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Flight crew of an medium large transport stopped their visual approach descent and climbed in response to a GPWS warning which resulted due to their speed and rate of descent toward mountain ridge over which the ILS approach is located.
| Attributes | |
| ACN | 334321 |
| Time | |
| Date | 199604 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : las |
| State Reference | NV |
| Altitude | msl bound lower : 6500 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : las |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach descent other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 334321 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
GPWS activation flight. ATC facility, las tower. Location, runway 25L localizer 18 DME. You asked for GPWS reports, so here is another. Approaching las just south of the runway 25 localizer approximately 17 DME on GS, cleared visual approach. As we came upon the ridge the radar altimeter came alive but never got below 2200 ft. Descending on GS received terrain terrain, added power climbed a little bit, warning stopped, we continued to land normally. IAS was approximately 230 KTS, so rate of descent was probably 1500 FPM. Probably a valid warning. No problem, just thought I would add to your database.
Original NASA ASRS Text
Title: FLC OF AN MLG STOPPED THEIR VISUAL APCH DSCNT AND CLBED IN RESPONSE TO A GPWS WARNING WHICH RESULTED DUE TO THEIR SPD AND RATE OF DSCNT TOWARD MOUNTAIN RIDGE OVER WHICH THE ILS APCH IS LOCATED.
Narrative: GPWS ACTIVATION FLT. ATC FACILITY, LAS TWR. LOCATION, RWY 25L LOC 18 DME. YOU ASKED FOR GPWS RPTS, SO HERE IS ANOTHER. APCHING LAS JUST S OF THE RWY 25 LOC APPROX 17 DME ON GS, CLRED VISUAL APCH. AS WE CAME UPON THE RIDGE THE RADAR ALTIMETER CAME ALIVE BUT NEVER GOT BELOW 2200 FT. DSNDING ON GS RECEIVED TERRAIN TERRAIN, ADDED PWR CLBED A LITTLE BIT, WARNING STOPPED, WE CONTINUED TO LAND NORMALLY. IAS WAS APPROX 230 KTS, SO RATE OF DSCNT WAS PROBABLY 1500 FPM. PROBABLY A VALID WARNING. NO PROB, JUST THOUGHT I WOULD ADD TO YOUR DATABASE.
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.