 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
An MD80 crew reports executing an escape maneuver in response to a GPWS terrain aural-visual warning at 9000 ft approaching ord.
| Attributes | |
| ACN | 678107 |
| Time | |
| Date | 200511 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | msl single value : 9000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Ice Rain Fog |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 678107 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 678111 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | aircraft equipment : gpws |
| Resolutory Action | aircraft : equipment problem dissipated |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Captain's leg. Third leg of the day. We were talking to ord approach control on 119.0 being vectored for an ILS to runway 9R. We were level at 9000 ft in IMC with autoplt and autothrottle engaged when the captain called out 'radio altimeter alive.' I looked at the TCAS to see if another aircraft was right below us; but saw no target. Almost immediately after the captain called out the RA; we got a GPWS warning: red GPWS warning light flashing and the aural 'terrain; terrain; whoop; whoop; pull up; pull up.' the captain immediately executed the escape maneuver. I called approach control and told them we were responding to a terrain warning and climbing. We leveled at 11000 ft and the warning stopped. I explained to approach control what had happened (I think he thought I was joking at first -- I don't think our maneuver created a conflict). We never declared an emergency; so technically this was an unauthorized climb from 9000 ft to 11000 ft. The remainder of the flight was uneventful.
Original NASA ASRS Text
Title: AN MD80 CREW RPTS EXECUTING AN ESCAPE MANEUVER IN RESPONSE TO A GPWS TERRAIN AURAL-VISUAL WARNING AT 9000 FT APCHING ORD.
Narrative: CAPT'S LEG. THIRD LEG OF THE DAY. WE WERE TALKING TO ORD APCH CTL ON 119.0 BEING VECTORED FOR AN ILS TO RWY 9R. WE WERE LEVEL AT 9000 FT IN IMC WITH AUTOPLT AND AUTOTHROTTLE ENGAGED WHEN THE CAPT CALLED OUT 'RADIO ALTIMETER ALIVE.' I LOOKED AT THE TCAS TO SEE IF ANOTHER ACFT WAS RIGHT BELOW US; BUT SAW NO TARGET. ALMOST IMMEDIATELY AFTER THE CAPT CALLED OUT THE RA; WE GOT A GPWS WARNING: RED GPWS WARNING LIGHT FLASHING AND THE AURAL 'TERRAIN; TERRAIN; WHOOP; WHOOP; PULL UP; PULL UP.' THE CAPT IMMEDIATELY EXECUTED THE ESCAPE MANEUVER. I CALLED APCH CTL AND TOLD THEM WE WERE RESPONDING TO A TERRAIN WARNING AND CLBING. WE LEVELED AT 11000 FT AND THE WARNING STOPPED. I EXPLAINED TO APCH CTL WHAT HAD HAPPENED (I THINK HE THOUGHT I WAS JOKING AT FIRST -- I DON'T THINK OUR MANEUVER CREATED A CONFLICT). WE NEVER DECLARED AN EMER; SO TECHNICALLY THIS WAS AN UNAUTH CLB FROM 9000 FT TO 11000 FT. THE REMAINDER OF THE FLT WAS UNEVENTFUL.
Data retrieved from NASA's ASRS site as of January 2009 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.