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GLF2 pilot had to avoid thunderstorms in the pacific by climbing above them. HF communication with the controller was not possible.
| Attributes | |
| ACN | 517549 |
| Time | |
| Date | 200107 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : faced |
| State Reference | FO |
| Altitude | msl bound lower : 39000 msl bound upper : 41500 |
| Environment | |
| Flight Conditions | Mixed |
| Weather Elements | Thunderstorm Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : corporate |
| Make Model Name | Gulfstream II |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 60 flight time total : 12000 flight time type : 3200 |
| ASRS Report | 517549 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : cfi pilot : multi engine pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 60 flight time total : 3800 flight time type : 200 |
| ASRS Report | 517551 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather inflight encounter other non adherence : clearance non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance none taken : insufficient time other |
| Supplementary | |
| Problem Areas | Weather Flight Crew Human Performance Company Aircraft |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Events of flight from yap island (ptya) to port moresby (aypy) on jul/wed/01. Route of flight: ptya direct yp direct keone direct faced direct magnetic direct tsl direct kub direct aypa. We cruised mach .80 at FL390 to faced, then FL410. The trip began routinely until 50 mi from faced. At that point due to thunderstorms, we requested through san francisco commercial radio to ZOA flight, a climb to FL410. ZOA advised us to place the request with madang radio. But it was difficult to establish communication with madang. And the severity of WX forced us to climb for safety of flight, to FL415. We chose FL415 to avoid any possible traffic conflict. At numerous times, on both HF frequencys and VHF frequencys, we tried to contact madang center, but were unable to. We had an air carrier plane relay for us, reporting our altitude as FL415. We were forced to maintain FL415 to stay out of severe WX. And when we were finally able to contact madang center, we were instructed to maintain FL410. Never at any time was a traffic conflict indicated on our TCASII system. We took the initiative of climbing to FL415 to ensure safety of flight.
Original NASA ASRS Text
Title: GLF2 PLT HAD TO AVOID TSTMS IN THE PACIFIC BY CLBING ABOVE THEM. HF COM WITH THE CTLR WAS NOT POSSIBLE.
Narrative: EVENTS OF FLT FROM YAP ISLAND (PTYA) TO PORT MORESBY (AYPY) ON JUL/WED/01. RTE OF FLT: PTYA DIRECT YP DIRECT KEONE DIRECT FACED DIRECT MAG DIRECT TSL DIRECT KUB DIRECT AYPA. WE CRUISED MACH .80 AT FL390 TO FACED, THEN FL410. THE TRIP BEGAN ROUTINELY UNTIL 50 MI FROM FACED. AT THAT POINT DUE TO TSTMS, WE REQUESTED THROUGH SAN FRANCISCO COMMERCIAL RADIO TO ZOA FLT, A CLB TO FL410. ZOA ADVISED US TO PLACE THE REQUEST WITH MADANG RADIO. BUT IT WAS DIFFICULT TO ESTABLISH COM WITH MADANG. AND THE SEVERITY OF WX FORCED US TO CLB FOR SAFETY OF FLT, TO FL415. WE CHOSE FL415 TO AVOID ANY POSSIBLE TFC CONFLICT. AT NUMEROUS TIMES, ON BOTH HF FREQS AND VHF FREQS, WE TRIED TO CONTACT MADANG CTR, BUT WERE UNABLE TO. WE HAD AN ACR PLANE RELAY FOR US, RPTING OUR ALT AS FL415. WE WERE FORCED TO MAINTAIN FL415 TO STAY OUT OF SEVERE WX. AND WHEN WE WERE FINALLY ABLE TO CONTACT MADANG CTR, WE WERE INSTRUCTED TO MAINTAIN FL410. NEVER AT ANY TIME WAS A TFC CONFLICT INDICATED ON OUR TCASII SYS. WE TOOK THE INITIATIVE OF CLBING TO FL415 TO ENSURE SAFETY OF FLT.
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.