Air carrier misses broken witness tape during preflight.

Attributes
ACN	450390
Time
Date	199909
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Flight Phase	ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
ASRS Report	450390
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine
Events
Anomaly	maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : company policies
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Problem Areas	Maintenance Human Performance Flight Crew Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

During the origination preflight we did not notice that the witness tape on the GPWS override switch was broken. We flew with it in that condition until landing where we noticed it and had it fixed.

Original NASA ASRS Text

Title: ACR MISSES BROKEN WITNESS TAPE DURING PREFLT.

Narrative: DURING THE ORIGINATION PREFLT WE DID NOT NOTICE THAT THE WITNESS TAPE ON THE GPWS OVERRIDE SWITCH WAS BROKEN. WE FLEW WITH IT IN THAT CONDITION UNTIL LNDG WHERE WE NOTICED IT AND HAD IT FIXED.

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.