Baltia Air Lines Inc. (fka BLTA)

[DarthPilot]

OK O&W I had answered my last statement correctly...here is reg that says 50% of the main cabin doors...not sure where you got four slides/doors...the FAA requires five on the main cabin...B747-200 has 10 main cabin slides...read on.

https://www.law.cornell.edu/cfr/text/14/121.291

(c) In conducting the partial demonstration required by paragraph (b) of this section, each certificate holder must:
(1) Demonstrate the effectiveness of its crewmember emergency training and evacuation procedures by conducting a demonstration, not requiring passengers and observed by the Administrator, in which the flight attendants for that type and model of airplane, using that operator's line operating procedures, open 50 percent of the required floor-level emergency exits and 50 percent of the required non-floor-level emergency exits whose opening by a flight attendant is defined as an emergency evacuation duty under§ 121.397, and deploy 50 percent of the exit slides. The exits and slides will be selected by the administrator and must be ready for use within 15 seconds;