Aircrash Investigation Mystery Cache

The cache is not at the posted coordinates, but there is a pond filled with turtles, so bring some blood worms or mince  to feed them, and hang on to the geokids near the waters edge. 

One small plane was heading home from a long day of work.  

It swooped low over the pond to check out the turtles, when suddenly

cough cough splutter

catastrophic engine failure........

alpha bravo   bravo hotel.delta foxtrot golf

alpha charlie juliet   echo hotel. charlie golf charlie

This was the last transmission received.  Witnesses reported a cloud of smoke and a splash.   Can you find the black box and solve the aircrash investigation?

You can check your answers for this puzzle on GeoChecker.com.