b ▁out ▁of ▁the ▁un control led ▁V FR ▁cor rid or ▁into ▁the ▁controlled ▁Class ▁B ▁air space ▁above . ▁However , ▁for ▁reasons ▁unknown ▁as ▁yet , ▁he ▁was ▁not ▁in ▁communication ▁with ▁any ▁air ▁traffic ▁controllers ▁after ▁he ▁switched ▁frequencies ▁from ▁T eter bor o ▁tower . ▁He ▁also ▁apparently ▁was ▁not ▁communic ating ▁on ▁the ▁Cor rid or ' s ▁self - ann ounce ▁frequency . ▁ ▁The ▁N T SB ▁recommended ▁that ▁the ▁F AA ▁rev ise ▁the ▁procedures ▁for ▁A TC ▁facilities ▁in ▁the ▁area ▁to ▁facil itate ▁the ▁process ▁for ▁V FR ▁traffic ▁that ▁wishes ▁to ▁trans it ▁Class ▁B ▁air space . ▁This ▁included ▁establish ing ▁procedures ▁to ▁coordinate ▁such ▁requests ▁between ▁facilities ; ▁requiring ▁controllers ▁to ▁instruct ▁pil ots ▁to ▁self - ann ounce ▁on ▁the ▁V FR ▁cor rid or ▁frequency ▁if ▁they ▁are ▁unable ▁to ▁immediately ▁enter ▁Class ▁B ▁air space ; ▁adding ▁information ▁to ▁area ▁Autom atic ▁Terminal ▁Information ▁Service ▁( AT IS ) ▁broadcast s ▁rem inding ▁pil ots ▁to ▁use ▁the ▁self - ann ounce ▁frequency ; ▁and ▁ens uring ▁that ▁pil ots ▁are ▁provided ▁with ▁traffic ▁advis ories ▁if ▁they ▁are ▁in ▁contact ▁with ▁a ▁controller . ▁ ▁Additionally , ▁the ▁N T SB ▁recommended ▁that ▁A TC ▁controllers ▁and ▁super vis ors ▁be ▁brief ed ▁in ▁the ▁circumstances ▁of ▁this ▁accident ; ▁that ▁a ▁Special ▁Fl ight ▁R ules ▁Area ▁( SF RA ) ▁be ▁established ▁for ▁the ▁location ▁requiring ▁special ▁training ▁for ▁pil ots ▁trans iting