Maintenance technician found incorrect maintenance accomplished on aircraft thrust reverser.

Attributes
ACN	1650169
Time
Date	201905
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Landing
Component
Aircraft Component	Thrust Reverser Control
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

Narrative:

I took a call from aircraft X telling me that 'no.1 TR failed to open on landing '; which I had the captain document in the log book. I then called ZZZ mx to alert them of this issue along with the fact that the no. TR was MEL'd and ric was the ZZZ1 base it was at prior to this first flight of the day and to make certain the MEL deactivation was correctly performed. A call came in from ZZZ informing me that the wrong icu was inhibited. They remedied the issue and the aircraft was returned to service. This was also an issue one day before; I was not working then; and the same discovery was made and remedied. I am guessing the closeness of the icu 1 and icu 2 is confusing to some. Follow manual procedures and take close look at work after doing it while comparing it to manual pics.

Original NASA ASRS Text

Title: Maintenance Technician found incorrect maintenance accomplished on aircraft thrust reverser.

Narrative: I took a call from Aircraft X telling me that 'No.1 TR failed to open on landing '; which I had the Captain document in the log book. I then called ZZZ MX to alert them of this issue along with the fact that the No. TR was MEL'd and RIC was the ZZZ1 base it was at prior to this first flight of the day and to make certain the MEL deactivation was correctly performed. A call came in from ZZZ informing me that the wrong ICU was inhibited. They remedied the issue and the aircraft was returned to service. This was also an issue one day before; I was not working then; and the same discovery was made and remedied. I am guessing the closeness of the ICU 1 and ICU 2 is confusing to some. Follow Manual procedures and take close look at work after doing it while comparing it to manual pics.

Data retrieved from NASA's ASRS site 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.