A B757-200 was dispatched with the APU oil cap not installed after oil servicing.

Attributes
ACN	685205
Time
Date	200601
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	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance ground : preflight
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance technician : 9
ASRS Report	685205
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation 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
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : installation performance deficiency : logbook entry performance deficiency : non compliance with legal requirements
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication Aircraft Environmental Factor
Primary Problem	Maintenance Human Performance

Narrative:

While servicing APU oil; I spilled oil on my jacket. Went to clean myself off and forgot to replace oil cap. Aircraft flew to ZZZ where APU had an automatic shutdown. ZZZ mechanic found oil cap off; svced APU oil. APU operated normal. I should have replaced oil cap before cleaning my jacket.

Original NASA ASRS Text

Title: A B757-200 WAS DISPATCHED WITH THE APU OIL CAP NOT INSTALLED AFTER OIL SVCING.

Narrative: WHILE SVCING APU OIL; I SPILLED OIL ON MY JACKET. WENT TO CLEAN MYSELF OFF AND FORGOT TO REPLACE OIL CAP. ACFT FLEW TO ZZZ WHERE APU HAD AN AUTO SHUTDOWN. ZZZ MECH FOUND OIL CAP OFF; SVCED APU OIL. APU OPERATED NORMAL. I SHOULD HAVE REPLACED OIL CAP BEFORE CLEANING MY JACKET.

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.