A B767-300 was dispatched with the auxiliary power unit oil cap not installed and secured.

Attributes
ACN	407993
Time
Date	199807
Day	Thu
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Night
Aircraft 1
Controlling Facilities	tracon : sba
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	407993
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : less severe non adherence : far non adherence : published procedure
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

On the morning of jul/xx/98, I was assigned to leak check the APU on aircraft xyz. I found the oil to be low, I added oil. When the oil overflowed, I stepped down to get a couple of mop heads to clean up the oil. In the process I apparently left the oil cap off.

Original NASA ASRS Text

Title: A B767-300 WAS DISPATCHED WITH THE AUX PWR UNIT OIL CAP NOT INSTALLED AND SECURED.

Narrative: ON THE MORNING OF JUL/XX/98, I WAS ASSIGNED TO LEAK CHK THE APU ON ACFT XYZ. I FOUND THE OIL TO BE LOW, I ADDED OIL. WHEN THE OIL OVERFLOWED, I STEPPED DOWN TO GET A COUPLE OF MOP HEADS TO CLEAN UP THE OIL. IN THE PROCESS I APPARENTLY LEFT THE OIL CAP OFF.

Data retrieved from NASA's ASRS site as of July 2007 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.