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During descent from FL310 to FL290, air carrier X receives a TCASII RA at approximately FL300. ARTCC controller instructs air carrier X back up to maintain FL310.
| Attributes | |
| ACN | 406023 |
| Time | |
| Date | 199806 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : pye |
| State Reference | CA |
| Altitude | msl bound lower : 29000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : oak |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise other descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| 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 : 22000 flight time type : 5000 |
| ASRS Report | 406023 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 200 flight time total : 5600 flight time type : 4400 |
| ASRS Report | 405689 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 7000 vertical : 1100 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X msp/sfo was 75 NM northwest of pye, ATC cleared us from FL310 to FL290. We got an RA at approximately FL300 to climb. ATC then called us and said climb immediately back to FL310. Supplemental information from acn 405689: we climbed back to FL310 and reported to ATC what had just happened.
Original NASA ASRS Text
Title: DURING DSCNT FROM FL310 TO FL290, ACR X RECEIVES A TCASII RA AT APPROX FL300. ARTCC CTLR INSTRUCTS ACR X BACK UP TO MAINTAIN FL310.
Narrative: ACR X MSP/SFO WAS 75 NM NW OF PYE, ATC CLRED US FROM FL310 TO FL290. WE GOT AN RA AT APPROX FL300 TO CLB. ATC THEN CALLED US AND SAID CLB IMMEDIATELY BACK TO FL310. SUPPLEMENTAL INFO FROM ACN 405689: WE CLBED BACK TO FL310 AND RPTED TO ATC WHAT HAD JUST HAPPENED.
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.