A321 flight crew has unsafe gear indications; but lands without incident.

Attributes
ACN	703070
Time
Date	200607
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zzz.tracon
State Reference	US
Altitude	msl single value : 15000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 30000 flight time type : 2500
ASRS Report	703010
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : overcame equipment problem
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance Maintenance Human Performance
Primary Problem	Aircraft

Narrative:

Reset circuit breakers for lgciu (landing gear control indicator unit) #1 fault at direction of maintenance control. While on ground in ZZZ; after takeoff fault reappeared. The possibility existed that when lowering gear at destination that we might not have an indication as confirming down and locked. Prepared cabin for emergency landing and declared an emergency. Indications came on 'normal' followed by an uneventful landing.

Original NASA ASRS Text

Title: A321 FLT CREW HAS UNSAFE GEAR INDICATIONS; BUT LANDS WITHOUT INCIDENT.

Narrative: RESET CIRCUIT BREAKERS FOR LGCIU (LNDG GEAR CTL INDICATOR UNIT) #1 FAULT AT DIRECTION OF MAINT CTL. WHILE ON GND IN ZZZ; AFTER TKOF FAULT REAPPEARED. THE POSSIBILITY EXISTED THAT WHEN LOWERING GEAR AT DEST THAT WE MIGHT NOT HAVE AN INDICATION AS CONFIRMING DOWN AND LOCKED. PREPARED CABIN FOR EMER LNDG AND DECLARED AN EMER. INDICATIONS CAME ON 'NORMAL' FOLLOWED BY AN UNEVENTFUL LNDG.

Data retrieved from NASA's ASRS site as of January 2009 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.