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GA small aircraft unauthorized penetration of positive control area triggers TCASII warning in passing air carrier medium large transport.
| Attributes | |
| ACN | 182739 |
| Time | |
| Date | 199107 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : trm |
| State Reference | CA |
| Altitude | msl bound lower : 19000 msl bound upper : 19000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | None |
| Aircraft 2 | |
| 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 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | oversight : pic |
| Qualification | pilot : private pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 25 flight time total : 3500 flight time type : 3000 |
| ASRS Report | 182739 |
| Person 2 | |
| Affiliation | Other |
| Function | other personnel other |
| Qualification | pilot : private |
| Events | |
| Anomaly | conflict : nmac non adherence : far other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance none taken : detected after the fact |
| Consequence | Other |
| Miss Distance | horizontal : 6000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Pilot and an observer (private pilot) departed crq on a training flight to evaluate high altitude performance of a newly installed turbocharger and small aircraft. 25 mi southwest of thermal, ca, we contacted psp approach for clearance into positive control area with a request to do high altitude air work to 25000' on a heading of 050 degrees. We were given a transponder code and told to contact ZLA for clearance. When issued a transponder code and not denied entrance into positive control area we assumed it was all right to proceed until a clearance was given. ZLA informed us an medium large transport had a TCAS alert and asked if we had seen the jet. At this time we were at 19000' and climbing. Center assigned us a new squawk and cleared us to 23000' on a heading of 050 degrees. We completed our test flight west/O further incident. We were not informed of the proximity of the medium large transport and had no visibility contact. We should have contacted ATC earlier--15000' and stated our request. ATC should request aircraft to remain below 18000' if a problem exists. This situation could easily have happened at 17900', as well as 19000'.
Original NASA ASRS Text
Title: GA SMA UNAUTH PENETRATION OF PCA TRIGGERS TCASII WARNING IN PASSING ACR MLG.
Narrative: PLT AND AN OBSERVER (PVT PLT) DEPARTED CRQ ON A TRNING FLT TO EVALUATE HIGH ALT PERFORMANCE OF A NEWLY INSTALLED TURBOCHARGER AND SMA. 25 MI SW OF THERMAL, CA, WE CONTACTED PSP APCH FOR CLRNC INTO PCA WITH A REQUEST TO DO HIGH ALT AIR WORK TO 25000' ON A HDG OF 050 DEGS. WE WERE GIVEN A XPONDER CODE AND TOLD TO CONTACT ZLA FOR CLRNC. WHEN ISSUED A XPONDER CODE AND NOT DENIED ENTRANCE INTO PCA WE ASSUMED IT WAS ALL RIGHT TO PROCEED UNTIL A CLRNC WAS GIVEN. ZLA INFORMED US AN MLG HAD A TCAS ALERT AND ASKED IF WE HAD SEEN THE JET. AT THIS TIME WE WERE AT 19000' AND CLBING. CENTER ASSIGNED US A NEW SQUAWK AND CLRED US TO 23000' ON A HDG OF 050 DEGS. WE COMPLETED OUR TEST FLT W/O FURTHER INCIDENT. WE WERE NOT INFORMED OF THE PROX OF THE MLG AND HAD NO VIS CONTACT. WE SHOULD HAVE CONTACTED ATC EARLIER--15000' AND STATED OUR REQUEST. ATC SHOULD REQUEST ACFT TO REMAIN BELOW 18000' IF A PROB EXISTS. THIS SITUATION COULD EASILY HAVE HAPPENED AT 17900', AS WELL AS 19000'.
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.