A B737-700 was dispatched with the incorrect ground proximity computer installed.

Attributes
ACN	702324
Time
Date	200606
Local Time Of Day	1201 To 1800
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
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : lead technician
Qualification	technician : repairman technician : powerplant technician : airframe
Experience	maintenance avionics : 12 maintenance lead technician : 2 maintenance repairman : 8
ASRS Report	702324
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 : far non adherence : published procedure
Independent Detector	other other : 3
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : manuals contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : inspection performance deficiency : logbook entry performance deficiency : installation
Supplementary
Problem Areas	Environmental Factor Chart Or Publication Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Incorrect part number ground proximity computer installed. As the installing and signing technician; it is my responsibility to ensure that the correct parts have been ordered and are being installed on aircraft. My complacency in accepting someone else's word led directly to the installation of the wrong part number ground proximity computer. The installation/self test as required by the applicable maintenance manual gave no indication that the wrong part had been installed. I was also distraction by an inbound WX radar write-up that was a must fix due to the aircraft routing.

Original NASA ASRS Text

Title: A B737-700 WAS DISPATCHED WITH THE INCORRECT GND PROX COMPUTER INSTALLED.

Narrative: INCORRECT PART NUMBER GND PROX COMPUTER INSTALLED. AS THE INSTALLING AND SIGNING TECHNICIAN; IT IS MY RESPONSIBILITY TO ENSURE THAT THE CORRECT PARTS HAVE BEEN ORDERED AND ARE BEING INSTALLED ON ACFT. MY COMPLACENCY IN ACCEPTING SOMEONE ELSE'S WORD LED DIRECTLY TO THE INSTALLATION OF THE WRONG PART NUMBER GND PROX COMPUTER. THE INSTALLATION/SELF TEST AS REQUIRED BY THE APPLICABLE MAINT MANUAL GAVE NO INDICATION THAT THE WRONG PART HAD BEEN INSTALLED. I WAS ALSO DISTR BY AN INBOUND WX RADAR WRITE-UP THAT WAS A MUST FIX DUE TO THE ACFT ROUTING.

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.