Narrative:

On departure from lna on runway 9; I attempted to contact palm beach approach to get my filed clearance to sfb. I could not reach pbi approach and therefore flew east maintaining ground contact until over the ocean at about 800 feet MSL. I could not get pbi approach and heard several aircraft advising pbi that there was a stuck mike. I switched frequency to 125.2 and was again hearing many complaints that there was a stuck mike. I tried to turn west to return to lna but the ceiling over land was about 400 feet to 600 feet. I tried to maintain ground contact but I missed sight of the airport! Knowing there were towers at 1;600 to 1;800 feet high west of lna airport; I again reversed course back to the east and flew back out over the ocean. Turning back to the west; I saw the airport close aboard at 9:00 o'clock; chopped the power; and landed. When the lineman came out (in a driving rain); he told me that palm beach had called and told me to shut off my radios and call them. I did and pbi approach told me I had done the right thing by first selecting codes 7700 and then 7600 on my transponder and that they had heard everything I was telling my co-pilot/student. Turns out my captain's side mike and phone jacks had shorted together and caused a stuck mike on all radios. I called the on-field avionics shop who discovered the problem and separated the mike plug from the phone plug and cured the problem.

Related reports:

Google
 

Original NASA ASRS Text

Title: After departing LNA; the instructor pilot was unable to contact PBI approach because of a stuck mike; which turned out to be his. The ceiling was quite low; but he was able to return to LNA.

Narrative: On departure from LNA on runway 9; I attempted to contact Palm Beach approach to get my filed clearance to SFB. I could not reach PBI approach and therefore flew east maintaining ground contact until over the ocean at about 800 feet MSL. I could not get PBI approach and heard several aircraft advising PBI that there was a stuck mike. I switched frequency to 125.2 and was again hearing many complaints that there was a stuck mike. I tried to turn west to return to LNA but the ceiling over land was about 400 feet to 600 feet. I tried to maintain ground contact but I missed sight of the airport! Knowing there were towers at 1;600 to 1;800 feet high west of LNA airport; I again reversed course back to the east and flew back out over the ocean. Turning back to the west; I saw the airport close aboard at 9:00 o'clock; chopped the power; and landed. When the lineman came out (in a driving rain); he told me that Palm Beach had called and told me to shut off my radios and call them. I did and PBI approach told me I had done the right thing by first selecting codes 7700 and then 7600 on my transponder and that they had heard everything I was telling my co-pilot/student. Turns out my Captain's side mike and phone jacks had shorted together and caused a stuck mike on all radios. I called the on-field avionics shop who discovered the problem and separated the mike plug from the phone plug and cured the problem.

Data retrieved from NASA's ASRS site 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.