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Near midair collision sensed by TCASII RA on opposite direction climbing traffic. Altitude excursion.
| Attributes | |
| ACN | 267733 |
| Time | |
| Date | 199404 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : djb |
| State Reference | PA |
| Altitude | msl bound lower : 24000 msl bound upper : 24900 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 10000 flight time type : 4000 |
| ASRS Report | 267733 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 20000 flight time type : 4000 |
| ASRS Report | 267972 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | other Other |
| Miss Distance | horizontal : 1500 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
TCASII gave an RA maximum climb on traffic reported by ZOB 127.4 at XX25Z apr/fri/94. We were level at FL240 and traffic opposite direction at FL230. Saw on TCASII, -9 then target started to climb, -7, -6, alert went off commanding conflict climb 1700 plus rate. An immediate climb was executed, forcing 2 flight attendants to the floor. Seat belt was already on due to continued light turbulence. Everyone seated, no injuries. A320 aircraft flight dca to dtw. Captain, first officer, saw -2 on TCASII before divergence. Supplemental information from acn 267972: TCASII was functioning properly and alerted us to a danger we would not have seen otherwise.
Original NASA ASRS Text
Title: NMAC SENSED BY TCASII RA ON OPPOSITE DIRECTION CLBING TFC. ALT EXCURSION.
Narrative: TCASII GAVE AN RA MAX CLB ON TFC RPTED BY ZOB 127.4 AT XX25Z APR/FRI/94. WE WERE LEVEL AT FL240 AND TFC OPPOSITE DIRECTION AT FL230. SAW ON TCASII, -9 THEN TARGET STARTED TO CLB, -7, -6, ALERT WENT OFF COMMANDING CONFLICT CLB 1700 PLUS RATE. AN IMMEDIATE CLB WAS EXECUTED, FORCING 2 FLT ATTENDANTS TO THE FLOOR. SEAT BELT WAS ALREADY ON DUE TO CONTINUED LIGHT TURB. EVERYONE SEATED, NO INJURIES. A320 ACFT FLT DCA TO DTW. CAPT, FO, SAW -2 ON TCASII BEFORE DIVERGENCE. SUPPLEMENTAL INFO FROM ACN 267972: TCASII WAS FUNCTIONING PROPERLY AND ALERTED US TO A DANGER WE WOULD NOT HAVE SEEN OTHERWISE.
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.