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A bae 125-800 flight crew flying the RNAV (GPS) runway 7 approach to rue in daylight VMC received an egpws terrain warning as they intercepted the vgp near nacbi. They believe the 1;800 ft range of hills as you approach nacbi at 2;800 MSL combined with a moderately high glide slope results in a closure rate that triggers the warning.
| Attributes | |
| ACN | 1013415 |
| Time | |
| Date | 201205 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | RUE.Airport |
| State Reference | AR |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | BAe 125 Series 800 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Approach |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 7000 Flight Crew Type 600 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Inflight Event / Encounter CFTT / CFIT |
Narrative:
Our aircraft is lpv approved so we decided to shoot the RNAV runway 07 at rue in VMC conditions to familiarize ourselves with the approach in the event we do need to shoot it IMC; as it's a small airport with much terrain around it. Glad we did. On final; around vgp intercept; our egpws gave us a 'terrain; terrain; pull up' warning. As we were VMC (clear; visibility +10) we could see the terrain and were well clear and established on altitude and on course so we continued. We could see the mountain below us; which rises rapidly before dropping off rapidly. I assume that due to our airspeed (at 190 KIAS) the rapidly rising terrain set off the software. However; had we been IMC; we would have gone around. Due to the nature of the approach; we surmise that we would have again received the warning on subsequent approaches; which pretty much renders this approach useless. The airport operator mentions this has been a complaint of other aircraft; but the FAA flight check people say it's within limits. This approach as it is now has a potential to cause disorientation to pilots; and worse; make pilots think it's ok to continue an approach with an egpws caution/warning.
Original NASA ASRS Text
Title: A BAe 125-800 flight crew flying the RNAV (GPS) Runway 7 approach to RUE in daylight VMC received an EGPWS terrain warning as they intercepted the VGP near NACBI. They believe the 1;800 FT range of hills as you approach NACBI at 2;800 MSL combined with a moderately high glide slope results in a closure rate that triggers the warning.
Narrative: Our aircraft is LPV approved so we decided to shoot the RNAV Runway 07 at RUE in VMC conditions to familiarize ourselves with the approach in the event we do need to shoot it IMC; as it's a small airport with much terrain around it. Glad we did. On final; around VGP intercept; our EGPWS gave us a 'Terrain; terrain; pull up' warning. As we were VMC (CLR; Visibility +10) we could see the terrain and were well clear and established on altitude and on course so we continued. We could see the mountain below us; which rises rapidly before dropping off rapidly. I assume that due to our airspeed (at 190 KIAS) the rapidly rising terrain set off the software. However; had we been IMC; we would have gone around. Due to the nature of the approach; we surmise that we would have again received the warning on subsequent approaches; which pretty much renders this approach useless. The airport operator mentions this has been a complaint of other aircraft; but the FAA flight check people say it's within limits. This approach as it is now has a potential to cause disorientation to pilots; and worse; make pilots think it's OK to continue an approach with an EGPWS caution/warning.
Data retrieved from NASA's ASRS site as of July 2013 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.