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B727 climbs 900 ft above assigned altitude when it is bumped up by another aircraft climbing beneath it causing a TCASII RA.
| Attributes | |
| ACN | 351900 |
| Time | |
| Date | 199611 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 11000 msl bound upper : 11900 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 351900 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 351899 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On bonham 1 (BYP1) arrival to dfw from mci while on the dfw 037 degree radial at about 12 DME received a TA for traffic at about 2 O'clock and about 2000 ft below us. We were IMC at the time and could not see the traffic. Shortly there after we received an RA for the same contact and followed the ivsi to climb. Climbed from 11000 ft to 11900 ft before receiving clear of conflict. Contact had leveled at 10000 ft as they were apparently on departure from dfw. Advised ATC immediately and advised them that we were descending now to 11000 ft. ATC acknowledged and cleared us to 6000 ft. The TA appeared to have been a bump up from a dfw departure. There was no apparent conflict with any traffic observed at any time.
Original NASA ASRS Text
Title: B727 CLBS 900 FT ABOVE ASSIGNED ALT WHEN IT IS BUMPED UP BY ANOTHER ACFT CLBING BENEATH IT CAUSING A TCASII RA.
Narrative: ON BONHAM 1 (BYP1) ARR TO DFW FROM MCI WHILE ON THE DFW 037 DEG RADIAL AT ABOUT 12 DME RECEIVED A TA FOR TFC AT ABOUT 2 O'CLOCK AND ABOUT 2000 FT BELOW US. WE WERE IMC AT THE TIME AND COULD NOT SEE THE TFC. SHORTLY THERE AFTER WE RECEIVED AN RA FOR THE SAME CONTACT AND FOLLOWED THE IVSI TO CLB. CLBED FROM 11000 FT TO 11900 FT BEFORE RECEIVING CLR OF CONFLICT. CONTACT HAD LEVELED AT 10000 FT AS THEY WERE APPARENTLY ON DEP FROM DFW. ADVISED ATC IMMEDIATELY AND ADVISED THEM THAT WE WERE DSNDING NOW TO 11000 FT. ATC ACKNOWLEDGED AND CLRED US TO 6000 FT. THE TA APPEARED TO HAVE BEEN A BUMP UP FROM A DFW DEP. THERE WAS NO APPARENT CONFLICT WITH ANY TFC OBSERVED AT ANY TIME.
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.