A B737 had a r-hand wing slat access panel depart the aircraft. Discovered after 12 legs flown.

Attributes
ACN	680389
Time
Date	200511
Local Time Of Day	0001 To 0600
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 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	680389
Person 2
Affiliation	company : air carrier
Function	maintenance : inspector
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure
Resolutory Action	none taken : detected after the fact
Factors
Maintenance	performance deficiency : inspection performance deficiency : non compliance with legal requirements performance deficiency : installation
Supplementary
Problem Areas	Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

I was assigned to aircraft X r-hand wing. I installed r-hand wing slat panel per the maintenance manual to the best of my knowledge. 2 days later; panel was noted being liberated from the aircraft. The plane had flown approximately 12 legs prior to it being noticed missing.

Original NASA ASRS Text

Title: A B737 HAD A R-HAND WING SLAT ACCESS PANEL DEPART THE ACFT. DISCOVERED AFTER 12 LEGS FLOWN.

Narrative: I WAS ASSIGNED TO ACFT X R-HAND WING. I INSTALLED R-HAND WING SLAT PANEL PER THE MAINT MANUAL TO THE BEST OF MY KNOWLEDGE. 2 DAYS LATER; PANEL WAS NOTED BEING LIBERATED FROM THE ACFT. THE PLANE HAD FLOWN APPROX 12 LEGS PRIOR TO IT BEING NOTICED MISSING.

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.