A B737-300 crew experienced a nose gear unsafe light with gear up or down and returned to departure airport after declaring an emergency.

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Attributes
ACN	637774
Time
Date	200411
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zzz.artcc
State Reference	US
Altitude	msl single value : 23000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 250 flight time total : 17000 flight time type : 7500
ASRS Report	637774
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 250 flight time total : 12000 flight time type : 1500
ASRS Report	637775
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : land gear warning lights
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On departure from ZZZ, first officer flying, nose gear in-transit red gear light did not go out on gear retraction. After reaching safe altitude, we contacted dispatch and maintenance who had us cycle gear/reset some circuit breakers but nothing helped. When gear extended, red light stayed on and we did not get green down and locked light. We did determine through gear view port that arrows were aligned indicating gear was down and locked. We decided to return to ZZZ. I asked for fire equipment to stand by, just as a precaution, even though this appeared to be an indication problem -- not an actual gear problem. I explained situation to passenger and to expect normal landing and that trucks there as only precaution. Flight attendants given an 'advisory.' we landed normal and after coming to stop had first officer call ZZZ maintenance to come out and put gear pin in place, then we taxied to gate. Supplemental information from acn 637775: the captain consulted myself and dispatch and we decided to return to ZZZ even though maintenance was ok with us continuing. We felt the best airport and help was at ZZZ even though we were confident that the gear was down.

Original NASA ASRS Text

Title: A B737-300 CREW EXPERIENCED A NOSE GEAR UNSAFE LIGHT WITH GEAR UP OR DOWN AND RETURNED TO DEP ARPT AFTER DECLARING AN EMER.

Narrative: ON DEP FROM ZZZ, FO FLYING, NOSE GEAR IN-TRANSIT RED GEAR LIGHT DID NOT GO OUT ON GEAR RETRACTION. AFTER REACHING SAFE ALT, WE CONTACTED DISPATCH AND MAINT WHO HAD US CYCLE GEAR/RESET SOME CIRCUIT BREAKERS BUT NOTHING HELPED. WHEN GEAR EXTENDED, RED LIGHT STAYED ON AND WE DID NOT GET GREEN DOWN AND LOCKED LIGHT. WE DID DETERMINE THROUGH GEAR VIEW PORT THAT ARROWS WERE ALIGNED INDICATING GEAR WAS DOWN AND LOCKED. WE DECIDED TO RETURN TO ZZZ. I ASKED FOR FIRE EQUIP TO STAND BY, JUST AS A PRECAUTION, EVEN THOUGH THIS APPEARED TO BE AN INDICATION PROB -- NOT AN ACTUAL GEAR PROB. I EXPLAINED SIT TO PAX AND TO EXPECT NORMAL LNDG AND THAT TRUCKS THERE AS ONLY PRECAUTION. FLT ATTENDANTS GIVEN AN 'ADVISORY.' WE LANDED NORMAL AND AFTER COMING TO STOP HAD FO CALL ZZZ MAINT TO COME OUT AND PUT GEAR PIN IN PLACE, THEN WE TAXIED TO GATE. SUPPLEMENTAL INFO FROM ACN 637775: THE CAPT CONSULTED MYSELF AND DISPATCH AND WE DECIDED TO RETURN TO ZZZ EVEN THOUGH MAINT WAS OK WITH US CONTINUING. WE FELT THE BEST ARPT AND HELP WAS AT ZZZ EVEN THOUGH WE WERE CONFIDENT THAT THE GEAR WAS DOWN.

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.