An EMB145 was dispatched after #1 engine oil service. Door departed the aircraft in flight.

Attributes
ACN	696478
Time
Date	200605
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 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
ASRS Report	696478
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance
Independent Detector	other other : 2
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	performance deficiency : inspection
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Environmental Factor
Primary Problem	Maintenance Human Performance

Narrative:

I was manning gate X. Aircraft #1 engine required oil service. I svced #1 engine with oil and secured the access door. To the best of my knowledge the door was secured but when the aircraft reached its destination the access door was missing.

Original NASA ASRS Text

Title: AN EMB145 WAS DISPATCHED AFTER #1 ENG OIL SVC. DOOR DEPARTED THE ACFT IN FLT.

Narrative: I WAS MANNING GATE X. ACFT #1 ENG REQUIRED OIL SVC. I SVCED #1 ENG WITH OIL AND SECURED THE ACCESS DOOR. TO THE BEST OF MY KNOWLEDGE THE DOOR WAS SECURED BUT WHEN THE ACFT REACHED ITS DEST THE ACCESS DOOR WAS 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.