Mechanic is informed he changed the 'B' ignitor on the left engine of a crj-900 aircraft instead of ...

Attributes
ACN	813733
Time
Date	200811
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	CRJ 900 (all) Canadair Regional Jet 900
Operating Under FAR Part	Part 121
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	813733
Events
Anomaly	aircraft equipment problem : less severe maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : briefing performance deficiency : non compliance with legal requirements
Supplementary
Problem Areas	Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

I was assigned to aircraft X to change the ignitor B on the r-hand engine. I accidentally changed the ignitor B on the l-hand side and didn't catch the mistake when signing the work off. The aircraft never left the hangar ramp and later that day another shift attempted to start the l-hand engine resulting in 2 hot starts. When looking into the problem; they found the error in my paperwork and also that the fadec on both engines needed to be updated. They informed me of my mistake and I proceeded to write up and change the correct r-hand ignitor. Co-workers then updated the fadec's on both engines and test ran the engines finding no problems. We then signed off the paperwork. I was told to change the l-hand side B ignitor; but the ignitor written up in the maintenance log was for the r-hand side B ignitor; and missed the mistake when doing the paperwork. I need to be more aware of what I am doing and to always resort to the aircraft logbook and maintenance log for assurance on what needs to be done and where.

Original NASA ASRS Text

Title: MECHANIC IS INFORMED HE CHANGED THE 'B' IGNITOR ON THE LEFT ENGINE OF A CRJ-900 AIRCRAFT INSTEAD OF THE RIGHT ENGINE; EVEN THOUGH THE PAPERWORK HE SIGNED WAS FOR THE RIGHT POWERPLANT.

Narrative: I WAS ASSIGNED TO ACFT X TO CHANGE THE IGNITOR B ON THE R-HAND ENG. I ACCIDENTALLY CHANGED THE IGNITOR B ON THE L-HAND SIDE AND DIDN'T CATCH THE MISTAKE WHEN SIGNING THE WORK OFF. THE ACFT NEVER LEFT THE HANGAR RAMP AND LATER THAT DAY ANOTHER SHIFT ATTEMPTED TO START THE L-HAND ENG RESULTING IN 2 HOT STARTS. WHEN LOOKING INTO THE PROB; THEY FOUND THE ERROR IN MY PAPERWORK AND ALSO THAT THE FADEC ON BOTH ENGS NEEDED TO BE UPDATED. THEY INFORMED ME OF MY MISTAKE AND I PROCEEDED TO WRITE UP AND CHANGE THE CORRECT R-HAND IGNITOR. CO-WORKERS THEN UPDATED THE FADEC'S ON BOTH ENGS AND TEST RAN THE ENGS FINDING NO PROBS. WE THEN SIGNED OFF THE PAPERWORK. I WAS TOLD TO CHANGE THE L-HAND SIDE B IGNITOR; BUT THE IGNITOR WRITTEN UP IN THE MAINT LOG WAS FOR THE R-HAND SIDE B IGNITOR; AND MISSED THE MISTAKE WHEN DOING THE PAPERWORK. I NEED TO BE MORE AWARE OF WHAT I AM DOING AND TO ALWAYS RESORT TO THE ACFT LOGBOOK AND MAINT LOG FOR ASSURANCE ON WHAT NEEDS TO BE DONE AND WHERE.

Data retrieved from NASA's ASRS site as of May 2009 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.

Mechanic is informed he changed the 'B' ignitor on the left engine of a crj-900 aircraft instead of the right engine; even though the paperwork he signed was for the right powerplant.