Flight crew of medium large transport on approach to lga lost communication on 1 frequency, resorted to alternate frequency. Traffic advisory given, less than standard separation.

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Attributes
ACN	127900
Time
Date	198911
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lga
State Reference	NY
Altitude	msl bound lower : 3400 msl bound upper : 4000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach descent other
Route In Use	approach : visual enroute : on vectors
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 140 flight time total : 14000 flight time type : 3500
ASRS Report	127900
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 210 flight time total : 4500 flight time type : 600
ASRS Report	128008
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 5300 vertical : 600
Supplementary
Primary Problem	Navigational Facility
Air Traffic Incident	other

Narrative:

While being vectored for an ILS to runway 22 at lga, N90 approach control had an apparent radio failure on 134.90 MHZ. First officer was attempting to reestablish contact on 134.90, while I attempted and established contact with N90 on 120.80. Controller on 120.80 asked us to try 134.90 again, and I advised controller that the frequency was out. We could hear other aircraft on 134.90, but no contact with controller, as first officer was still attempting to make contact on 134.90 on #2 radio. Controller on 120.80 cleared us to descend to 3000' and turn to heading 180 degrees immediately. I initiated the turn and descent at the same time. At this time, we were VMC and spotted traffic 600-800' above us and 3/4-1 mi away. We provided our own sep visually from the traffic in question. We were then cleared for the visibility approach to runway 22.

Original NASA ASRS Text

Title: FLT CREW OF MLG ON APCH TO LGA LOST COM ON 1 FREQ, RESORTED TO ALTERNATE FREQ. TRAFFIC ADVISORY GIVEN, LESS THAN STANDARD SEPARATION.

Narrative: WHILE BEING VECTORED FOR AN ILS TO RWY 22 AT LGA, N90 APCH CTL HAD AN APPARENT RADIO FAILURE ON 134.90 MHZ. F/O WAS ATTEMPTING TO REESTABLISH CONTACT ON 134.90, WHILE I ATTEMPTED AND ESTABLISHED CONTACT WITH N90 ON 120.80. CTLR ON 120.80 ASKED US TO TRY 134.90 AGAIN, AND I ADVISED CTLR THAT THE FREQ WAS OUT. WE COULD HEAR OTHER ACFT ON 134.90, BUT NO CONTACT WITH CTLR, AS F/O WAS STILL ATTEMPTING TO MAKE CONTACT ON 134.90 ON #2 RADIO. CTLR ON 120.80 CLRED US TO DSND TO 3000' AND TURN TO HDG 180 DEGS IMMEDIATELY. I INITIATED THE TURN AND DSCNT AT THE SAME TIME. AT THIS TIME, WE WERE VMC AND SPOTTED TFC 600-800' ABOVE US AND 3/4-1 MI AWAY. WE PROVIDED OUR OWN SEP VISUALLY FROM THE TFC IN QUESTION. WE WERE THEN CLRED FOR THE VIS APCH TO RWY 22.

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.