A B757-200 was released from maintenance and returned with a pressurization leak. Found leak from panels with loose screws. Inspector inadvertently cleared panels as installed.

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Attributes
ACN	722995
Time
Date	200701
Local Time Of Day	1801 To 2400
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	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : inspector
Qualification	technician : airframe technician : powerplant
ASRS Report	722995
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact other
Consequence	other other
Factors
Maintenance	performance deficiency : logbook entry performance deficiency : non compliance with legal requirements performance deficiency : inspection
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

Nosewheel panels were removed for inspection; work card was stamped by me on all open and inspection blocks maintenance portion of work card. Block to install kept nosewheel panels 117AL and 117BL was stamped off by me in error. I did not install the panels listed in this step. Panels were installed by other (personnel) unknown. (Hardware) was loose causing panels to have (pressurization) leakage causing an air return for that first flight after heavy check was completed.

Original NASA ASRS Text

Title: A B757-200 WAS RELEASED FROM MAINT AND RETURNED WITH A PRESSURIZATION LEAK. FOUND LEAK FROM PANELS WITH LOOSE SCREWS. INSPECTOR INADVERTENTLY CLRED PANELS AS INSTALLED.

Narrative: NOSEWHEEL PANELS WERE REMOVED FOR INSPECTION; WORK CARD WAS STAMPED BY ME ON ALL OPEN AND INSPECTION BLOCKS MAINT PORTION OF WORK CARD. BLOCK TO INSTALL KEPT NOSEWHEEL PANELS 117AL AND 117BL WAS STAMPED OFF BY ME IN ERROR. I DID NOT INSTALL THE PANELS LISTED IN THIS STEP. PANELS WERE INSTALLED BY OTHER (PERSONNEL) UNKNOWN. (HARDWARE) WAS LOOSE CAUSING PANELS TO HAVE (PRESSURIZATION) LEAKAGE CAUSING AN AIR RETURN FOR THAT FIRST FLT AFTER HVY CHK WAS COMPLETED.

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.