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Air carrier PIC's report on nonstandard use of aircraft equipment operating procedures with TCASII selected to RA position while on simultaneous parallel approach with other air carrier aircraft.
| Attributes | |
| ACN | 261003 |
| Time | |
| Date | 199401 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : msp |
| State Reference | MN |
| Altitude | agl bound lower : 1500 agl bound upper : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : msp |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 190 flight time total : 15200 flight time type : 9900 |
| ASRS Report | 261003 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other Other |
| Miss Distance | horizontal : 4000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On final approach in visual conditions, 15 plus mi visibility and clear, to runway 29R at msp, the TCASII gave an RA (to climb). Another aircraft was also on a visual approach to runway 29L and we were wingtip to wingtip for the entire approach. At about 1500 ft AGL we were also at the same altitude which obviously set off the TCASII. Since I had the aircraft in sight and we were not in any danger, no evasive action was taken. Normally, the TCASII is turned to TA only during parallel visual approachs, to prevent undue RA's.
Original NASA ASRS Text
Title: ACR PIC'S RPT ON NONSTANDARD USE OF ACFT EQUIP OPERATING PROCS WITH TCASII SELECTED TO RA POS WHILE ON SIMULTANEOUS PARALLEL APCH WITH OTHER ACR ACFT.
Narrative: ON FINAL APCH IN VISUAL CONDITIONS, 15 PLUS MI VISIBILITY AND CLR, TO RWY 29R AT MSP, THE TCASII GAVE AN RA (TO CLB). ANOTHER ACFT WAS ALSO ON A VISUAL APCH TO RWY 29L AND WE WERE WINGTIP TO WINGTIP FOR THE ENTIRE APCH. AT ABOUT 1500 FT AGL WE WERE ALSO AT THE SAME ALT WHICH OBVIOUSLY SET OFF THE TCASII. SINCE I HAD THE ACFT IN SIGHT AND WE WERE NOT IN ANY DANGER, NO EVASIVE ACTION WAS TAKEN. NORMALLY, THE TCASII IS TURNED TO TA ONLY DURING PARALLEL VISUAL APCHS, TO PREVENT UNDUE RA'S.
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.