An atx small transport had a communication failure in the WX.

Attributes
ACN	280050
Time
Date	199408
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : yip
State Reference	MI
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : yip tower : yip
Operator	common carrier : air taxi
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	cruise other descent : approach landing other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 4300 flight time type : 150
ASRS Report	280050
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time total : 4600
ASRS Report	280049
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

The aircraft was having intermittent radio problems and eventually all radios stayed 'hot.' the radios lost communication when switching over to detroit approach. At this point we squawked 7600 and proceeded as per last communication procedures. Regained radio reception during final approach segment, and received landing clearance. The WX was the contributing factor. Rain was leaking through the nose of the aircraft which caused the radios to get wet and short out. It was discovered when we lost reception and were informed of the 'hot microphone' situation once reception was restored. Before our departure, both radios appeared to be working normally. When trouble-shooting, we had no indication on one side that mikes were hot. When we were first experiencing difficulties, no one informed us that we were transmitting. If we were informed of this, that would have made trouble-shooting with the proper corrective action easier. Although the actions of the flight crew were not perfect, I believe we reacted as most crews would have.

Original NASA ASRS Text

Title: AN ATX SMT HAD A COM FAILURE IN THE WX.

Narrative: THE ACFT WAS HAVING INTERMITTENT RADIO PROBS AND EVENTUALLY ALL RADIOS STAYED 'HOT.' THE RADIOS LOST COM WHEN SWITCHING OVER TO DETROIT APCH. AT THIS POINT WE SQUAWKED 7600 AND PROCEEDED AS PER LAST COM PROCS. REGAINED RADIO RECEPTION DURING FINAL APCH SEGMENT, AND RECEIVED LNDG CLRNC. THE WX WAS THE CONTRIBUTING FACTOR. RAIN WAS LEAKING THROUGH THE NOSE OF THE ACFT WHICH CAUSED THE RADIOS TO GET WET AND SHORT OUT. IT WAS DISCOVERED WHEN WE LOST RECEPTION AND WERE INFORMED OF THE 'HOT MIKE' SIT ONCE RECEPTION WAS RESTORED. BEFORE OUR DEP, BOTH RADIOS APPEARED TO BE WORKING NORMALLY. WHEN TROUBLE-SHOOTING, WE HAD NO INDICATION ON ONE SIDE THAT MIKES WERE HOT. WHEN WE WERE FIRST EXPERIENCING DIFFICULTIES, NO ONE INFORMED US THAT WE WERE XMITTING. IF WE WERE INFORMED OF THIS, THAT WOULD HAVE MADE TROUBLE-SHOOTING WITH THE PROPER CORRECTIVE ACTION EASIER. ALTHOUGH THE ACTIONS OF THE FLC WERE NOT PERFECT, I BELIEVE WE REACTED AS MOST CREWS WOULD HAVE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.