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Potential conflict occurs as small aircraft pilot perform descent through occupied altitude and forces air carrier into an altitude deviation altitude excursion.
| Attributes | |
| ACN | 240072 |
| Time | |
| Date | 199304 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : bur |
| State Reference | CA |
| Altitude | msl bound lower : 7000 msl bound upper : 7350 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bur tower : sea |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 2500 |
| ASRS Report | 240072 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 1000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On departure out of burbank we were cleared to 13000 ft initially. We were given a westerly heading for traffic and also for gorman. We were also given an intermediate level off of 7000 ft for the same traffic. We received a TCASII TA followed by an RA. At the time we got the RA we also got visual contact and had to deviate 350 ft (opposite of RA) from our altitude to avoid the traffic. ATC (burbank departure control) said they never were able to communicate with the intruder aircraft. The intruder was VFR at 7500 ft and for whatever reason (either he saw us and started a maneuver or inadvertently descended) he descended through our altitude requiring us to deviate from our altitude in order to avoid a collision.
Original NASA ASRS Text
Title: POTENTIAL CONFLICT OCCURS AS SMA PLT PERFORM DSCNT THROUGH OCCUPIED ALT AND FORCES ACR INTO AN ALTDEV ALT EXCURSION.
Narrative: ON DEP OUT OF BURBANK WE WERE CLRED TO 13000 FT INITIALLY. WE WERE GIVEN A WESTERLY HDG FOR TFC AND ALSO FOR GORMAN. WE WERE ALSO GIVEN AN INTERMEDIATE LEVEL OFF OF 7000 FT FOR THE SAME TFC. WE RECEIVED A TCASII TA FOLLOWED BY AN RA. AT THE TIME WE GOT THE RA WE ALSO GOT VISUAL CONTACT AND HAD TO DEVIATE 350 FT (OPPOSITE OF RA) FROM OUR ALT TO AVOID THE TFC. ATC (BURBANK DEP CTL) SAID THEY NEVER WERE ABLE TO COMMUNICATE WITH THE INTRUDER ACFT. THE INTRUDER WAS VFR AT 7500 FT AND FOR WHATEVER REASON (EITHER HE SAW US AND STARTED A MANEUVER OR INADVERTENTLY DSNDED) HE DSNDED THROUGH OUR ALT REQUIRING US TO DEVIATE FROM OUR ALT IN ORDER TO AVOID A COLLISION.
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.