Narrative:

I had departed 28A with 1 functioning and 1 inoperative communication radio. All my radio for communication #2 and both navs, which filtered through communication #1 were still functional. I picked up my IFR clearance to dlz from charlotte approach near concord, nc, direct to bzm VOR. Before reaching the bzm VOR I was cleared by ZTL from 4000 ft to 7000 ft for terrain beyond bzm. Upon entering the broken layer between 4000 ft and 7000 ft my functioning communication radio went mostly silent. I was still hearing faint, intermittent, static xmissions from other aircraft and center, but was unable to interpret any instructions or requests. I checked what I felt I could at the time. (Squelch, volume, headset connections, etc). After being unable to determine a cause of the trouble, I squawked 7600. Rather than flying the next 3 hours 'blind' with thunderstorm buildups between nc and oh, I decided it was in the interest of safety to descend below the cloud deck and fly VFR to the nearest airport. I then decided statesville, nc (svh) was the best place to land. Upon landing, the FBO let me know that they had talked to ZTL, and center knew I was on the ground and my flight plan was cancelled but remained in the system in case I got the problem fixed. After inspecting the radios, and adjusting their seating in the panel, both radios were now working. I cycled them 2 or 3 times, with the engine on and off, and decided to finish my flight. I reopened my flight plan with raleigh FSS, and had no radio problems from svh to dlz. At this time, I am unable to determine what the cause of the trouble was, and the radios have operated normally in the 6 flight hours since the failure.

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Original NASA ASRS Text

Title: LOW TIME IFR RATED PVT PLT HAS COM FAILURE ON IFR FLT. SQUAWKS 7600 AND LANDS AT VMC ARPT ENRTE.

Narrative: I HAD DEPARTED 28A WITH 1 FUNCTIONING AND 1 INOP COM RADIO. ALL MY RADIO FOR COM #2 AND BOTH NAVS, WHICH FILTERED THROUGH COM #1 WERE STILL FUNCTIONAL. I PICKED UP MY IFR CLRNC TO DLZ FROM CHARLOTTE APCH NEAR CONCORD, NC, DIRECT TO BZM VOR. BEFORE REACHING THE BZM VOR I WAS CLRED BY ZTL FROM 4000 FT TO 7000 FT FOR TERRAIN BEYOND BZM. UPON ENTERING THE BROKEN LAYER BTWN 4000 FT AND 7000 FT MY FUNCTIONING COM RADIO WENT MOSTLY SILENT. I WAS STILL HEARING FAINT, INTERMITTENT, STATIC XMISSIONS FROM OTHER ACFT AND CTR, BUT WAS UNABLE TO INTERPRET ANY INSTRUCTIONS OR REQUESTS. I CHKED WHAT I FELT I COULD AT THE TIME. (SQUELCH, VOLUME, HEADSET CONNECTIONS, ETC). AFTER BEING UNABLE TO DETERMINE A CAUSE OF THE TROUBLE, I SQUAWKED 7600. RATHER THAN FLYING THE NEXT 3 HRS 'BLIND' WITH TSTM BUILDUPS BTWN NC AND OH, I DECIDED IT WAS IN THE INTEREST OF SAFETY TO DSND BELOW THE CLOUD DECK AND FLY VFR TO THE NEAREST ARPT. I THEN DECIDED STATESVILLE, NC (SVH) WAS THE BEST PLACE TO LAND. UPON LNDG, THE FBO LET ME KNOW THAT THEY HAD TALKED TO ZTL, AND CTR KNEW I WAS ON THE GND AND MY FLT PLAN WAS CANCELLED BUT REMAINED IN THE SYS IN CASE I GOT THE PROB FIXED. AFTER INSPECTING THE RADIOS, AND ADJUSTING THEIR SEATING IN THE PANEL, BOTH RADIOS WERE NOW WORKING. I CYCLED THEM 2 OR 3 TIMES, WITH THE ENG ON AND OFF, AND DECIDED TO FINISH MY FLT. I REOPENED MY FLT PLAN WITH RALEIGH FSS, AND HAD NO RADIO PROBS FROM SVH TO DLZ. AT THIS TIME, I AM UNABLE TO DETERMINE WHAT THE CAUSE OF THE TROUBLE WAS, AND THE RADIOS HAVE OPERATED NORMALLY IN THE 6 FLT HRS SINCE THE FAILURE.

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.