|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||atc facility : sli|
|Altitude||msl bound lower : 1600|
msl bound upper : 1600
|Controlling Facilities||tracon : sna|
|Operator||general aviation : instructional|
|Make Model Name||Small Aircraft, High Wing, 1 Eng, Fixed Gear|
|Flight Phase||cruise other|
|Route In Use||enroute : on vectors|
|Function||instruction : instructor|
|Qualification||pilot : atp|
pilot : cfi
|Experience||flight time last 90 days : 90|
flight time total : 3200
flight time type : 1200
|Function||controller : approach|
|Qualification||controller : radar|
|Anomaly||aircraft equipment problem : less severe|
non adherence : far
|Independent Detector||other flight crewa|
|Resolutory Action||controller : issued new clearance|
|Air Traffic Incident||other|
While trying to transmit over VHF communication radio to ATC discovered transmitters were not transmitting. Since occurrence was in VMC, I was about to squawk 1200 and proceed to an uncontrolled airport in VMC. As ATC had assigned 1600' MSL and heading 180 degrees, which was taking us beyond power off gliding distance of land (over pacific ocean). Then ATC assigned vector to bring us back toward land so I continued as assigned by ATC. When they discovered that I could not transmit, they told me to respond with identify when xmissions received, which I did. After landing investigation revealed nothing as the radios would then transmit, but I suspect microphone defect possible. Suggest carrying spare microphone/headset for possible supplemental use in these situations.
Original NASA ASRS Text
Title: SMA HAD TRANSMITTER FAILURE WHILE ON AN IFR FLT PLAN IN VMC.
Narrative: WHILE TRYING TO XMIT OVER VHF COM RADIO TO ATC DISCOVERED XMITTERS WERE NOT XMITTING. SINCE OCCURRENCE WAS IN VMC, I WAS ABOUT TO SQUAWK 1200 AND PROCEED TO AN UNCTLED ARPT IN VMC. AS ATC HAD ASSIGNED 1600' MSL AND HDG 180 DEGS, WHICH WAS TAKING US BEYOND PWR OFF GLIDING DISTANCE OF LAND (OVER PACIFIC OCEAN). THEN ATC ASSIGNED VECTOR TO BRING US BACK TOWARD LAND SO I CONTINUED AS ASSIGNED BY ATC. WHEN THEY DISCOVERED THAT I COULD NOT XMIT, THEY TOLD ME TO RESPOND WITH IDENT WHEN XMISSIONS RECEIVED, WHICH I DID. AFTER LNDG INVESTIGATION REVEALED NOTHING AS THE RADIOS WOULD THEN XMIT, BUT I SUSPECT MICROPHONE DEFECT POSSIBLE. SUGGEST CARRYING SPARE MIC/HEADSET FOR POSSIBLE SUPPLEMENTAL USE IN THESE SITUATIONS.
Data retrieved from NASA's ASRS site as of August 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.