A B757-200 was dispatched with the incorrect FMC control display unit installed.

Attributes
ACN	546383
Time
Date	200204
Day	Sun
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	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance supervisor : 14
ASRS Report	546383
Person 2
Affiliation	company : air carrier
Function	maintenance : lead technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : installation performance deficiency : logbook entry
Supplementary
Problem Areas	Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

It was close to 'go time' when called out for #2 FMC CDU was 'blank.' went out to aircraft, could not restore. Called over radio for FMC CDU to be ordered for aircraft X. Was told part ordered and in stock. Picked up part, had someone check to see if any software was needed. Answer was 'no.' maintenance manual: saud check for fail lights, that a position in it displayed, and dim knobs are checked for lighting. We researched for correct part and notified downtown control center about problem. Found out that was already on placard and part was on order. It is the technician's ultimate responsibility to check and verify. Will now check parts that are already installed, parts ordered by someone else, and from 'memory' against maintenance computer system ipc.

Original NASA ASRS Text

Title: A B757-200 WAS DISPATCHED WITH THE INCORRECT FMC CTL DISPLAY UNIT INSTALLED.

Narrative: IT WAS CLOSE TO 'GO TIME' WHEN CALLED OUT FOR #2 FMC CDU WAS 'BLANK.' WENT OUT TO ACFT, COULD NOT RESTORE. CALLED OVER RADIO FOR FMC CDU TO BE ORDERED FOR ACFT X. WAS TOLD PART ORDERED AND IN STOCK. PICKED UP PART, HAD SOMEONE CHK TO SEE IF ANY SOFTWARE WAS NEEDED. ANSWER WAS 'NO.' MAINT MANUAL: SAUD CHECK FOR FAIL LIGHTS, THAT A POSITION IN IT DISPLAYED, AND DIM KNOBS ARE CHECKED FOR LIGHTING. WE RESEARCHED FOR CORRECT PART AND NOTIFIED DOWNTOWN CTL CTR ABOUT PROB. FOUND OUT THAT WAS ALREADY ON PLACARD AND PART WAS ON ORDER. IT IS THE TECHNICIAN'S ULTIMATE RESPONSIBILITY TO CHK AND VERIFY. WILL NOW CHK PARTS THAT ARE ALREADY INSTALLED, PARTS ORDERED BY SOMEONE ELSE, AND FROM 'MEMORY' AGAINST MAINT COMPUTER SYS IPC.

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.