 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of an medium large transport leveled off in descent in response to a TCASII RA. Near midair collision.
| Attributes | |
| ACN | 270980 |
| Time | |
| Date | 199405 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : oak |
| State Reference | CA |
| Altitude | msl bound lower : 5000 msl bound upper : 5500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : v3o1 |
| Flight Plan | VFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Bonanza 35 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6000 flight time type : 1600 |
| ASRS Report | 270980 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Arriving inbound to oakland at 6000 ft, ATC pointed out traffic, not in contact with ATC, level at 5000 ft unconfirmed. They then cleared us to maintain 5000 ft. We started our descent and advised ATC that we would level off momentarily at 5500 ft with visual contact of our traffic to avoid any possible collision. Our TCASII positively idented the bonanza, and instructed a climb as we leveled at 5500 ft. We communicated effectively with ATC and descended to 5000 ft. After we were clear of the conflict. ATC approved our momentary leveloff.
Original NASA ASRS Text
Title: FLC OF AN MLG LEVELED OFF IN DSCNT IN RESPONSE TO A TCASII RA. NMAC.
Narrative: ARRIVING INBOUND TO OAKLAND AT 6000 FT, ATC POINTED OUT TFC, NOT IN CONTACT WITH ATC, LEVEL AT 5000 FT UNCONFIRMED. THEY THEN CLRED US TO MAINTAIN 5000 FT. WE STARTED OUR DSCNT AND ADVISED ATC THAT WE WOULD LEVEL OFF MOMENTARILY AT 5500 FT WITH VISUAL CONTACT OF OUR TFC TO AVOID ANY POSSIBLE COLLISION. OUR TCASII POSITIVELY IDENTED THE BONANZA, AND INSTRUCTED A CLB AS WE LEVELED AT 5500 FT. WE COMMUNICATED EFFECTIVELY WITH ATC AND DSNDED TO 5000 FT. AFTER WE WERE CLR OF THE CONFLICT. ATC APPROVED OUR MOMENTARY LEVELOFF.
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.