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DC9 crew is instructed to maintain 170 KTS to the fat, but slows prior to fix and is vectored for another approach.
| Attributes | |
| ACN | 579760 |
| Time | |
| Date | 200304 |
| Day | Sun |
| Place | |
| Locale Reference | airport : msp.airport |
| State Reference | MN |
| Altitude | msl single value : 2700 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Rain |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : m98.tracon tower : lit.tower |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 50 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision arrival : 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 : 215 flight time total : 14500 flight time type : 8000 |
| ASRS Report | 579760 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | non adherence : clearance other anomaly |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued advisory controller : issued new clearance flight crew : executed missed approach |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Vectored for localizer only runway 30R at msp. At XA00Z, we were vectored to ILS runway 30R, GS out of service. We were cleared to fly ILS runway 30R at 170 KTS until 'jacko' (5.7 DME). We were turned onto final at 12 mi out. At 8 mi, we configured fully for the approach and slowed to final approach speed of 135 KTS. Approach control asked us our speed, and we replied that we were configured for the approach and at our final approach speed. Approach control cancelled our approach clearance, and we executed a missed approach at 'jacko' for return vectors to ILS runway 30R. There was no traffic on our TCASII, and we didn't hear anyone behind us on approach. No traffic conflict was noted by ATC or us. This is a hazardous situation in IMC conditions, because it does not allow a stabilized approach to be flown in IMC conditions on a timed approach. Slowing from 170 KTS to 135 KTS while descending on final does not allow for accurate timing from the FAF to map or vdp.
Original NASA ASRS Text
Title: DC9 CREW IS INSTRUCTED TO MAINTAIN 170 KTS TO THE FAT, BUT SLOWS PRIOR TO FIX AND IS VECTORED FOR ANOTHER APCH.
Narrative: VECTORED FOR LOC ONLY RWY 30R AT MSP. AT XA00Z, WE WERE VECTORED TO ILS RWY 30R, GS OUT OF SVC. WE WERE CLRED TO FLY ILS RWY 30R AT 170 KTS UNTIL 'JACKO' (5.7 DME). WE WERE TURNED ONTO FINAL AT 12 MI OUT. AT 8 MI, WE CONFIGURED FULLY FOR THE APCH AND SLOWED TO FINAL APCH SPD OF 135 KTS. APCH CTL ASKED US OUR SPD, AND WE REPLIED THAT WE WERE CONFIGURED FOR THE APCH AND AT OUR FINAL APCH SPD. APCH CTL CANCELLED OUR APCH CLRNC, AND WE EXECUTED A MISSED APCH AT 'JACKO' FOR RETURN VECTORS TO ILS RWY 30R. THERE WAS NO TFC ON OUR TCASII, AND WE DIDN'T HEAR ANYONE BEHIND US ON APCH. NO TFC CONFLICT WAS NOTED BY ATC OR US. THIS IS A HAZARDOUS SIT IN IMC CONDITIONS, BECAUSE IT DOES NOT ALLOW A STABILIZED APCH TO BE FLOWN IN IMC CONDITIONS ON A TIMED APCH. SLOWING FROM 170 KTS TO 135 KTS WHILE DSNDING ON FINAL DOES NOT ALLOW FOR ACCURATE TIMING FROM THE FAF TO MAP OR VDP.
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.