TCASII in holding pattern.

Attributes
ACN	311394
Time
Date	199507
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lhr
State Reference	FO
Altitude	msl bound lower : 11000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bgm
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	other
Route In Use	enroute airway : lhr
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 210 flight time total : 18000 flight time type : 1500
ASRS Report	311394
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 7000 vertical : 1000
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation other

Narrative:

Approaching london after all-night flight from jfk we were given instructions to hold at ock as published. Upon entry to hold were given clearance to FL110 from FL120 and complied. Turning from teardrop entry to inbound leg got 'traffic' warning from TCASII and noted it as being at FL110. Acquired traffic visually at 1-2 O'clock and approximately 1-1 1/2 mi an air carrier md-11. At same time got RA alert to 'climb' and did so calling london control at same time to advise climbing in response to RA. Air carrier then reported descending to FL100 in response to RA. We believe air carrier was cleared to FL100 but for some reason had not complied in time to avoid traffic conflict. We were reclred to FL110 and landed uneventfully. TCASII worked appropriately and well. Was very glad it was available.

Original NASA ASRS Text

Title: TCASII IN HOLDING PATTERN.

Narrative: APCHING LONDON AFTER ALL-NIGHT FLT FROM JFK WE WERE GIVEN INSTRUCTIONS TO HOLD AT OCK AS PUBLISHED. UPON ENTRY TO HOLD WERE GIVEN CLRNC TO FL110 FROM FL120 AND COMPLIED. TURNING FROM TEARDROP ENTRY TO INBOUND LEG GOT 'TFC' WARNING FROM TCASII AND NOTED IT AS BEING AT FL110. ACQUIRED TFC VISUALLY AT 1-2 O'CLOCK AND APPROX 1-1 1/2 MI AN ACR MD-11. AT SAME TIME GOT RA ALERT TO 'CLB' AND DID SO CALLING LONDON CTL AT SAME TIME TO ADVISE CLBING IN RESPONSE TO RA. ACR THEN RPTED DSNDING TO FL100 IN RESPONSE TO RA. WE BELIEVE ACR WAS CLRED TO FL100 BUT FOR SOME REASON HAD NOT COMPLIED IN TIME TO AVOID TFC CONFLICT. WE WERE RECLRED TO FL110 AND LANDED UNEVENTFULLY. TCASII WORKED APPROPRIATELY AND WELL. WAS VERY GLAD IT WAS AVAILABLE.

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.