIPMENT FURNISHINGS Seat Belts and Shoulder Harnesses; Pilot and Co-Pilot 2 * * * * * * One per installed seat. Emergency Locator transmitter 1 - - - - - 5-11