A B737-800 was dispatched in non compliance with the incorrect emergency light housing installed.

Attributes
ACN	626860
Time
Date	200407
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	B737-800
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	626860
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : non availability of parts contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : installation performance deficiency : logbook entry
Supplementary
Problem Areas	Maintenance Human Performance Environmental Factor Aircraft Chart Or Publication
Primary Problem	Maintenance Human Performance

Narrative:

I was assigned to aircraft X on no fix no fly item. Item is emergency light housing deteriorating. Removed light assembly and housing and ordered part came from ZZZ1. Confirmed part number were the same and accomplished operational check, normal. But was informed today by the day shift supervisor, that I may have installed wrong part and I wish to report. I installed parts easily incorrectly without force and operations check is good. That made me feel that was correct.

Original NASA ASRS Text

Title: A B737-800 WAS DISPATCHED IN NON COMPLIANCE WITH THE INCORRECT EMER LIGHT HOUSING INSTALLED.

Narrative: I WAS ASSIGNED TO ACFT X ON NO FIX NO FLY ITEM. ITEM IS EMER LIGHT HOUSING DETERIORATING. REMOVED LIGHT ASSEMBLY AND HOUSING AND ORDERED PART CAME FROM ZZZ1. CONFIRMED PART NUMBER WERE THE SAME AND ACCOMPLISHED OPERATIONAL CHK, NORMAL. BUT WAS INFORMED TODAY BY THE DAY SHIFT SUPVR, THAT I MAY HAVE INSTALLED WRONG PART AND I WISH TO RPT. I INSTALLED PARTS EASILY INCORRECTLY WITHOUT FORCE AND OPS CHK IS GOOD. THAT MADE ME FEEL THAT WAS CORRECT.

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.