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Air carrier receives TCASII RA. Indicates resolved before able to respond.
| Attributes | |
| ACN | 178711 |
| Time | |
| Date | 199105 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dll |
| State Reference | WI |
| Altitude | msl bound lower : 29000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : dca |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct enroute airway : zau |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 13000 |
| ASRS Report | 178711 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 3000 vertical : 650 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were flying from msp-bwi. Our route took us dells, J34. During our climb we were cleared, 'direct dells, fpr.' in the vicinity of the dells VOR within 6-7 mi DME the controller asked us if we were going direct bae. We replied that we were cleared dells, then fpr. Almost immediately we received a TCAS warning, 'traffic,' then an immediate 'climb' order. An intruder symbol appeared slightly left and before we could comply with the climb instruction. TCAS announced, 'conflict resolved.' we asked the controller about traffic and said we had a TCAS warning. He then complained that a wide turn at the VOR had caused the problem and that he had held traffic at FL280. We had received no prior information on traffic in the area. We believe that the other aircraft momentarily exceeded the assigned altitude causing the TCAS alert, and then went back to FL280. We never saw the other aircraft. This caused considerable excess heartbeats in our cockpit. I don't think this was a near miss, but with TCAS technology there will be more of these situations. From now on I will operate my TCAS equipment in a different manner. At altitudes where sep is less than 2000', in the 'on' rather than 'automatic' position. This would have given us adequate advance warning by providing a larger altitude window.
Original NASA ASRS Text
Title: ACR RECEIVES TCASII RA. INDICATES RESOLVED BEFORE ABLE TO RESPOND.
Narrative: WE WERE FLYING FROM MSP-BWI. OUR RTE TOOK US DELLS, J34. DURING OUR CLB WE WERE CLRED, 'DIRECT DELLS, FPR.' IN THE VICINITY OF THE DELLS VOR WITHIN 6-7 MI DME THE CTLR ASKED US IF WE WERE GOING DIRECT BAE. WE REPLIED THAT WE WERE CLRED DELLS, THEN FPR. ALMOST IMMEDIATELY WE RECEIVED A TCAS WARNING, 'TFC,' THEN AN IMMEDIATE 'CLB' ORDER. AN INTRUDER SYMBOL APPEARED SLIGHTLY LEFT AND BEFORE WE COULD COMPLY WITH THE CLB INSTRUCTION. TCAS ANNOUNCED, 'CONFLICT RESOLVED.' WE ASKED THE CTLR ABOUT TFC AND SAID WE HAD A TCAS WARNING. HE THEN COMPLAINED THAT A WIDE TURN AT THE VOR HAD CAUSED THE PROB AND THAT HE HAD HELD TFC AT FL280. WE HAD RECEIVED NO PRIOR INFO ON TFC IN THE AREA. WE BELIEVE THAT THE OTHER ACFT MOMENTARILY EXCEEDED THE ASSIGNED ALT CAUSING THE TCAS ALERT, AND THEN WENT BACK TO FL280. WE NEVER SAW THE OTHER ACFT. THIS CAUSED CONSIDERABLE EXCESS HEARTBEATS IN OUR COCKPIT. I DON'T THINK THIS WAS A NEAR MISS, BUT WITH TCAS TECHNOLOGY THERE WILL BE MORE OF THESE SITUATIONS. FROM NOW ON I WILL OPERATE MY TCAS EQUIP IN A DIFFERENT MANNER. AT ALTS WHERE SEP IS LESS THAN 2000', IN THE 'ON' RATHER THAN 'AUTO' POS. THIS WOULD HAVE GIVEN US ADEQUATE ADVANCE WARNING BY PROVIDING A LARGER ALT WINDOW.
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.