37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Attributes | |
ACN | 416520 |
Time | |
Date | 199810 |
Day | Mon |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | atc facility : cuu |
State Reference | FO |
Altitude | msl bound lower : 9000 msl bound upper : 10000 |
Environment | |
Flight Conditions | VMC |
Light | Daylight |
Aircraft 1 | |
Controlling Facilities | tracon : cuu |
Operator | common carrier : air taxi |
Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
Operating Under FAR Part | Part 135 |
Navigation In Use | Other |
Flight Phase | descent other |
Flight Plan | IFR |
Aircraft 2 | |
Operator | common carrier : air carrier |
Make Model Name | SF 340A |
Operating Under FAR Part | Part 121 |
Navigation In Use | Other |
Flight Phase | cruise other |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air taxi |
Function | flight crew : captain oversight : pic |
Qualification | pilot : cfi pilot : atp |
Experience | flight time last 90 days : 150 flight time total : 3500 flight time type : 2000 |
ASRS Report | 416520 |
Person 2 | |
Affiliation | company : air taxi |
Function | flight crew : first officer |
Qualification | pilot : instrument pilot : commercial |
Events | |
Anomaly | conflict : airborne less severe other anomaly other |
Independent Detector | aircraft equipment other aircraft equipment : unspecified |
Resolutory Action | none taken : anomaly accepted |
Consequence | Other |
Miss Distance | horizontal : 24000 vertical : 0 |
Supplementary | |
Primary Problem | Flight Crew Human Performance |
Air Traffic Incident | other |
Narrative:
On descent into mmcu I was cleared to 10000 ft MSL. ATC pointed out traffic at our 1 O'clock position and 9000 ft. We said that we had the traffic in sight. The controller then said that we could descend with visual separation with the traffic. We estimated the position of the traffic to be about 4 SM away. As we descended through his altitude, he reported that his TCASII gave him an RA. I did not give this much concern because I thought he was under the knowledge that I was operating on visual separation standards. I think that the language barrier (I was speaking english and the saab, spanish) and ATC's failure to notify the saab crew of our position and intentions contributed to the confusion.
Original NASA ASRS Text
Title: A DSNDING ATX JET SETS OFF AN SF340'S TCASII WHEN IT PASSES THROUGH THE SF340'S ALT. THE ATX WAS ON A VISUAL SEPARATION DSCNT, 4 MI FROM THE SF340.
Narrative: ON DSCNT INTO MMCU I WAS CLRED TO 10000 FT MSL. ATC POINTED OUT TFC AT OUR 1 O'CLOCK POS AND 9000 FT. WE SAID THAT WE HAD THE TFC IN SIGHT. THE CTLR THEN SAID THAT WE COULD DSND WITH VISUAL SEPARATION WITH THE TFC. WE ESTIMATED THE POS OF THE TFC TO BE ABOUT 4 SM AWAY. AS WE DSNDED THROUGH HIS ALT, HE RPTED THAT HIS TCASII GAVE HIM AN RA. I DID NOT GIVE THIS MUCH CONCERN BECAUSE I THOUGHT HE WAS UNDER THE KNOWLEDGE THAT I WAS OPERATING ON VISUAL SEPARATION STANDARDS. I THINK THAT THE LANGUAGE BARRIER (I WAS SPEAKING ENGLISH AND THE SAAB, SPANISH) AND ATC'S FAILURE TO NOTIFY THE SAAB CREW OF OUR POS AND INTENTIONS CONTRIBUTED TO THE CONFUSION.
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.