What was found
THE TECHNISONIC TDFM 9100 MULTI-BAND TRANSCEIVER AND RC-9100 REMOTE CONTROLLER SYSTEM WERE INSTALLED ON THIS ACFT UTILIZING THE CERTWORKS STC SR01052DE. PER THE 337, THE EXISTING CI 177-1 VHF ANTENNA FROM THE TDFM 6158 INSTALL WAS RETAINED FOR USE WITH THE TDFM 9100 SYS. AT SOME POINT, THE CI 177-1 ANTENNA WAS REMOVED BY UNKNOWN PERSONS AND A CI 292-2 WAS INSTALLED IN ITS PLACE. IT WAS NOTED THAT THE CI 292-2 ANTENNA IS NOT SUPPORTED FOR THE VHF FREQUENCY RANGE REQUIRED FOR THE TDFM-9100 SYS, BUT A CI 292-3 IS CALLED OUT FOR IN STC SR01052DE DRAWING CW0620-1096 REV IR AND WOULD SUPPORT THE PROPER VHF FREQUENCY RANGE OF 138-174 MHZ. A CONFORMITY 337 HAS BEEN CREATED TO CONFORM AND DOCUMENT THE INSTALLATION OF A CI 292-3 ANTENNA TO THE CERTWORKS STC SR01052DE DRAWING CW0620-1096 REV IR FOR THE TDFM 9100 INSTALLATION ON AN EC135 AS WELL AS AIR METHODS WIRING DIAGRAM “EC135 TDFM 9100 WIRING DIAGRAM”, DRAWING SE233-0248-0351 REV -.