Reporter inadvertently flew unairworthy aircraft.

Attributes
ACN	297247
Time
Date	199502
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 110 flight time total : 18000 flight time type : 6700
ASRS Report	297247
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe non adherence : far non adherence : published procedure
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

This pilot inadvertently flew aircraft in an unairworthy condition on a revenue flight leg from ord to stl (flight XXX - - feb/xx/95). Condition occurred because of a misinterp of MEL item 23-15 by maintenance and an illegal deferral of said item.

Original NASA ASRS Text

Title: RPTR INADVERTENTLY FLEW UNAIRWORTHY ACFT.

Narrative: THIS PLT INADVERTENTLY FLEW ACFT IN AN UNAIRWORTHY CONDITION ON A REVENUE FLT LEG FROM ORD TO STL (FLT XXX - - FEB/XX/95). CONDITION OCCURRED BECAUSE OF A MISINTERP OF MEL ITEM 23-15 BY MAINT AND AN ILLEGAL DEFERRAL OF SAID ITEM.

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.