Narrative:

Aircraft X was scheduled remain over night (ron); aircraft was suspected to be completed prior to shift change so no turnover to dayshift was given. Vibration survey was final task left; due to a blade change which night shift could not complete due to vibration computer malfunction. Paperwork and turnover was then delivered to the lead. [A coworker] and myself [were tasked] to complete the vibration survey; providing us with the blade change paperwork and the survey card. After avionics repaired the computer issue [we] continued with the survey. Before starting engines we questioned which engine had the blade change due to no reference to what engine was written on the blade change card. I called [our supervisor] to inquire to what engine required the survey and was informed it was engine #1; actually engine 2 required the run. We completed the survey on engine 1 with no issues and signed off the last 2 blocks of the blade change card. All other paperwork for aircraft was previously signed off.upon discussing problem after the fact with night shift technician on following day it was determined that the survey was done on the wrong engine.supervision was also given improper verbal turnover as to which engine was worked on. Work package was presumed completed except vibration survey so the blade change task was not reviewed extensively enough by all involved; although the maintenance task was stamped off prior to us performing the survey. We all rely on each other to complete tasks in a timely matter; however we must always review the paperwork especially if direct turnover is not given.

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Original NASA ASRS Text

Title: A Technician reported that a Vibration Survey on an Airbus A321 was performed on the wrong engine.

Narrative: Aircraft X was scheduled Remain Over Night (RON); aircraft was suspected to be completed prior to shift change so no turnover to dayshift was given. Vibration survey was final task left; due to a blade change which night shift could not complete due to vibration computer malfunction. Paperwork and turnover was then delivered to the lead. [A coworker] and myself [were tasked] to complete the vibration survey; providing us with the blade change paperwork and the survey card. After avionics repaired the computer issue [we] continued with the survey. Before starting engines we questioned which engine had the blade change due to no reference to what engine was written on the blade change card. I called [our supervisor] to inquire to what engine required the survey and was informed it was engine #1; actually Engine 2 required the run. We completed the survey on engine 1 with no issues and signed off the last 2 blocks of the blade change card. All other paperwork for aircraft was previously signed off.Upon discussing problem after the fact with night shift technician on following day it was determined that the survey was done on the wrong engine.Supervision was also given improper verbal turnover as to which engine was worked on. Work package was presumed completed except vibration survey so the blade change task was not reviewed extensively enough by all involved; although the maintenance task was stamped off prior to us performing the survey. We all rely on each other to complete tasks in a timely matter; however we must always review the paperwork especially if direct turnover is not given.

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.