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B757-200 first officer selects flch (flight level change) rather than vertical speed mode during localizer only approach to runway 35 at sdf. Resulting excessive rate triggers GPWS and low altitude alert warnings.
| Attributes | |
| ACN | 716219 |
| Time | |
| Date | 200611 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sdf.airport |
| State Reference | KY |
| Altitude | agl single value : 1000 |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Controlling Facilities | tower : sdf.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer only : 35l |
| Flight Phase | landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 90 flight time type : 90 |
| ASRS Report | 716719 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 51 flight time total : 5500 flight time type : 1500 |
| ASRS Report | 716220 |
| Events | |
| Anomaly | non adherence : company policies non adherence : published procedure cabin event other |
| Independent Detector | atc equipment : msaw aircraft equipment : gpws |
| Resolutory Action | flight crew : executed go around |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
On approach to sdf we were assigned the localizer approach to runway 35L. Everything was normal with the approach until we crossed the crdnl FAF. Instead of correctly selecting vertical speed I inadvertently selected flight level change. The aircraft descended at approximately 1500 FPM and we heard a terrain GPWS call. The captain called go around and we discontinued the approach and went around to an uneventful approach and landing. The WX was reported to be well above minimums but we did not break out until right at our MDA. Supplemental information from acn 716220: at approximately 4 DME tower announced a low altitude alert monitor altitude.
Original NASA ASRS Text
Title: B757-200 FO SELECTS FLCH (FLT LEVEL CHANGE) RATHER THAN VERT SPD MODE DURING LOC ONLY APCH TO RWY 35 AT SDF. RESULTING EXCESSIVE RATE TRIGGERS GPWS AND LOW ALT ALERT WARNINGS.
Narrative: ON APCH TO SDF WE WERE ASSIGNED THE LOC APCH TO RWY 35L. EVERYTHING WAS NORMAL WITH THE APCH UNTIL WE CROSSED THE CRDNL FAF. INSTEAD OF CORRECTLY SELECTING VERT SPD I INADVERTENTLY SELECTED FLT LEVEL CHANGE. THE ACFT DSNDED AT APPROX 1500 FPM AND WE HEARD A TERRAIN GPWS CALL. THE CAPT CALLED GO AROUND AND WE DISCONTINUED THE APCH AND WENT AROUND TO AN UNEVENTFUL APCH AND LNDG. THE WX WAS RPTED TO BE WELL ABOVE MINIMUMS BUT WE DID NOT BREAK OUT UNTIL RIGHT AT OUR MDA. SUPPLEMENTAL INFO FROM ACN 716220: AT APPROX 4 DME TWR ANNOUNCED A LOW ALT ALERT MONITOR ALT.
Data retrieved from NASA's ASRS site as of January 2009 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.