Narrative:

During my runup on the ramp of runway 29R the tower informed me that the tower was closing and that there were two other aircraft in the area. An small aircraft a on the downwind and an small aircraft B approaching on the ILS. Both were landing on runway 29R. I acknowledged the transmission and changed my radio to 124.0 the CTAF for torrance. Less than one min elapsed to complete my runup and I taxied up to the hold line for runway 29R. By this time the small aircraft a was on short final and I waited for him to land. The small aircraft B reported the OM. I could see his landing light and estimated him to be 3 to 4 mi out. No other traffic had reported to be in the pattern the entire time I was tuned to 124.O. I reported departing on runway 29R, and departed. Upon being in the air I changed to 124.3 for los angeles departure for the shoreline departure. Approximately 10 mi down the coast los angeles informed me that I had departed 'directly in front of another aircraft on short final' and 'that I had not announced my departure on the CTAF'. The remainder of my flight and the return was uneventful. On 5-X-90, I went to torrance tower to discuss it with the tower staff. They reviewed the tapes with them that just happened to still be running as they had not turned them off before my departure. My transmission announcing my departure was not on the tape. And the tower controller who had called los angeles departure stated that there was 'more than adequate sep for my departure, but he was concerned that I had not announced my departure'. I explained to the tower staff and in particular the chief controller at the time that there must be an intermittent problem with my radio as this was the second time in that a transmission had not been received. They stated that there was not a problem as far as they were concerned for any type of violation of far's. I later delivered my airplane to a shop and they determined that there was a faulty contact on my microphone button. It is now being replaced.

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Original NASA ASRS Text

Title: REPORTER ACCUSED OF TAKING OFF IN FRONT OF AN ACFT ON FINAL APCH.

Narrative: DURING MY RUNUP ON THE RAMP OF RWY 29R THE TWR INFORMED ME THAT THE TWR WAS CLOSING AND THAT THERE WERE TWO OTHER ACFT IN THE AREA. AN SMA A ON THE DOWNWIND AND AN SMA B APCHING ON THE ILS. BOTH WERE LNDG ON RWY 29R. I ACKNOWLEDGED THE XMISSION AND CHANGED MY RADIO TO 124.0 THE CTAF FOR TORRANCE. LESS THAN ONE MIN ELAPSED TO COMPLETE MY RUNUP AND I TAXIED UP TO THE HOLD LINE FOR RWY 29R. BY THIS TIME THE SMA A WAS ON SHORT FINAL AND I WAITED FOR HIM TO LAND. THE SMA B RPTED THE OM. I COULD SEE HIS LNDG LIGHT AND ESTIMATED HIM TO BE 3 TO 4 MI OUT. NO OTHER TFC HAD RPTED TO BE IN THE PATTERN THE ENTIRE TIME I WAS TUNED TO 124.O. I RPTED DEPARTING ON RWY 29R, AND DEPARTED. UPON BEING IN THE AIR I CHANGED TO 124.3 FOR LOS ANGELES DEP FOR THE SHORELINE DEP. APPROX 10 MI DOWN THE COAST LOS ANGELES INFORMED ME THAT I HAD DEPARTED 'DIRECTLY IN FRONT OF ANOTHER ACFT ON SHORT FINAL' AND 'THAT I HAD NOT ANNOUNCED MY DEP ON THE CTAF'. THE REMAINDER OF MY FLT AND THE RETURN WAS UNEVENTFUL. ON 5-X-90, I WENT TO TORRANCE TWR TO DISCUSS IT WITH THE TWR STAFF. THEY REVIEWED THE TAPES WITH THEM THAT JUST HAPPENED TO STILL BE RUNNING AS THEY HAD NOT TURNED THEM OFF BEFORE MY DEP. MY XMISSION ANNOUNCING MY DEP WAS NOT ON THE TAPE. AND THE TWR CTLR WHO HAD CALLED LOS ANGELES DEP STATED THAT THERE WAS 'MORE THAN ADEQUATE SEP FOR MY DEP, BUT HE WAS CONCERNED THAT I HAD NOT ANNOUNCED MY DEP'. I EXPLAINED TO THE TWR STAFF AND IN PARTICULAR THE CHIEF CTLR AT THE TIME THAT THERE MUST BE AN INTERMITTENT PROB WITH MY RADIO AS THIS WAS THE SECOND TIME IN THAT A XMISSION HAD NOT BEEN RECEIVED. THEY STATED THAT THERE WAS NOT A PROB AS FAR AS THEY WERE CONCERNED FOR ANY TYPE OF VIOLATION OF FAR'S. I LATER DELIVERED MY AIRPLANE TO A SHOP AND THEY DETERMINED THAT THERE WAS A FAULTY CONTACT ON MY MICROPHONE BUTTON. IT IS NOW BEING REPLACED.

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.