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Air carrier medium large transport received a GPWS warning while on vectors for an approach to yyz in heavy precipitation and turbulence.
| Attributes | |
| ACN | 183286 |
| Time | |
| Date | 199107 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : yyz |
| State Reference | ON |
| Altitude | msl bound lower : 8000 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : yyz |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 183286 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 6500 |
| ASRS Report | 183463 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance flight crew : exited adverse environment |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On approach to yyz descending to 8000 ft MSL in heavy rain/moderate turbulence (IMC) a GPWS warning 'terrain-terrain- whoop-whoop pull up' (mode 2) was heard. I was considering a go around due to WX and upon this warning I elected to go around and climb. (In accordance with company procedure) airspeed +/- 30 knots/vsi +/- 2000 FPM. During go around maneuver we were vectored into a 'squall line' by approach. (Trust me...). After we were told we would be turned prior to the squall line. Approach appeared not to have 'the big picture' as multiple aircraft were taking their own action to avoid WX. After were told that we would be vectored prior to WX and made our go around. Approach stated they weren't painting any WX. Supplemental information from acn 183463. At the same time, a turn away from the thunderstorm was started. TCAS was used to ensure safe traffic separation.
Original NASA ASRS Text
Title: ACR MLG RECEIVED A GPWS WARNING WHILE ON VECTORS FOR AN APCH TO YYZ IN HVY PRECIPITATION AND TURB.
Narrative: ON APCH TO YYZ DSNDING TO 8000 FT MSL IN HVY RAIN/MODERATE TURB (IMC) A GPWS WARNING 'TERRAIN-TERRAIN- WHOOP-WHOOP PULL UP' (MODE 2) WAS HEARD. I WAS CONSIDERING A GAR DUE TO WX AND UPON THIS WARNING I ELECTED TO GAR AND CLB. (IAW COMPANY PROC) AIRSPD +/- 30 KNOTS/VSI +/- 2000 FPM. DURING GAR MANEUVER WE WERE VECTORED INTO A 'SQUALL LINE' BY APCH. (TRUST ME...). AFTER WE WERE TOLD WE WOULD BE TURNED PRIOR TO THE SQUALL LINE. APCH APPEARED NOT TO HAVE 'THE BIG PICTURE' AS MULTIPLE ACFT WERE TAKING THEIR OWN ACTION TO AVOID WX. AFTER WERE TOLD THAT WE WOULD BE VECTORED PRIOR TO WX AND MADE OUR GAR. APCH STATED THEY WEREN'T PAINTING ANY WX. SUPPLEMENTAL INFO FROM ACN 183463. AT THE SAME TIME, A TURN AWAY FROM THE TSTM WAS STARTED. TCAS WAS USED TO ENSURE SAFE TFC SEPARATION.
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.