Medium large transport experiences gear unsafe light, unable to resolve the anomaly, lands safely.

Attributes
ACN	129539
Time
Date	198911
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pit
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pit
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : takeoff landing other 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 : 240 flight time total : 17500 flight time type : 2000
ASRS Report	129539
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 6000 flight time type : 50
ASRS Report	129541
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa other other : unspecified cockpit
Resolutory Action	flight crew : overcame equipment problem flight crew : declared emergency
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

On takeoff with gear retraction, got nose gear red unsafe light. Recycled gear. Got no nose gear light, only 'red'. Recycled a few more times, same indication. Did abnormal procedure in book. Also did fly by. Tower advised gear looked down. However, was not getting 'laws' aural warning that gear was not down. Pin looked normal. Decided to declare emergency, came back around for normal landing. Maintenance could not find problem, cancelled flight. Took aircraft to hangar.

Original NASA ASRS Text

Title: MLG EXPERIENCES GEAR UNSAFE LIGHT, UNABLE TO RESOLVE THE ANOMALY, LANDS SAFELY.

Narrative: ON TKOF WITH GEAR RETRACTION, GOT NOSE GEAR RED UNSAFE LIGHT. RECYCLED GEAR. GOT NO NOSE GEAR LIGHT, ONLY 'RED'. RECYCLED A FEW MORE TIMES, SAME INDICATION. DID ABNORMAL PROC IN BOOK. ALSO DID FLY BY. TWR ADVISED GEAR LOOKED DOWN. HOWEVER, WAS NOT GETTING 'LAWS' AURAL WARNING THAT GEAR WAS NOT DOWN. PIN LOOKED NORMAL. DECIDED TO DECLARE EMER, CAME BACK AROUND FOR NORMAL LNDG. MAINT COULD NOT FIND PROBLEM, CANCELLED FLT. TOOK ACFT TO HANGAR.

Data retrieved from NASA's ASRS site as of August 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.