During gear extension on approach, an air carrier DC9-30 flight crew received gear warning horn and did not have a nose gear extended light. Go around was executed, and manual extension accomplished.

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Attributes
ACN	327407
Time
Date	199601
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	msl bound lower : 2000 msl bound upper : 2000
Aircraft 1
Controlling Facilities	tracon : dtw
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8000 flight time type : 4000
ASRS Report	327407
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem other other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On approach to dtw runway 27R, PF called for gear down. Switched to tower frequency. PF called for flaps 25 degrees and gear horn sounded. No nose gear green light. Turned nose gear landing light off and on, no change in illumination. Made a go around. Extended gear with manual extension system. Stowed manual extension lever after we had 3 green indications. Landed normally. Maintenance could not duplicate with the aircraft on jacks. Flushed hydraulic system, replaced landing gear selector valve as remedy.

Original NASA ASRS Text

Title: DURING GEAR EXTENSION ON APCH, AN ACR DC9-30 FLC RECEIVED GEAR WARNING HORN AND DID NOT HAVE A NOSE GEAR EXTENDED LIGHT. GAR WAS EXECUTED, AND MANUAL EXTENSION ACCOMPLISHED.

Narrative: ON APCH TO DTW RWY 27R, PF CALLED FOR GEAR DOWN. SWITCHED TO TWR FREQ. PF CALLED FOR FLAPS 25 DEGS AND GEAR HORN SOUNDED. NO NOSE GEAR GREEN LIGHT. TURNED NOSE GEAR LNDG LIGHT OFF AND ON, NO CHANGE IN ILLUMINATION. MADE A GAR. EXTENDED GEAR WITH MANUAL EXTENSION SYS. STOWED MANUAL EXTENSION LEVER AFTER WE HAD 3 GREEN INDICATIONS. LANDED NORMALLY. MAINT COULD NOT DUPLICATE WITH THE ACFT ON JACKS. FLUSHED HYD SYS, REPLACED LNDG GEAR SELECTOR VALVE AS REMEDY.

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.