Landed with no green light showing for left main gear.

Attributes
ACN	233708
Time
Date	199302
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bwi
State Reference	MD
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bwi
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6000 flight time type : 400
ASRS Report	233708
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure non adherence other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Extended landing gear. No down indication on left main gear. Executed go around, asked tower to check gear visually. ATC advises normal gear. Conducted checklist for no gear indication. We learned that backup indicators showed all 3 gear normal. Flight attendant reported normal gear. Declared emergency and returned for landing. Landing, rollout, and taxi normal. Maintenance, on inspection, confirmed light bulbs inoperative in left main gear indicator.

Original NASA ASRS Text

Title: LANDED WITH NO GREEN LIGHT SHOWING FOR L MAIN GEAR.

Narrative: EXTENDED LNDG GEAR. NO DOWN INDICATION ON L MAIN GEAR. EXECUTED GAR, ASKED TWR TO CHK GEAR VISUALLY. ATC ADVISES NORMAL GEAR. CONDUCTED CHKLIST FOR NO GEAR INDICATION. WE LEARNED THAT BACKUP INDICATORS SHOWED ALL 3 GEAR NORMAL. FLT ATTENDANT RPTED NORMAL GEAR. DECLARED EMER AND RETURNED FOR LNDG. LNDG, ROLLOUT, AND TAXI NORMAL. MAINT, ON INSPECTION, CONFIRMED LIGHT BULBS INOP IN L MAIN GEAR INDICATOR.

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.