A mechanic reported he removed and replaced (right/right) a propeller transfer tube on the right engine of an ATR-72 aircraft; instead of the left engine. As a result; the left engine transfer tube overflew the in-service time limits.

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Attributes
ACN	847663
Time
Date	200907
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	ATR 72
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Propeller Pitch Change Mechanism
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

Narrative:

I was assigned to work on propeller transfer tube for an ATR-72. There were two similar jobs on that aircraft which I read wrong and installed the wrong part; on the wrong side.

Original NASA ASRS Text

Title: A Mechanic reported he removed and replaced (R/R) a propeller transfer tube on the right engine of an ATR-72 aircraft; instead of the left engine. As a result; the left engine transfer tube overflew the in-service time limits.

Narrative: I was assigned to work on Propeller Transfer Tube for an ATR-72. There were two similar jobs on that aircraft which I read wrong and installed the wrong part; on the wrong side.

Data retrieved from NASA's ASRS site as of April 2012 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.