37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Attributes | |
ACN | 1645904 |
Time | |
Date | 201905 |
Local Time Of Day | 1201-1800 |
Place | |
Locale Reference | BGR.Airport |
State Reference | ME |
Environment | |
Flight Conditions | Marginal |
Light | Daylight |
Aircraft 1 | |
Make Model Name | EMB ERJ 145 ER/LR |
Operating Under FAR Part | Part 121 |
Flight Phase | Initial Approach |
Route In Use | STAR RNAV (GPS) RWY 33 |
Flight Plan | IFR |
Person 1 | |
Function | Captain Pilot Flying |
Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
Experience | Flight Crew Total 2900 Flight Crew Type 500 |
Events | |
Anomaly | Aircraft Equipment Problem Less Severe Inflight Event / Encounter CFTT / CFIT |
Narrative:
We were on the RNAV approach to runway 33 in bgr. Level at 3;000 feet; we were cleared direct to elsuh and cleared for the approach. We passed elsuh at 3;000 feet and I began a slow descent to 2;300 feet for cuvot; the final approach fix. As I passed through about 2;400 feet we received the 'terrain terrain pull up' aural warning with a red ground proximity annunciation on the pfd. I initiated the GPWS escape maneuver; and almost immediately the warnings extinguished. I eased the aircraft nose down; and we were at about 2;900 feet by the time we were fully level. At this point; we were about 4 miles from the FAF; and only about 600 feet above the minimum altitude at the FAF; so I elected to continue the approach. The remainder of the flight was uneventful.although we were established on the final approach course and above the minimum altitude for that segment; I'm assuming the warning was triggered based on our rate of closure with the 1;251 feet hill depicted on the chart. This approach is notorious for triggering the GPWS even when the approach is being followed appropriately. Executed GPWS escape maneuver; returned to normal flight.this is just a poorly designed approach. It is not reasonable for an instrument approach procedure to trigger egpws as frequently as it does. The problem could be solved by moving elsuh in about 4 miles- this would put elsuh 4 miles outside of cuvot; leaving plenty of room for aircraft to descend from 3;000 feet to 2;300 feet and preventing aircraft from descending until the 1;251 feet hill is passed. I would be genuinely interested in passing this suggestion along to the FAA; if an appropriate channel exists.
Original NASA ASRS Text
Title: EMB-145 Captain reported a terrain issue associated with the RNAV Runway 33 Approach into Bangor; Maine.
Narrative: We were on the RNAV approach to Runway 33 in BGR. Level at 3;000 feet; we were cleared direct to ELSUH and cleared for the approach. We passed ELSUH at 3;000 feet and I began a slow descent to 2;300 feet for CUVOT; the final approach fix. As I passed through about 2;400 feet we received the 'TERRAIN TERRAIN PULL UP' aural warning with a red GND PROX annunciation on the PFD. I initiated the GPWS escape maneuver; and almost immediately the warnings extinguished. I eased the aircraft nose down; and we were at about 2;900 feet by the time we were fully level. At this point; we were about 4 miles from the FAF; and only about 600 feet above the minimum altitude at the FAF; so I elected to continue the approach. The remainder of the flight was uneventful.Although we were established on the final approach course and above the minimum altitude for that segment; I'm assuming the warning was triggered based on our rate of closure with the 1;251 feet hill depicted on the chart. This approach is notorious for triggering the GPWS even when the approach is being followed appropriately. Executed GPWS escape maneuver; returned to normal flight.This is just a poorly designed approach. It is not reasonable for an instrument approach procedure to trigger EGPWS as frequently as it does. The problem could be solved by moving ELSUH in about 4 miles- this would put ELSUH 4 miles outside of CUVOT; leaving plenty of room for aircraft to descend from 3;000 feet to 2;300 feet and preventing aircraft from descending until the 1;251 feet hill is passed. I would be genuinely interested in passing this suggestion along to the FAA; if an appropriate channel exists.
Data retrieved from NASA's ASRS site 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.