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An air carrier medium large transport climbed in response to a TCASII command caused by 2 military tankers.
| Attributes | |
| ACN | 236402 |
| Time | |
| Date | 199303 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : geg |
| State Reference | WA |
| Altitude | msl bound lower : 7000 msl bound upper : 7800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : geg |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Military Transport |
| Navigation In Use | Other |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 14000 flight time type : 700 |
| ASRS Report | 236402 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 7900 flight time type : 3000 |
| ASRS Report | 236129 |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
IFR flight plan, assigned 7000 ft, left downwind for runway 3 at geg. Talking to approach control, approach advised us that 2 mlt's would be departing fairchild toward us, but would level at 6000 ft. We expected a visual approach after they cleared under us. Made visual contact and TCASII contact as the mlt's climbed through 4000 ft. As both aircraft reached 6000 ft, we got the yellow 'traffic' warning. Mlt #2 leveled at 6000 ft while #1 continued to climb. As #1 climbed to 6300 ft, TCASII warned 'do not descend.' as #1 climbed to 6500 ft TCASII instructed 'climb, climb.' we started an immediate climb until TCASII instructed all clear and we saw the mlt descending back to 6000 ft. We stopped our climb at 7800 ft and descended back to 7000 ft. Conclusion: basic altitude 'bust' by mlt lead. TCASII performed perfectly, first officer responded as trained. Only worry, light aircraft without altitude encoding xponders or no xponders at all! Supplemental information from acn 236129: when we advised the controller that we had deviated from our assigned altitude due to an RA from our TCASII, the controller said the highest readout he had from the mlt mode C readout was 6300 ft MSL.
Original NASA ASRS Text
Title: AN ACR MLG CLBED IN RESPONSE TO A TCASII COMMAND CAUSED BY 2 MIL TANKERS.
Narrative: IFR FLT PLAN, ASSIGNED 7000 FT, L DOWNWIND FOR RWY 3 AT GEG. TALKING TO APCH CTL, APCH ADVISED US THAT 2 MLT'S WOULD BE DEPARTING FAIRCHILD TOWARD US, BUT WOULD LEVEL AT 6000 FT. WE EXPECTED A VISUAL APCH AFTER THEY CLRED UNDER US. MADE VISUAL CONTACT AND TCASII CONTACT AS THE MLT'S CLBED THROUGH 4000 FT. AS BOTH ACFT REACHED 6000 FT, WE GOT THE YELLOW 'TFC' WARNING. MLT #2 LEVELED AT 6000 FT WHILE #1 CONTINUED TO CLB. AS #1 CLBED TO 6300 FT, TCASII WARNED 'DO NOT DSND.' AS #1 CLBED TO 6500 FT TCASII INSTRUCTED 'CLB, CLB.' WE STARTED AN IMMEDIATE CLB UNTIL TCASII INSTRUCTED ALL CLR AND WE SAW THE MLT DSNDING BACK TO 6000 FT. WE STOPPED OUR CLB AT 7800 FT AND DSNDED BACK TO 7000 FT. CONCLUSION: BASIC ALT 'BUST' BY MLT LEAD. TCASII PERFORMED PERFECTLY, FO RESPONDED AS TRAINED. ONLY WORRY, LIGHT ACFT WITHOUT ALT ENCODING XPONDERS OR NO XPONDERS AT ALL! SUPPLEMENTAL INFO FROM ACN 236129: WHEN WE ADVISED THE CTLR THAT WE HAD DEVIATED FROM OUR ASSIGNED ALT DUE TO AN RA FROM OUR TCASII, THE CTLR SAID THE HIGHEST READOUT HE HAD FROM THE MLT MODE C READOUT WAS 6300 FT MSL.
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.