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An air carrier crew flying IMC at 2;000 ft MSL on a left downwind to a lga runway 13 ILS executed the escape maneuver to 3;500 ft MSL after the egpws alerted 'terrain pull up.'
| Attributes | |
| ACN | 1052160 |
| Time | |
| Date | 201212 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | LGA.Airport |
| State Reference | NY |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Medium Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Radio Altimeter |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter CFTT / CFIT |
Narrative:
We were being vectored for an ILS 13 into lga. As we were being vectored at 2;000 ft MSL on a left downwind; the captain's side radar altimeter was fluctuating. We then received the GPWS 'terrain terrain woop woop pull up' we executed the CFIT escape maneuver. We climbed to about 3;500 ft MSL. The warning stopped. I notified ATC of the warning and climb. They then cleared us back down to 2;000 ft MSL. The rest of the flight was uneventful. I am not sure if the radar altimeter was malfunctioning and that can cause that or if we truly were near the buildings over manhattan. I never saw any red on the terrain display. But as we were on final I did notice that the high point was noted at 1;900 ft MSL. I wrote the GPWS up in maintenance book and maintenance came out and tested it and found no problems. We proceeded on next flight with no warnings.
Original NASA ASRS Text
Title: An Air Carrier crew flying IMC at 2;000 FT MSL on a left downwind to a LGA Runway 13 ILS executed the escape maneuver to 3;500 FT MSL after the EGPWS alerted 'TERRAIN PULL UP.'
Narrative: We were being vectored for an ILS 13 into LGA. As we were being vectored at 2;000 FT MSL on a left downwind; the Captain's side radar altimeter was fluctuating. We then received the GPWS 'TERRAIN TERRAIN WOOP WOOP PULL UP' we executed the CFIT escape maneuver. We climbed to about 3;500 FT MSL. The warning stopped. I notified ATC of the warning and climb. They then cleared us back down to 2;000 FT MSL. The rest of the flight was uneventful. I am not sure if the radar altimeter was malfunctioning and that can cause that or if we truly were near the buildings over Manhattan. I never saw any red on the Terrain Display. But as we were on final I did notice that the high point was noted at 1;900 FT MSL. I wrote the GPWS up in maintenance book and Maintenance came out and tested it and found no problems. We proceeded on next flight with no warnings.
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.