37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Attributes | |
ACN | 997440 |
Time | |
Date | 201203 |
Local Time Of Day | 1201-1800 |
Place | |
Locale Reference | ZZZ.Airport |
State Reference | US |
Environment | |
Flight Conditions | VMC |
Light | Daylight |
Aircraft 1 | |
Make Model Name | EMB ERJ 145 ER/LR |
Operating Under FAR Part | Part 121 |
Flight Phase | Descent |
Flight Plan | IFR |
Aircraft 2 | |
Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
Flight Phase | Descent |
Person 1 | |
Function | Pilot Flying First Officer |
Person 2 | |
Function | Pilot Not Flying Captain |
Qualification | Flight Crew Air Transport Pilot (ATP) |
Events | |
Anomaly | ATC Issue All Types Airspace Violation All Types Conflict NMAC |
Miss Distance | Horizontal 0 Vertical 0 |
Narrative:
Level at 9;000; approach issued a traffic advisory of an aircraft at 12 o'clock; 10 miles; 9;300 ft descending; unverified. Traffic was on our TCAS display and the information matched the advisory from ATC. ATC then gave us a clearance to descend to 7;000. Descent was initiated and almost immediately we got the RA to descend; followed by climb and then descend again. Captain took control of the aircraft when the RA was issued to respond to the threat; at the closest point; the intruding aircraft appeared on our TCAS as a red target with '+00' directly on top of us. I informed ATC that we were responding to an RA. The threat was an intruding aircraft operating in class B airspace apparently without a clearance because he was not talking to ATC. I do not believe the TCAS should ever be meled. If our TCAS had been inoperative today; we very likely would have had a mid-air collision and dozens of people would have been killed; on our airplane; as well as on the ground in what is a very heavily populated area. The TCAS performed its function perfectly and I am thankful that we had it today.
Original NASA ASRS Text
Title: An EMB145 at 9;000 FT in Class B airspace had a near miss with an aircraft descending in Class B without a clearance.
Narrative: Level at 9;000; Approach issued a traffic advisory of an aircraft at 12 o'clock; 10 miles; 9;300 FT descending; unverified. Traffic was on our TCAS display and the information matched the advisory from ATC. ATC then gave us a clearance to descend to 7;000. Descent was initiated and almost immediately we got the RA to descend; followed by climb and then descend again. Captain took control of the aircraft when the RA was issued to respond to the threat; at the closest point; the intruding aircraft appeared on our TCAS as a red target with '+00' directly on top of us. I informed ATC that we were responding to an RA. The threat was an intruding aircraft operating in Class B airspace apparently without a clearance because he was not talking to ATC. I do not believe the TCAS should ever be MELed. If our TCAS had been inoperative today; we very likely would have had a mid-air collision and dozens of people would have been killed; on our airplane; as well as on the ground in what is a very heavily populated area. The TCAS performed its function perfectly and I am thankful that we had it today.
Data retrieved from NASA's ASRS site as of July 2013 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.