A B757-200 was dispatched in non compliance with the incorrect main ship's battery installed.

Attributes
ACN	593307
Time
Date	200309
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : fcc technician : powerplant technician : airframe
Experience	maintenance technician : 23
ASRS Report	593307
Person 2
Affiliation	company : air carrier
Function	other personnel other
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure
Independent Detector	other other : person 2
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : logbook entry performance deficiency : non compliance with legal requirements performance deficiency : installation
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

I was called to aircraft X for a dead battery. I researched what battery I needed using the B757 ipc and then converted the manufacturer's part number to a company part number to locate the part in our stock room. Here is where I made my mistake. The company part number for the battery that is used in my aircraft (a B757) and the B767 both end in xo, I pulled and installed the wrong battery. They are both identical in shape and size. When I put my log sheets in the computer, company's stock personnel caught the mistake. The aircraft was now in ZZZ1 and the correct battery was installed in the aircraft. As an amt, I have to make sure that the part I am installing in an aircraft has the correct effectivity for that aircraft. I think that parts that are the same in size and shape should be marked with the aircraft that they go in. Example: B757 only.

Original NASA ASRS Text

Title: A B757-200 WAS DISPATCHED IN NON COMPLIANCE WITH THE INCORRECT MAIN SHIP'S BATTERY INSTALLED.

Narrative: I WAS CALLED TO ACFT X FOR A DEAD BATTERY. I RESEARCHED WHAT BATTERY I NEEDED USING THE B757 IPC AND THEN CONVERTED THE MANUFACTURER'S PART NUMBER TO A COMPANY PART NUMBER TO LOCATE THE PART IN OUR STOCK ROOM. HERE IS WHERE I MADE MY MISTAKE. THE COMPANY PART NUMBER FOR THE BATTERY THAT IS USED IN MY ACFT (A B757) AND THE B767 BOTH END IN XO, I PULLED AND INSTALLED THE WRONG BATTERY. THEY ARE BOTH IDENTICAL IN SHAPE AND SIZE. WHEN I PUT MY LOG SHEETS IN THE COMPUTER, COMPANY'S STOCK PERSONNEL CAUGHT THE MISTAKE. THE ACFT WAS NOW IN ZZZ1 AND THE CORRECT BATTERY WAS INSTALLED IN THE ACFT. AS AN AMT, I HAVE TO MAKE SURE THAT THE PART I AM INSTALLING IN AN ACFT HAS THE CORRECT EFFECTIVITY FOR THAT ACFT. I THINK THAT PARTS THAT ARE THE SAME IN SIZE AND SHAPE SHOULD BE MARKED WITH THE ACFT THAT THEY GO IN. EXAMPLE: B757 ONLY.

Data retrieved from NASA's ASRS site as of July 2007 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.