A mechanic is informed he loaded the wrong software into aircraft data after changing the #2 engine electronic engine control (eec). The flight was subsequently canceled.

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Attributes
ACN	780884
Time
Date	200804
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-700
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	780884
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 other
Factors
Maintenance	contributing factor : schedule pressure contributing factor : briefing performance deficiency : testing performance deficiency : non compliance with legal requirements performance deficiency : installation
Supplementary
Problem Areas	Aircraft Environmental Factor Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

I was working an eec fault code on #2 engine. The fim recommended an eec change. I ordered an eec and looked in the box and verified the number I got off the eec was the same as the one I was putting on. In a hurry; because of an aircraft swap; I rushed to get the eec on. I entered the new engine serial number; did the eec self-test; which it passed. I then started to sign off my other work for the night. Started to help my other crew members to finish up the airplane because by then operations was calling to get the airplane at the gate as soon as possible. We brought the airplane to the gate and when I got back to the hangar we started auditing the paperwork. As we tried to figure out which software was loaded; the aircraft left for service. My lead called maintenance control and then told me I had the wrong software on the engine. I went with the sticker on the old eec to match it with the new eec. I put on the engine because they both had the same numbers on them.

Original NASA ASRS Text

Title: A MECHANIC IS INFORMED HE LOADED THE WRONG SOFTWARE INTO ACFT DATA AFTER CHANGING THE #2 ENG ELECTRONIC ENG CONTROL (EEC). THE FLIGHT WAS SUBSEQUENTLY CANCELED.

Narrative: I WAS WORKING AN EEC FAULT CODE ON #2 ENG. THE FIM RECOMMENDED AN EEC CHANGE. I ORDERED AN EEC AND LOOKED IN THE BOX AND VERIFIED THE NUMBER I GOT OFF THE EEC WAS THE SAME AS THE ONE I WAS PUTTING ON. IN A HURRY; BECAUSE OF AN ACFT SWAP; I RUSHED TO GET THE EEC ON. I ENTERED THE NEW ENG SERIAL NUMBER; DID THE EEC SELF-TEST; WHICH IT PASSED. I THEN STARTED TO SIGN OFF MY OTHER WORK FOR THE NIGHT. STARTED TO HELP MY OTHER CREW MEMBERS TO FINISH UP THE AIRPLANE BECAUSE BY THEN OPS WAS CALLING TO GET THE AIRPLANE AT THE GATE ASAP. WE BROUGHT THE AIRPLANE TO THE GATE AND WHEN I GOT BACK TO THE HANGAR WE STARTED AUDITING THE PAPERWORK. AS WE TRIED TO FIGURE OUT WHICH SOFTWARE WAS LOADED; THE ACFT LEFT FOR SVC. MY LEAD CALLED MAINT CTL AND THEN TOLD ME I HAD THE WRONG SOFTWARE ON THE ENG. I WENT WITH THE STICKER ON THE OLD EEC TO MATCH IT WITH THE NEW EEC. I PUT ON THE ENG BECAUSE THEY BOTH HAD THE SAME NUMBERS ON THEM.

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.