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Less than standard separation between two air carrier making simultaneous parallel approachs. Operational error.
| Attributes | |
| ACN | 90500 |
| Time | |
| Date | 198807 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : clt |
| State Reference | NC |
| Altitude | msl bound lower : 2400 msl bound upper : 3400 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : clt tracon : alba |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach descent other landing other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 16000 flight time type : 450 |
| ASRS Report | 90500 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 8000 flight time type : 1500 |
| ASRS Report | 90499 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance none taken : insufficient time other |
| Consequence | Other |
| Miss Distance | horizontal : 5000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Being vectored for simultaneous ILS 36R at clt abeam clt at 4000' heading 180 degree. Given descent to 3400'. 15 miles south given turn to 330 degree and intercept. Approach control asked if we saw air carrier Y 12 O'clock intercepting 36L localizer. Then controller then told us to immediately descend to 2400'. The other aircraft was at 3400'. Nothing on approach plate indicated we should be at 2400'. That is the altitude to FAF but it is not shown as mandatory altitude. The 2400' is only shown as a min altitude until G/south intercept. Supplemental information from acn 90499. Recommendation keep 36L traffic at 3400', 36R at 2400'. Therefore protect if either overshoots.
Original NASA ASRS Text
Title: LESS THAN STANDARD SEPARATION BETWEEN TWO ACR MAKING SIMULTANEOUS PARALLEL APCHS. OPERATIONAL ERROR.
Narrative: BEING VECTORED FOR SIMULTANEOUS ILS 36R AT CLT ABEAM CLT AT 4000' HDG 180 DEG. GIVEN DSCNT TO 3400'. 15 MILES S GIVEN TURN TO 330 DEG AND INTERCEPT. APCH CTL ASKED IF WE SAW ACR Y 12 O'CLOCK INTERCEPTING 36L LOC. THEN CTLR THEN TOLD US TO IMMEDIATELY DSND TO 2400'. THE OTHER ACFT WAS AT 3400'. NOTHING ON APCH PLATE INDICATED WE SHOULD BE AT 2400'. THAT IS THE ALT TO FAF BUT IT IS NOT SHOWN AS MANDATORY ALT. THE 2400' IS ONLY SHOWN AS A MIN ALT UNTIL G/S INTERCEPT. SUPPLEMENTAL INFO FROM ACN 90499. RECOMMENDATION KEEP 36L TFC AT 3400', 36R AT 2400'. THEREFORE PROTECT IF EITHER OVERSHOOTS.
Data retrieved from NASA's ASRS site as of August 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.