Incorrect position light was installed on a B717. The part for the opposite side was installed.

Attributes
ACN	781709
Time
Date	200804
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Controlling Facilities	tower : zzzz.tower
Operator	common carrier : air carrier
Make Model Name	B717 (Formerly MD-95)
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance technician : 13
ASRS Report	781709
Events
Anomaly	maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : installation
Supplementary
Problem Areas	Maintenance Human Performance Company
Primary Problem	Maintenance Human Performance

Narrative:

I installed aircraft position/strobe light assembly on the right side and used the l-hand side assembly by mistake. Reference in accordance with amm. Factors: 1) pressure to get the plane out on time. 2) part numbers near identical and part appearance is identical. 3) pat locations were swapped I the stock room resulting in the wrong part pulled from correct location. 4) part number identify from manufacturer is etched in and not legible. R-hand side assembly part #XXX-2. This is the part installed. L-hand side assembly part #XXX-6. This is the correct part number not installed.

Original NASA ASRS Text

Title: INCORRECT POSITION LIGHT WAS INSTALLED ON A B717. THE PART FOR THE OPPOSITE SIDE WAS INSTALLED.

Narrative: I INSTALLED ACFT POS/STROBE LIGHT ASSEMBLY ON THE R SIDE AND USED THE L-HAND SIDE ASSEMBLY BY MISTAKE. REF IN ACCORDANCE WITH AMM. FACTORS: 1) PRESSURE TO GET THE PLANE OUT ON TIME. 2) PART NUMBERS NEAR IDENTICAL AND PART APPEARANCE IS IDENTICAL. 3) PAT LOCATIONS WERE SWAPPED I THE STOCK ROOM RESULTING IN THE WRONG PART PULLED FROM CORRECT LOCATION. 4) PART NUMBER IDENT FROM MANUFACTURER IS ETCHED IN AND NOT LEGIBLE. R-HAND SIDE ASSEMBLY PART #XXX-2. THIS IS THE PART INSTALLED. L-HAND SIDE ASSEMBLY PART #XXX-6. THIS IS THE CORRECT PART NUMBER NOT INSTALLED.

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