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Flight crew of an medium large transport air carrier aircraft descended below assigned arrival altitude in response to a TCASII RA.
| Attributes | |
| ACN | 247702 |
| Time | |
| Date | 199307 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : btg |
| State Reference | WA |
| Altitude | msl bound lower : 15300 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : mlb |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zse |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | climbout : intermediate altitude |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 15000 flight time type : 1800 |
| ASRS Report | 247702 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 220 flight time total : 1800 flight time type : 220 |
| ASRS Report | 247696 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 1500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After level off at 16000 ft on the moxee 2 arrival into pdx from eug, noticed traffic both visually and on TCASII. Received TA from TCASII. Aircraft appeared to be climbing (a light twin) and TCASII showed him plus 200 ft. Then received an RA to descend. Followed company procedure and initiated descent per TCASII to 15300 ft, advised ATC (ZSE 125.8) and returned to 16000 ft after clear of conflict.
Original NASA ASRS Text
Title: FLC OF AN MLG ACR ACFT DSNDED BELOW ASSIGNED ARR ALT IN RESPONSE TO A TCASII RA.
Narrative: AFTER LEVEL OFF AT 16000 FT ON THE MOXEE 2 ARR INTO PDX FROM EUG, NOTICED TFC BOTH VISUALLY AND ON TCASII. RECEIVED TA FROM TCASII. ACFT APPEARED TO BE CLBING (A LIGHT TWIN) AND TCASII SHOWED HIM PLUS 200 FT. THEN RECEIVED AN RA TO DSND. FOLLOWED COMPANY PROC AND INITIATED DSCNT PER TCASII TO 15300 FT, ADVISED ATC (ZSE 125.8) AND RETURNED TO 16000 FT AFTER CLR OF CONFLICT.
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.