A B737-500 right center boost pump access panel # 7401 found missing after aircraft arrival.

Attributes
ACN	756230
Time
Date	200709
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-500
Operating Under FAR Part	Part 121
Flight Phase	ground : parked ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance lead technician : 7 maintenance technician : 20
ASRS Report	756230
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	performance deficiency : inspection performance deficiency : non compliance with legal requirements performance deficiency : installation
Supplementary
Problem Areas	Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Aircraft xx arrived in XXX with right center boost pump access panel missing (panel 7401); reference log page XXX. I removed the panel the previous night to troubleshoot the inoperative boost pump; reference log page XXX. I installed panel after troubleshoot pump; and tightened and aligned fastener indicators perpendicular to panels edge as per maintenance manual. After putting up tools I inspected area and double-checked panel indicators and security.

Original NASA ASRS Text

Title: A B737-500 RIGHT CENTER BOOST PUMP ACCESS PANEL # 7401 FOUND MISSING AFTER ACFT ARRIVAL.

Narrative: ACFT XX ARRIVED IN XXX WITH R CTR BOOST PUMP ACCESS PANEL MISSING (PANEL 7401); REF LOG PAGE XXX. I REMOVED THE PANEL THE PREVIOUS NIGHT TO TROUBLESHOOT THE INOP BOOST PUMP; REF LOG PAGE XXX. I INSTALLED PANEL AFTER TROUBLESHOOT PUMP; AND TIGHTENED AND ALIGNED FASTENER INDICATORS PERPENDICULAR TO PANELS EDGE AS PER MAINT MANUAL. AFTER PUTTING UP TOOLS I INSPECTED AREA AND DOUBLE-CHKED PANEL INDICATORS AND SECURITY.

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.