Land without clearance. Aircraft equipment problem on final approach distraction flight crew. A false overspd warning for flap confign sounded alert. Speed confirmed as correct, but forgot to contact tower.

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Attributes
ACN	342300
Time
Date	199607
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : orf 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	ATR 42
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp pilot : cfi
Experience	flight time last 90 days : 180 flight time total : 7500 flight time type : 2500
ASRS Report	342300
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	incursion : landing without clearance non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We had called traffic we were following in sight, and were cleared for visual approach behind him by ATC. During descent, an erroneous overspd warning sounded for flap overspd. We confirmed speed was ok, continued descent and landed. Upon taxiing clear of runway, we realized that we had not contacted tower for landing clearance.

Original NASA ASRS Text

Title: LAND WITHOUT CLRNC. ACFT EQUIP PROB ON FINAL APCH DISTR FLC. A FALSE OVERSPD WARNING FOR FLAP CONFIGN SOUNDED ALERT. SPD CONFIRMED AS CORRECT, BUT FORGOT TO CONTACT TWR.

Narrative: WE HAD CALLED TFC WE WERE FOLLOWING IN SIGHT, AND WERE CLRED FOR VISUAL APCH BEHIND HIM BY ATC. DURING DSCNT, AN ERRONEOUS OVERSPD WARNING SOUNDED FOR FLAP OVERSPD. WE CONFIRMED SPD WAS OK, CONTINUED DSCNT AND LANDED. UPON TAXIING CLR OF RWY, WE REALIZED THAT WE HAD NOT CONTACTED TWR FOR LNDG CLRNC.

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.