Air carrier X unsafe gear indication made go around, had TCASII TA RA near midair collision with ATR...

Attributes
ACN	300758
Time
Date	199503
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lga
State Reference	NY
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lga
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	landing : go around other
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 140 flight time total : 20000 flight time type : 3000
ASRS Report	300758
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe conflict : nmac other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem
Consequence	Other
Miss Distance	horizontal : 0 vertical : 300
Supplementary
Primary Problem	Aircraft

Narrative:

Had landing gear unsafe indication in final turn. Tower had spacing problem. Not enough time to trouble-shoot gear problem. Tower told us to fly down runway at 2000 ft MSL. We did. Right over airport we got 'traffic' TCASII. Yellow spot in middle of several white readouts on screen. Then we got 'monitor vertical speed' showing 0-1200 ft in red on ivsi. Just then an ATR (aircraft Y) went under us, nearly head-on, approximately 300 ft below. We never saw the 0-1200 ivsi (climb) aircraft. Beat on gear handle until 3 red lights went out. Landed uneventfully. Gear problem was due to dirt/crud in handle switch contacts. Cleaned. Ok next flight.

Original NASA ASRS Text

Title: ACR X UNSAFE GEAR INDICATION MADE GAR, HAD TCASII TA RA NMAC WITH ATR.

Narrative: HAD LNDG GEAR UNSAFE INDICATION IN FINAL TURN. TWR HAD SPACING PROB. NOT ENOUGH TIME TO TROUBLE-SHOOT GEAR PROB. TWR TOLD US TO FLY DOWN RWY AT 2000 FT MSL. WE DID. RIGHT OVER ARPT WE GOT 'TFC' TCASII. YELLOW SPOT IN MIDDLE OF SEVERAL WHITE READOUTS ON SCREEN. THEN WE GOT 'MONITOR VERT SPD' SHOWING 0-1200 FT IN RED ON IVSI. JUST THEN AN ATR (ACFT Y) WENT UNDER US, NEARLY HEAD-ON, APPROX 300 FT BELOW. WE NEVER SAW THE 0-1200 IVSI (CLB) ACFT. BEAT ON GEAR HANDLE UNTIL 3 RED LIGHTS WENT OUT. LANDED UNEVENTFULLY. GEAR PROB WAS DUE TO DIRT/CRUD IN HANDLE SWITCH CONTACTS. CLEANED. OK NEXT FLT.

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.