A line mechanic was informed that a captain's pitch trim switch he had previously replaced on an erj...

Attributes
ACN	1021950
Time
Date	201207
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dusk
Aircraft 1
Make Model Name	EMB ERJ 190/195 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Horizontal Stabilizer Trim
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

July 2012. On aircraft X; an erj-190 aircraft; I removed and replaced the captain's pitch-trim switch in accordance with aircraft maintenance manual (amm). Did a return to service and operational test per amm. Operational check good; MEL was cleared. Two days later; pilot in ZZZ1 reported captain's yoke elevator trim (pitch trim) switch operates opposite to input. In ZZZ1; captain's [pitch] trim switch was re-installed per amm and operational check good; ok for service.

Original NASA ASRS Text

Title: A Line Mechanic was informed that a Captain's Pitch Trim switch he had previously replaced on an ERJ-190 aircraft was found installed backwards; after a Pilot reported the Pitch Trim operated opposite to input.

Narrative: July 2012. On Aircraft X; an ERJ-190 aircraft; I removed and replaced the Captain's Pitch-Trim switch in accordance with Aircraft Maintenance Manual (AMM). Did a Return to Service and Operational Test per AMM. Operational Check good; MEL was cleared. Two days later; Pilot in ZZZ1 reported Captain's yoke Elevator Trim (Pitch Trim) switch operates opposite to input. In ZZZ1; Captain's [Pitch] Trim switch was re-installed per AMM and Operational Check good; OK for service.

Data retrieved from NASA's ASRS site as of July 2013 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.

A line mechanic was informed that a captain's pitch trim switch he had previously replaced on an erj-190 aircraft was found installed backwards; after a pilot reported the pitch trim operated opposite to input.