An air carrier B727 flight crew noted that the right main landing gear 'green' light did not illuminate when the gear was extended. The 'dim' position of the indicator had failed and after confirming that the gear was properly extended, the flight crew made a normal landing.

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Attributes
ACN	385710
Time
Date	199711
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	agl bound lower : 1200 agl bound upper : 1200
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : dtw tracon : bur
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing : go around landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 15000 flight time type : 6000
ASRS Report	385710
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Short final runway 21C dtw, gear was extended. The right main green light did not illuminate, but there was no red 'unsafe' light. After a go around, the manual was consulted, and cockpit lighting turned up, along with the master warning light switch. With that switch in bright, the gear light functioned normally, and the approach was resumed, and the landing accomplished.

Original NASA ASRS Text

Title: AN ACR B727 FLC NOTED THAT THE R MAIN LNDG GEAR 'GREEN' LIGHT DID NOT ILLUMINATE WHEN THE GEAR WAS EXTENDED. THE 'DIM' POS OF THE INDICATOR HAD FAILED AND AFTER CONFIRMING THAT THE GEAR WAS PROPERLY EXTENDED, THE FLC MADE A NORMAL LNDG.

Narrative: SHORT FINAL RWY 21C DTW, GEAR WAS EXTENDED. THE R MAIN GREEN LIGHT DID NOT ILLUMINATE, BUT THERE WAS NO RED 'UNSAFE' LIGHT. AFTER A GAR, THE MANUAL WAS CONSULTED, AND COCKPIT LIGHTING TURNED UP, ALONG WITH THE MASTER WARNING LIGHT SWITCH. WITH THAT SWITCH IN BRIGHT, THE GEAR LIGHT FUNCTIONED NORMALLY, AND THE APCH WAS RESUMED, AND THE LNDG ACCOMPLISHED.

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.