NEW : FAA spokeswoman says it does n't appear issue was related to weather . Warning concerned runway 23 , the same runway the crashed plane was lined up to impact . Warning warned pilots of ` ` abrupt pitch up , slow airspeed , and approach to stall '' Southwest Airlines spokeswoman said earthen dam was interfering with signals .
NEW : FAA spokeswoman says it does n't appear issue was related to crash . Warning concerned runway 23 , the same one the crashed plane was lined up to use . Airline advised possibility of `` abrupt pitch up , slow airspeed , and approach to stall '' Southwest Airlines spokeswoman said earthen dam was interfering with signals .