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Super MD80 in descent to FL250 encounters TCASII RA, traffic 4000 ft below. First officer, reporter, was out of the cockpit during the event and did not observe the occurrence.
| Attributes | |
| ACN | 361510 |
| Time | |
| Date | 199702 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : esl |
| State Reference | WV |
| Altitude | msl bound lower : 25000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other |
| Route In Use | arrival star : star enroute airway : zdc |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| ASRS Report | 361510 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe conflict : airborne less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | aircraft : equipment problem dissipated other |
| Consequence | Other |
| Miss Distance | vertical : 4000 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Location: on descent of the arrival approach into washington, somewhere around kessel VOR, at FL250 as stated by the captain. As the first officer on this flight, I do not know the details of RA occurrence on the TCASII. I was out of the cockpit during the time of the event, using the lavatory prior to the descent. When I came back into the cockpit, the captain had mentioned that he had begun the descent per ATC instructions and during the level off, or thereabouts, he got an RA warning on the TCASII. He stated the other aircraft was 4000 ft below us, but he got the warning anyway. Since I was not in the cockpit during that specific moment, I cannot state any further details.
Original NASA ASRS Text
Title: SUPER MD80 IN DSCNT TO FL250 ENCOUNTERS TCASII RA, TFC 4000 FT BELOW. FO, RPTR, WAS OUT OF THE COCKPIT DURING THE EVENT AND DID NOT OBSERVE THE OCCURRENCE.
Narrative: LOCATION: ON DSCNT OF THE ARR APCH INTO WASHINGTON, SOMEWHERE AROUND KESSEL VOR, AT FL250 AS STATED BY THE CAPT. AS THE FO ON THIS FLT, I DO NOT KNOW THE DETAILS OF RA OCCURRENCE ON THE TCASII. I WAS OUT OF THE COCKPIT DURING THE TIME OF THE EVENT, USING THE LAVATORY PRIOR TO THE DSCNT. WHEN I CAME BACK INTO THE COCKPIT, THE CAPT HAD MENTIONED THAT HE HAD BEGUN THE DSCNT PER ATC INSTRUCTIONS AND DURING THE LEVEL OFF, OR THEREABOUTS, HE GOT AN RA WARNING ON THE TCASII. HE STATED THE OTHER ACFT WAS 4000 FT BELOW US, BUT HE GOT THE WARNING ANYWAY. SINCE I WAS NOT IN THE COCKPIT DURING THAT SPECIFIC MOMENT, I CANNOT STATE ANY FURTHER DETAILS.
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.