 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier pilot initiates climb maneuver when alerted by C90 approach of low altitude, recognizing as well a GS deflection.
| Attributes | |
| ACN | 495996 |
| Time | |
| Date | 200012 |
| Day | Thu |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | msl single value : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : c90.tracon |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 27l |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 10000 flight time type : 6500 |
| ASRS Report | 495996 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : published procedure |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued alert flight crew : returned to original clearance flight crew : took precautionary avoidance action |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Navigational Facility Flight Crew Human Performance |
| Primary Problem | Navigational Facility |
| Situations | |
| Navigational Aid | ORD.ILS |
Narrative:
While on approach to runway 27L at ord, on ILS, all cockpit indications showed we were on GS and localizer. As we got closer to field, we could see PAPI showed us very low. There were no cockpit warnings to correspond. As we started to climb back up to get back on GS via the PAPI, approach asked if we were low. We informed them of false GS information. They said they would look into it. Callback conversation with reporter revealed the following information: reporter has not encountered a similar type incident and has been into ord frequently since the problem occurred. Reporter did not observe any other aircraft activity on the adjoining ramp or crossing to departure runway 22.
Original NASA ASRS Text
Title: ACR PLT INITIATES CLB MANEUVER WHEN ALERTED BY C90 APCH OF LOW ALT, RECOGNIZING AS WELL A GS DEFLECTION.
Narrative: WHILE ON APCH TO RWY 27L AT ORD, ON ILS, ALL COCKPIT INDICATIONS SHOWED WE WERE ON GS AND LOC. AS WE GOT CLOSER TO FIELD, WE COULD SEE PAPI SHOWED US VERY LOW. THERE WERE NO COCKPIT WARNINGS TO CORRESPOND. AS WE STARTED TO CLB BACK UP TO GET BACK ON GS VIA THE PAPI, APCH ASKED IF WE WERE LOW. WE INFORMED THEM OF FALSE GS INFO. THEY SAID THEY WOULD LOOK INTO IT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR HAS NOT ENCOUNTERED A SIMILAR TYPE INCIDENT AND HAS BEEN INTO ORD FREQUENTLY SINCE THE PROB OCCURRED. RPTR DID NOT OBSERVE ANY OTHER ACFT ACTIVITY ON THE ADJOINING RAMP OR XING TO DEP RWY 22.
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.