A B737-700 was dispatched in non compliance with the incorrect captain's control CDU installed.

Attributes
ACN	572750
Time
Date	200302
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Person 1
Affiliation	company : air carrier
Function	maintenance : lead technician
ASRS Report	572750
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
ASRS Report	573081
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure contributing factor : manuals performance deficiency : non compliance with legal requirements performance deficiency : repair performance deficiency : logbook entry
Supplementary
Problem Areas	Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Crew of aircraft called on aircraft radio stating captain's CDU was locked up and would not accept any information. Tried resetting FMC circuit breakers. No help. Called line shop and asked for mechanic to bring a CDU. The parts tag indicated the part was ok to install on -300, -500, and -700 aircraft. The logbook was signed off by mechanic. (I installed the CDU.) aircraft CDU operated normally. Aircraft dispatched to ZZZ. Upon entering information from log page, computer would not accept the parts tag. Upon further review we discovered the CDU we installed was not compatible with all 700 aircraft. Maintenance control notified of situation. Maintenance control said they would inform line maintenance to have the proper CDU installed in captain's position upon arrival at ZZZ.

Original NASA ASRS Text

Title: A B737-700 WAS DISPATCHED IN NON COMPLIANCE WITH THE INCORRECT CAPT'S CTL CDU INSTALLED.

Narrative: CREW OF ACFT CALLED ON ACFT RADIO STATING CAPT'S CDU WAS LOCKED UP AND WOULD NOT ACCEPT ANY INFO. TRIED RESETTING FMC CIRCUIT BREAKERS. NO HELP. CALLED LINE SHOP AND ASKED FOR MECH TO BRING A CDU. THE PARTS TAG INDICATED THE PART WAS OK TO INSTALL ON -300, -500, AND -700 ACFT. THE LOGBOOK WAS SIGNED OFF BY MECH. (I INSTALLED THE CDU.) ACFT CDU OPERATED NORMALLY. ACFT DISPATCHED TO ZZZ. UPON ENTERING INFO FROM LOG PAGE, COMPUTER WOULD NOT ACCEPT THE PARTS TAG. UPON FURTHER REVIEW WE DISCOVERED THE CDU WE INSTALLED WAS NOT COMPATIBLE WITH ALL 700 ACFT. MAINT CTL NOTIFIED OF SIT. MAINT CTL SAID THEY WOULD INFORM LINE MAINT TO HAVE THE PROPER CDU INSTALLED IN CAPT'S POS UPON ARR AT ZZZ.

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.