Brasilia EMB-120 All Series
Maintenance Airframe; Maintenance Powerplant
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance
Flight Crew Overcame Equipment Problem; General Maintenance Action
Incorrect / Not Installed / Unavailable Part; Procedure
I was told to install a hot mic switch on the captain's yoke. I gained access to switch and wires before uninstall I labeled the 3 wires accordingly. Proceeded with the uninstall cut the wires; strip off the insulation and resoldered the 3 wires to the new switch as labeled. Reinstalled switch on yoke and ops checked it by comparing it with the First Officers's side. Ops check good. Signed it off. Pilot noticed the switch was upside down.I just soldered the 2 wires reverse of each other and installed switch upside down; so it function correctly upside down but right side up it was backwards. I then reinstalled the switch right side up. Signed it off as flipped switch. Then pilot noticed the hot mic switch and push to talk was reversed.
A maintenance Technician installed a 'Hot Mic' Switch on the captain's yoke upside-down.