An EMB140 was found on arrival to have the APU oil service door missing.

Attributes
ACN	692078
Time
Date	200603
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 140 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	692078
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other other : 2
Resolutory Action	none taken : detected after the fact
Consequence	other other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance performance deficiency : inspection
Supplementary
Problem Areas	Environmental Factor Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

I was assigned an inspection. Part of this inspection involves opening access panel 313CL which is the APU oil service door. Upon completion of work in this area; I closed the door and checked to make sure each latch (there are 5 individual latches on this particular door) was closed. I do not know why the event occurred. If any of the latches on door 313CL were in fact not closed; they would have been noticed on the pilots preflight walkaround inspection; and also by the ramp crew since this area is not hidden; and is in plain view. I cannot speculate as to why this event occurred; other than an act of god or a multiple latch failure of some kind.

Original NASA ASRS Text

Title: AN EMB140 WAS FOUND ON ARR TO HAVE THE APU OIL SVC DOOR MISSING.

Narrative: I WAS ASSIGNED AN INSPECTION. PART OF THIS INSPECTION INVOLVES OPENING ACCESS PANEL 313CL WHICH IS THE APU OIL SVC DOOR. UPON COMPLETION OF WORK IN THIS AREA; I CLOSED THE DOOR AND CHKED TO MAKE SURE EACH LATCH (THERE ARE 5 INDIVIDUAL LATCHES ON THIS PARTICULAR DOOR) WAS CLOSED. I DO NOT KNOW WHY THE EVENT OCCURRED. IF ANY OF THE LATCHES ON DOOR 313CL WERE IN FACT NOT CLOSED; THEY WOULD HAVE BEEN NOTICED ON THE PLTS PREFLT WALKAROUND INSPECTION; AND ALSO BY THE RAMP CREW SINCE THIS AREA IS NOT HIDDEN; AND IS IN PLAIN VIEW. I CANNOT SPECULATE AS TO WHY THIS EVENT OCCURRED; OTHER THAN AN ACT OF GOD OR A MULTIPLE LATCH FAILURE OF SOME KIND.

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.