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|
Attributes | |
ACN | 433206 |
Time | |
Date | 199904 |
Day | Fri |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | navaid : alb.vortac |
State Reference | FO |
Altitude | msl single value : 29000 |
Environment | |
Flight Conditions | Mixed |
Light | Daylight |
Aircraft 1 | |
Operator | common carrier : air carrier |
Make Model Name | B727-200 |
Operating Under FAR Part | Part 121 |
Flight Phase | cruise : level |
Route In Use | enroute : on vectors |
Flight Plan | IFR |
Aircraft 2 | |
Controlling Facilities | artcc : eduu.artcc |
Make Model Name | Commercial Fixed Wing |
Flight Phase | cruise : level |
Person 1 | |
Affiliation | company : air carrier |
Function | flight crew : captain oversight : pic |
Qualification | pilot : atp |
Experience | flight time last 90 days : 120 flight time total : 6000 flight time type : 4000 |
ASRS Report | 433206 |
Person 2 | |
Affiliation | company : air carrier |
Function | flight crew : first officer |
Qualification | pilot : multi engine pilot : instrument pilot : commercial |
Events | |
Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne critical non adherence : required legal separation |
Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
Resolutory Action | flight crew : returned to original clearance flight crew : took evasive action |
Miss Distance | vertical : 500 |
Supplementary | |
Problem Areas | ATC Human Performance Flight Crew Human Performance Airspace Structure |
Primary Problem | ATC Human Performance |
Air Traffic Incident | Operational Error |
Narrative:
While on a heading of approximately 110 degrees and at FL290, I heard 2 radio xmissions that were unreadable. A third transmission was barely readable, and it was instructions from the controller to turn 20 degrees left. At that time, TCASII issued a TA and immediately afterwards an RA to 'descend, descend now.' a descent was begun, and at FL285 the TCASII commanded 'monitor vertical speed' and then 'clear of conflict.' these events were immediately reported to the controller and the aircraft was returned to FL290. In my opinion, language was not the problem. I think poor equipment used by the controller or improper use of the ground equipment made the transmission unreadable.
Original NASA ASRS Text
Title: INTL B727-200 CREW RESPONDED TO TCASII RA AT FL290.
Narrative: WHILE ON A HDG OF APPROX 110 DEGS AND AT FL290, I HEARD 2 RADIO XMISSIONS THAT WERE UNREADABLE. A THIRD XMISSION WAS BARELY READABLE, AND IT WAS INSTRUCTIONS FROM THE CTLR TO TURN 20 DEGS L. AT THAT TIME, TCASII ISSUED A TA AND IMMEDIATELY AFTERWARDS AN RA TO 'DSND, DSND NOW.' A DSCNT WAS BEGUN, AND AT FL285 THE TCASII COMMANDED 'MONITOR VERT SPD' AND THEN 'CLR OF CONFLICT.' THESE EVENTS WERE IMMEDIATELY RPTED TO THE CTLR AND THE ACFT WAS RETURNED TO FL290. IN MY OPINION, LANGUAGE WAS NOT THE PROB. I THINK POOR EQUIP USED BY THE CTLR OR IMPROPER USE OF THE GND EQUIP MADE THE XMISSION UNREADABLE.
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.