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An air carrier B737 flight crew has an near midair collision with traffic at their assigned altitude. They followed the TCASII RA instructions successfully.
| Attributes | |
| ACN | 372559 |
| Time | |
| Date | 199706 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : iah |
| State Reference | TX |
| Altitude | msl bound lower : 5000 msl bound upper : 5200 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iah tracon : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 250 flight time total : 20000 flight time type : 8000 |
| ASRS Report | 372559 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 100 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On departure from iah, ATC cleared us direct to playa. Approaching 'cbrez,' ATC gave us a heading of 180 degrees at 5000 ft. Between cbrez and skuba the hard RA TCASII activated to climb. Aircraft climbed as instructed by TCASII. The TCASII displayed aircraft below us at approximately 100 ft as we were climbing through 5200 ft. We did not see the traffic. We reported TCASII activation to iah departure control. Thank god I wasn't following the elimination of the 250 KT restr below 10000 ft. That is too dangerous until all aircraft have mode C.
Original NASA ASRS Text
Title: AN ACR B737 FLC HAS AN NMAC WITH TFC AT THEIR ASSIGNED ALT. THEY FOLLOWED THE TCASII RA INSTRUCTIONS SUCCESSFULLY.
Narrative: ON DEP FROM IAH, ATC CLRED US DIRECT TO PLAYA. APCHING 'CBREZ,' ATC GAVE US A HDG OF 180 DEGS AT 5000 FT. BTWN CBREZ AND SKUBA THE HARD RA TCASII ACTIVATED TO CLB. ACFT CLBED AS INSTRUCTED BY TCASII. THE TCASII DISPLAYED ACFT BELOW US AT APPROX 100 FT AS WE WERE CLBING THROUGH 5200 FT. WE DID NOT SEE THE TFC. WE RPTED TCASII ACTIVATION TO IAH DEP CTL. THANK GOD I WASN'T FOLLOWING THE ELIMINATION OF THE 250 KT RESTR BELOW 10000 FT. THAT IS TOO DANGEROUS UNTIL ALL ACFT HAVE MODE C.
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.