A DC9-30 on approach at 3000 ft declared an emergency due to a nose landing gear unsafe light caused by a failed nose gear position sensor.

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Attributes
ACN	398715
Time
Date	199804
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : buf
State Reference	NY
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : buf
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Flight Phase	descent : approach other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 6000 flight time type : 800
ASRS Report	398715
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Experienced unsafe nose gear indication when gear lowered for landing at buf. Went through procedure, declared emergency, visually confirmed from cockpit viewer that nose gear was down and locked. Landed at buf without incident. I don't think we broke any rules, but I'm submitting this as a precaution. Callback conversation with reporter revealed the following information: the reporter stated the aircraft was a DC9-30 and the nose gear unsafe light was caused by a failed nose landing gear position sensor.

Original NASA ASRS Text

Title: A DC9-30 ON APCH AT 3000 FT DECLARED AN EMER DUE TO A NOSE LNDG GEAR UNSAFE LIGHT CAUSED BY A FAILED NOSE GEAR POS SENSOR.

Narrative: EXPERIENCED UNSAFE NOSE GEAR INDICATION WHEN GEAR LOWERED FOR LNDG AT BUF. WENT THROUGH PROC, DECLARED EMER, VISUALLY CONFIRMED FROM COCKPIT VIEWER THAT NOSE GEAR WAS DOWN AND LOCKED. LANDED AT BUF WITHOUT INCIDENT. I DON'T THINK WE BROKE ANY RULES, BUT I'M SUBMITTING THIS AS A PRECAUTION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS A DC9-30 AND THE NOSE GEAR UNSAFE LIGHT WAS CAUSED BY A FAILED NOSE LNDG GEAR POS SENSOR.

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.