A B737-500 was dispatched with the incorrect standby power module installed.

Attributes
ACN	726522
Time
Date	200612
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	B737-500
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
ASRS Report	726522
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far
Independent Detector	other other : 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 performance deficiency : inspection
Supplementary
Problem Areas	Environmental Factor Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Maintenance Human Performance

Narrative:

Maintenance control had call and gave us a heads-up on aircraft coming with a problem with a standby power 'off' light illuminated. So we pull a standby power module and R330 relay for that aircraft. Once in range I remember during maintenance computer parts compatibility on both parts. I don't know if I was rushing or got distraction; but I did assume the part was good. Once I was made aware of the problem; I went to maintenance computer parts compatibility; put in information; and it showed that no 'rotables' found matching criteria. So as I do on a lot of maintenance computer parts compatibility inquiries; I put an 'X' by part number; hit key 'F1' and a block comes up showing stores aircraft 89-105; 300-500 all 600 series lease aircraft include acquisition aircraft.

Original NASA ASRS Text

Title: A B737-500 WAS DISPATCHED WITH THE INCORRECT STANDBY PWR MODULE INSTALLED.

Narrative: MAINT CTL HAD CALL AND GAVE US A HEADS-UP ON ACFT COMING WITH A PROB WITH A STANDBY PWR 'OFF' LIGHT ILLUMINATED. SO WE PULL A STANDBY PWR MODULE AND R330 RELAY FOR THAT ACFT. ONCE IN RANGE I REMEMBER DURING MAINT COMPUTER PARTS COMPATIBILITY ON BOTH PARTS. I DON'T KNOW IF I WAS RUSHING OR GOT DISTR; BUT I DID ASSUME THE PART WAS GOOD. ONCE I WAS MADE AWARE OF THE PROB; I WENT TO MAINT COMPUTER PARTS COMPATIBILITY; PUT IN INFO; AND IT SHOWED THAT NO 'ROTABLES' FOUND MATCHING CRITERIA. SO AS I DO ON A LOT OF MAINT COMPUTER PARTS COMPATIBILITY INQUIRIES; I PUT AN 'X' BY PART NUMBER; HIT KEY 'F1' AND A BLOCK COMES UP SHOWING STORES ACFT 89-105; 300-500 ALL 600 SERIES LEASE ACFT INCLUDE ACQUISITION ACFT.

Data retrieved from NASA's ASRS site as of January 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.