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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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B727 flight crew climb to FL270 stopped at FL220 by ATC. ATC then issued a vector heading. Complying with heading change, a TCASII TA activated, with subsequent TCASII RA climb command. PIC reports conflict with unknown air carrier cleared when level at FL250. ATC issued new clearance climb to FL270. PIC states that during event, new controller intervened, possibly training instructor.
| Attributes | |
| ACN | 391500 |
| Time | |
| Date | 199801 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : mth |
| State Reference | FL |
| Altitude | msl bound lower : 22000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 270 flight time total : 11200 flight time type : 3000 |
| ASRS Report | 391500 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 24000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Radar vectors assigned, climbing to FL270. ATC instructed us to stop climb at FL220 -- complied. Then given heading of 180 degrees. While in turn, TCASII TA, then RA command to climb. Cleared conflict at FL250. While returning to FL220, ATC requested a climb to FL270. Conflict resolved with minimum separation of 4 NM. ATC controller's voice changed from female to male during episode. Believe ATC training was in progress.
Original NASA ASRS Text
Title: B727 FLC CLB TO FL270 STOPPED AT FL220 BY ATC. ATC THEN ISSUED A VECTOR HDG. COMPLYING WITH HDG CHANGE, A TCASII TA ACTIVATED, WITH SUBSEQUENT TCASII RA CLB COMMAND. PIC RPTS CONFLICT WITH UNKNOWN ACR CLRED WHEN LEVEL AT FL250. ATC ISSUED NEW CLRNC CLB TO FL270. PIC STATES THAT DURING EVENT, NEW CTLR INTERVENED, POSSIBLY TRAINING INSTRUCTOR.
Narrative: RADAR VECTORS ASSIGNED, CLBING TO FL270. ATC INSTRUCTED US TO STOP CLB AT FL220 -- COMPLIED. THEN GIVEN HDG OF 180 DEGS. WHILE IN TURN, TCASII TA, THEN RA COMMAND TO CLB. CLRED CONFLICT AT FL250. WHILE RETURNING TO FL220, ATC REQUESTED A CLB TO FL270. CONFLICT RESOLVED WITH MINIMUM SEPARATION OF 4 NM. ATC CTLR'S VOICE CHANGED FROM FEMALE TO MALE DURING EPISODE. BELIEVE ATC TRAINING WAS IN PROGRESS.
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.