An air carrier medium large transport leaves FL350 for FL360 after receiving a TCASII RA. The alert turned out to be a false alarm for an aircraft at FL270.

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Attributes
ACN	420147
Time
Date	199811
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zdc
State Reference	DC
Altitude	msl bound lower : 35000 msl bound upper : 36000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc tower : ind
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : instrument pilot : atp pilot : cfi pilot : commercial
Experience	flight time last 90 days : 240 flight time total : 16000 flight time type : 13000
ASRS Report	420147
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : cfi
Experience	flight time last 90 days : 250 flight time total : 19000 flight time type : 6000
ASRS Report	420525
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During cruise at FL350, TCASII commanded an RA to climb for traffic. TCASII indicated traffic 400 ft below us. Climbed aircraft to FL360 as commanded by TCASII RA. ZDC notified as soon as he got done with his current transmission. Center advised and confirmed the target traffic at FL270 (so TCASII warning false). Aircraft returned to FL350. ZDC frequency 124.02, wilmington sector 35.

Original NASA ASRS Text

Title: AN ACR MLG LEAVES FL350 FOR FL360 AFTER RECEIVING A TCASII RA. THE ALERT TURNED OUT TO BE A FALSE ALARM FOR AN ACFT AT FL270.

Narrative: DURING CRUISE AT FL350, TCASII COMMANDED AN RA TO CLB FOR TFC. TCASII INDICATED TFC 400 FT BELOW US. CLBED ACFT TO FL360 AS COMMANDED BY TCASII RA. ZDC NOTIFIED AS SOON AS HE GOT DONE WITH HIS CURRENT XMISSION. CTR ADVISED AND CONFIRMED THE TARGET TFC AT FL270 (SO TCASII WARNING FALSE). ACFT RETURNED TO FL350. ZDC FREQ 124.02, WILMINGTON SECTOR 35.

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.