LOSS OF RADIO CONTACT SPURS PVT PLT TO EXERCISE THE MANDATES OF LOST COM PROC. MISSED A FEW POINTS.

Narrative

AS A RESULT OF BEING INTIMIDATED BY MYF TWR TO COMPLETE MY RUN-UP AND PREPARE FOR DEP IN LESS THAN 5 MINS; I HAD NOT FULLY REVIEWED MY IFR CLRNC WHICH WAS DIFFERENT THAN FILED NOR COMPLETED MY NAV SET-UP. ONCE LEVEL AND IN CONTACT WITH SAN DEP; WHILE SETTING UP FOR THE NEXT FIX; I ENCOUNTERED A STRONG WINDSHEAR WHICH RESULTED IN A TEMPORARY LOSS OF ACFT CTL. AFTER AN INDETERMINATE AMOUNT OF TIME I BECAME AWARE THAT THE RADIO FREQ WAS UNUSUALLY SILENT AND THAT I WAS THEN OVER THE LA BASIN AREA. REALIZING AFTER SEVERAL ATTEMPTS TO MAKE CONTACT WITH ATC THAT I HAD FAILED COM; I BEGAN TO IMPLEMENT FAILED COM PROCS. SINCE I WAS IN IMC; I INITIATED ASCENT TO THE MEA AND CONTINUED ON THE AIRWAY ASSIGNED IN THE CLRNC. SEVERE TURB PREVENTED ME FROM BEING ABLE TO REACH DOWN TO THE XPONDER TO SQUAWK THE EMER CODE. I WAS; HOWEVER; ABLE TO CONTINUE TO TROUBLESHOOT THE COMS. ALTHOUGH FARS STATE EMER PROCS ARE TO SQUAWK 7700/7600; I WAS UNABLE TO DO SO AND CONTINUE TO SAFELY OPERATE THE ACFT. I WAS IN IMC; IN SEVERE TURB OVER MOUNTAINOUS TERRAIN AND MY PRIMARY CONCERN WAS TO CLB ABOVE THE MEA AND MAINTAIN COURSE ON THE AIRWAY. UNDER THE EXISTING CONDITIONS; I COULD NOT SAFELY TAKE MY EYES OFF THE INSTS LONG ENOUGH TO LOOK DOWN AT THE XPONDER. HENCE; MY DECISION TO AVIATE AND NAV FIRST. LUCKILY; I DISCOVERED THE CAUSE OF THE RADIO PROB AND RE-ESTABLISHED CONTACT. I LATER CONCLUDED THE PROB WAS CAUSED BY A RADIO SWITCH BEING ACCIDENTALLY FLIPPED OFF DURING THE WINDSHEAR ENCOUNTER.