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Flight crew of trans-atlantic flight enroute to mco deviates from course due to encountering potentially severe thunderstorm WX without coordination with ZNY due to radio reception problem.
| Attributes | |
| ACN | 150520 |
| Time | |
| Date | 199007 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : kbv |
| State Reference | FO |
| Altitude | msl bound lower : 38000 msl bound upper : 39000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct enroute : other oceanic enroute other |
| 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 : 200 flight time total : 20000 flight time type : 7000 |
| ASRS Report | 150520 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer |
| ASRS Report | 151763 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : exited adverse environment flight crew : returned to intended course or assigned course none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
Narrative:
While on oceanic clearance (INS direct to rubie, 32 degrees 53 mins north, 71 degree 40 mins west) deviation around heavy WX on course was necessary. We were unable to obtain the necessary clearance. Efforts were more difficult because of heavy precipitation static. Declared an emergency for WX avoidance. Deviated as necessary and changed altitude (38000 ft) to enhance collision avoidance. Terminated emergency when clear of WX. Flight proceeded uneventful from then on. Poor communications (HF) and heavy crossing traffic added greatly to this problem.
Original NASA ASRS Text
Title: FLT CREW OF TRANS-ATLANTIC FLT ENROUTE TO MCO DEVIATES FROM COURSE DUE TO ENCOUNTERING POTENTIALLY SEVERE THUNDERSTORM WX WITHOUT COORD WITH ZNY DUE TO RADIO RECEPTION PROBLEM.
Narrative: WHILE ON OCEANIC CLRNC (INS DIRECT TO RUBIE, 32 DEGS 53 MINS N, 71 DEG 40 MINS W) DEV AROUND HVY WX ON COURSE WAS NECESSARY. WE WERE UNABLE TO OBTAIN THE NECESSARY CLRNC. EFFORTS WERE MORE DIFFICULT BECAUSE OF HVY PRECIPITATION STATIC. DECLARED AN EMER FOR WX AVOIDANCE. DEVIATED AS NECESSARY AND CHANGED ALT (38000 FT) TO ENHANCE COLLISION AVOIDANCE. TERMINATED EMER WHEN CLR OF WX. FLT PROCEEDED UNEVENTFUL FROM THEN ON. POOR COMS (HF) AND HVY XING TFC ADDED GREATLY TO THIS PROB.
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.