2000-08-10: CGGXO C150 was executing touch and goes runway 31 at Gander.The aircraft was instructed by Gander tower to do a right turn out to provide for ARN824
to do a left visual runway 31. CGGXO lost radio equipment and did not receive the instructions from tower and continued with a left turn out. Tower turned ARN824
to the left to establish for a right hand approach to Runway 31. ARN824
had the VFR traffic in sight and landed number two following CGGXO who required a green light for landing. Safety was not jeopradized. TSB CASE
CLOSED. More to follow. TSB Update: The Aircraft was inspected by maintenance and no fault could be found with the radio. It is suspected that a switch selection may have caused the communication failure. A three positon switch toggle as follows: # 1 Headset Audio, position # 2 No Audio and position # 3 Speaker Audio. If the switch is selected to the center position (#2) no audio to either headset or speaker will result and no incoming calls will be heard. The switch positions are not labelled which can make it difficult for a pilot to identify that an undesired selection has been made. The company is considering labelling the switch in this aircraft and one other in the fleet which has a similar set-up. A Transponder is not required for the Flying School operation at Gander International Airport. This aircraft was Transponder equipped but it was not serviceable. TSB File # A00A0033 Update from Maintenance and Manufacturing: Maintenance follow up did not reveal any physical, mechanical or electrical problems with the communication equipment installed in aircraft C-GGXO
. Aircraft returned to service with no further difficulties being reported. Update Augusat 10, 2000 This pilot received his licence 10 days prior to this incident so the CFI elected to have his previous instructor do some ground briefings on circuit procedures and proper radio communication.