Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 1380

b) an emergency electrical supply system of sufficient capacity and endurance, following loss of all normally generated power to, as a minimum: Note.— If a battery is used to satisfy the requirement for a second power source (see 2 a) above), an additional electrical power supply may not be required. 1) maintain the operation of all essential flight instruments, communication and navigation systems during a descent from the maximum certificated altitude in an autorotational configuration to the completion of a landing; 2) maintain the operation of the stabilization system, if applicable; 3) lower the landing gear, if applicable; 4) where required, provide power to one pitot heater, which must serve an airspeed indicator clearly visible to the pilot; 5) provide for the operation of the landing light; 6) provide for one engine restart, if applicable; and 7) provide for the operation of the radio altimeter;

Source: https://magyarkozlony.hu/hivatalos-lapok/1f7c6b0e16b4b71a92e5ad24416008bbe2e26aab/dokumentumok/710811d1f7f958a2990684d0cbf918e84f5497e5/letoltes