A widebody transport air carrier pilot received a phantom TCASII alert in the traffic pattern.

Attributes
ACN	233970
Time
Date	199302
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ogg
State Reference	HI
Altitude	agl bound lower : 800 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : takeoff climbout : initial
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
ASRS Report	233970
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	faa : investigated
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Air carrier widebody transport departure off runway 2 at PM21. Approximately 2 mi off the departure end of the runway, widebody transport advised me he was receiving a TCASII alarm and asked me what the traffic was. He reported it in his 6 O'clock position, indicating 1000 ft. I told him that I did not have any traffic in that position nor did I see any. I then proceeded to tell him that the only traffic I was working was 2 mi northeast of the tower on a downwind to runway 2. Widebody transport again questioned me on the traffic. I told him again that the only traffic I had was now turning a right base to runway 2 and a helicopter that was already landing at the heliport. Widebody transport was then switched to the departure controller. He (widebody transport) then asked the honolulu cerap to get the tail number of the aircraft for him. The cerap called and asked me but I told them that since I did not know what aircraft widebody transport was talking about I could not furnish him with a tail number.

Original NASA ASRS Text

Title: A WDB ACR PLT RECEIVED A PHANTOM TCASII ALERT IN THE TFC PATTERN.

Narrative: ACR WDB DEP OFF RWY 2 AT PM21. APPROX 2 MI OFF THE DEP END OF THE RWY, WDB ADVISED ME HE WAS RECEIVING A TCASII ALARM AND ASKED ME WHAT THE TFC WAS. HE RPTED IT IN HIS 6 O'CLOCK POS, INDICATING 1000 FT. I TOLD HIM THAT I DID NOT HAVE ANY TFC IN THAT POS NOR DID I SEE ANY. I THEN PROCEEDED TO TELL HIM THAT THE ONLY TFC I WAS WORKING WAS 2 MI NE OF THE TWR ON A DOWNWIND TO RWY 2. WDB AGAIN QUESTIONED ME ON THE TFC. I TOLD HIM AGAIN THAT THE ONLY TFC I HAD WAS NOW TURNING A R BASE TO RWY 2 AND A HELI THAT WAS ALREADY LNDG AT THE HELIPORT. WDB WAS THEN SWITCHED TO THE DEP CTLR. HE (WDB) THEN ASKED THE HONOLULU CERAP TO GET THE TAIL NUMBER OF THE ACFT FOR HIM. THE CERAP CALLED AND ASKED ME BUT I TOLD THEM THAT SINCE I DID NOT KNOW WHAT ACFT WDB WAS TALKING ABOUT I COULD NOT FURNISH HIM WITH A TAIL NUMBER.

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.