The FAA proposes to adopt a new airworthiness directive AD for certain ATRGIE Avions de Transport Rgional Model ATR42 and ATR72 airplanes. This proposed AD was prompted by a report that a flight deck emergency escape hatch was difficult to open due to the hose ends being connected to the hatch with incorrect parts which could affect drainage of the hatch. This proposed AD would require inspection of the flight deck emergency escape hatch drain hose for discrepancies and applicable corrective actions and prohibit accomplishment of maintenance actions using the instructions of certain maintenance tasks as specified in a European Union Aviation Safety Agency EASA AD which is proposed for incorporation by reference IBR. The FAA is proposing this AD to address the unsafe condition on these products.