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On stabilized approach at approximately 600 AGL descending, flight crew had GPWS alarm, made go around. Next approach and landing normal.
| Attributes | |
| ACN | 199134 |
| Time | |
| Date | 199201 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | agl bound lower : 300 agl bound upper : 600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach descent other landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 15500 flight time type : 14800 |
| ASRS Report | 199134 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Copilot flying, both navaids tuned to O'hare 27L ILS for reference, on localizer, slightly above GS for noise abatement. All checklists completed with landing flaps 30 degrees at 600 ft AGL. Got GPWS (ground proximity warning system) 'whoop, whoop, pull up' persisting at less than 300 ft AGL. Quickly checked all factors, found no apparent cause, elected to go around to assess situation. Second approach almost identical, but no warning, normal landing. Entire crew performed well. ATC gave usual excellent resequencing.
Original NASA ASRS Text
Title: ON STABILIZED APCH AT APPROX 600 AGL DSNDING, FLC HAD GPWS ALARM, MADE GAR. NEXT APCH AND LNDG NORMAL.
Narrative: COPLT FLYING, BOTH NAVAIDS TUNED TO O'HARE 27L ILS FOR REF, ON LOC, SLIGHTLY ABOVE GS FOR NOISE ABATEMENT. ALL CHKLISTS COMPLETED WITH LNDG FLAPS 30 DEGS AT 600 FT AGL. GOT GPWS (GND PROX WARNING SYS) 'WHOOP, WHOOP, PULL UP' PERSISTING AT LESS THAN 300 FT AGL. QUICKLY CHKED ALL FACTORS, FOUND NO APPARENT CAUSE, ELECTED TO GAR TO ASSESS SITUATION. SECOND APCH ALMOST IDENTICAL, BUT NO WARNING, NORMAL LNDG. ENTIRE CREW PERFORMED WELL. ATC GAVE USUAL EXCELLENT RESEQUENCING.
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.