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Light transport non adherence to ATC instruction aircraft equipment problem erroneous mode C caused air carrier X TCASII RA climb. Air carrier X had less than standard separation from light transport. Pilot deviation.
| Attributes | |
| ACN | 221754 |
| Time | |
| Date | 199209 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mco |
| State Reference | FL |
| Altitude | msl bound lower : 27000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx tower : bet |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 8000 flight time type : 2000 |
| ASRS Report | 221754 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 2500 |
| ASRS Report | 221849 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 6000 vertical : 400 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X at 27000 ft cruise altitude on the mco 309 degree radial at 85 DME approximately over cross city. We had a TCASII RA and responded with a climb to 27600 ft. The TCASII showed a TA at 9 O'clock with an aural 'traffic' call warning. ATC was notified but at the same time we received an RA with an aural 'climb' command given by the TCASII. We were unable to locate the traffic visually so a climb was initiated and ATC was informed. We climbed to 27600 ft and then descended back down to 27000 ft. At the time we were climbing, ATC stated that the traffic was at 28000 ft. Our TCASII showed the traffic at 400 ft below our altitude (26600 ft). ATC advised an altitude deviation would be filed. The captain called ATC by phone and was told that the traffic was an light transport. ATC also informed us that the light transport's transponder mode C had malfunctioned earlier when he leveled at 15000 ft it showed him at 13500 ft (1500 ft lower than he was). We were told he was supposed to have his mode C turned off but it was obviously on for us to receive a TCASII warning (RA).
Original NASA ASRS Text
Title: LTT NON ADHERENCE TO ATC INSTRUCTION ACFT EQUIP PROB ERRONEOUS MODE C CAUSED ACR X TCASII RA CLB. ACR X HAD LTSS FROM LTT. PLTDEV.
Narrative: ACR X AT 27000 FT CRUISE ALT ON THE MCO 309 DEG RADIAL AT 85 DME APPROX OVER CROSS CITY. WE HAD A TCASII RA AND RESPONDED WITH A CLB TO 27600 FT. THE TCASII SHOWED A TA AT 9 O'CLOCK WITH AN AURAL 'TFC' CALL WARNING. ATC WAS NOTIFIED BUT AT THE SAME TIME WE RECEIVED AN RA WITH AN AURAL 'CLB' COMMAND GIVEN BY THE TCASII. WE WERE UNABLE TO LOCATE THE TFC VISUALLY SO A CLB WAS INITIATED AND ATC WAS INFORMED. WE CLBED TO 27600 FT AND THEN DSNDED BACK DOWN TO 27000 FT. AT THE TIME WE WERE CLBING, ATC STATED THAT THE TFC WAS AT 28000 FT. OUR TCASII SHOWED THE TFC AT 400 FT BELOW OUR ALT (26600 FT). ATC ADVISED AN ALTDEV WOULD BE FILED. THE CAPT CALLED ATC BY PHONE AND WAS TOLD THAT THE TFC WAS AN LTT. ATC ALSO INFORMED US THAT THE LTT'S XPONDER MODE C HAD MALFUNCTIONED EARLIER WHEN HE LEVELED AT 15000 FT IT SHOWED HIM AT 13500 FT (1500 FT LOWER THAN HE WAS). WE WERE TOLD HE WAS SUPPOSED TO HAVE HIS MODE C TURNED OFF BUT IT WAS OBVIOUSLY ON FOR US TO RECEIVE A TCASII WARNING (RA).
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.