 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
GPWS alerts air carrier flight crew of being too close to terrain during an IAP ILS approach. Thunderstorm activity in area.
| Attributes | |
| ACN | 349232 |
| Time | |
| Date | 199610 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bhm |
| State Reference | AL |
| Altitude | msl bound lower : 2200 msl bound upper : 2200 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bhm |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach landing : missed approach |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 4500 flight time type : 2112 |
| ASRS Report | 349232 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | inflight encounter : weather non adherence : published procedure other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : exited adverse environment other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Deviation other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
There were moderate to heavy rainshowers near the localizer course for runway 5. The controller stated he was going to vector us to the course near the marker and north of course and we could work our way onto the course to help avoid the showers. When the localizer came off the wall we were heading 090 degrees and began a left 30 degree bank turn and descent to follow the GS. The course was overshot to full scale deflection and we received a GPWS warning for terrain. A recovery and subsequent missed approach was accomplished. I believe we became too concerned about the rainshowers and allowed the controller to put us in a situation where a stabilized approach at the marker was not possible. Our situational awareness was low as we hit the marker 40 degrees off course. It is important for crews to immediately execute the GPWS warning procedures, and discuss later how they got themselves into it.
Original NASA ASRS Text
Title: GPWS ALERTS ACR FLC OF BEING TOO CLOSE TO TERRAIN DURING AN IAP ILS APCH. TSTM ACTIVITY IN AREA.
Narrative: THERE WERE MODERATE TO HVY RAINSHOWERS NEAR THE LOC COURSE FOR RWY 5. THE CTLR STATED HE WAS GOING TO VECTOR US TO THE COURSE NEAR THE MARKER AND N OF COURSE AND WE COULD WORK OUR WAY ONTO THE COURSE TO HELP AVOID THE SHOWERS. WHEN THE LOC CAME OFF THE WALL WE WERE HDG 090 DEGS AND BEGAN A L 30 DEG BANK TURN AND DSCNT TO FOLLOW THE GS. THE COURSE WAS OVERSHOT TO FULL SCALE DEFLECTION AND WE RECEIVED A GPWS WARNING FOR TERRAIN. A RECOVERY AND SUBSEQUENT MISSED APCH WAS ACCOMPLISHED. I BELIEVE WE BECAME TOO CONCERNED ABOUT THE RAINSHOWERS AND ALLOWED THE CTLR TO PUT US IN A SIT WHERE A STABILIZED APCH AT THE MARKER WAS NOT POSSIBLE. OUR SITUATIONAL AWARENESS WAS LOW AS WE HIT THE MARKER 40 DEGS OFF COURSE. IT IS IMPORTANT FOR CREWS TO IMMEDIATELY EXECUTE THE GPWS WARNING PROCS, AND DISCUSS LATER HOW THEY GOT THEMSELVES INTO IT.
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.