However, the simultaneous loss of radio and transponder signal would be a rare and alarming occurrence, and would normally indicate a catastrophic system failure or an aircraft crash.
( However ( , ( ( ( the ( simultaneous loss ) ) ( of ( radio ( and ( transponder signal ) ) ) ) ) ( ( ( ( ( would ( be ( a ( ( ( rare and ) alarming ) occurrence ) ) ) ) , ) and ) ( ( would normally ) ( indicate ( ( ( a ( catastrophic ( system failure ) ) ) or ) ( an ( aircraft crash ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB However)) (, ,) (NP (NP (DT the) (JJ simultaneous) (NN loss)) (PP (IN of) (NP (NN radio) (CC and) (NN transponder) (NN signal)))) (VP (VP (MD would) (VP (VB be) (NP (DT a) (ADJP (JJ rare) (CC and) (JJ alarming)) (NN occurrence)))) (, ,) (CC and) (VP (MD would) (ADVP (RB normally)) (VP (VB indicate) (NP (NP (DT a) (JJ catastrophic) (NN system) (NN failure)) (CC or) (NP (DT an) (NN aircraft) (NN crash)))))) (. .)))
A plane being safe while losing radio signal is about 1/10.
( ( ( A plane ) ( ( being safe ) ( while ( losing ( radio signal ) ) ) ) ) ( ( is ( about 1/10 ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN plane)) (VP (VBG being) (ADJP (JJ safe)) (PP (IN while) (S (VP (VBG losing) (NP (NN radio) (NN signal))))))) (VP (VBZ is) (NP (QP (RB about) (CD 1/10)))) (. .)))