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Air carrier on oceanic route deviates WX. ATC clearance is slow so end up deviating without clearance.
| Attributes | |
| ACN | 218181 |
| Time | |
| Date | 199208 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : hnl |
| State Reference | HI |
| Altitude | msl bound lower : 35000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 4 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : pacific enroute : other oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 5500 flight time type : 300 |
| ASRS Report | 218181 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | inflight encounter : weather non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Radar picked up a line of thunderstorms at 300 NM out. We waited to see what it would look like on the 150 mi scale. It looked solid. The best way around looked like the north side. We requested a deviation of 25 mi north of track. ATC granted it after a delay of approximately 5 mins. We started north around the line. Soon, we saw 25 mi would not be enough. We requested 50 mi north of track. It took what seemed like 10 to 15 mins to get clearance. By then, we even needed 100 mi north of track to stay clear of the returns on the radar. By the time clearance had been received to deviate 50 NM north of track we had gone 100 mi north and were starting back towards track. The communication system over water is unwieldy and too slow when quick decisions need to be made regarding WX deviations. Let's get satellite communication, navigation, and flight following operational so we don't have these overwater problems!
Original NASA ASRS Text
Title: ACR ON OCEANIC RTE DEVIATES WX. ATC CLRNC IS SLOW SO END UP DEVIATING WITHOUT CLRNC.
Narrative: RADAR PICKED UP A LINE OF TSTMS AT 300 NM OUT. WE WAITED TO SEE WHAT IT WOULD LOOK LIKE ON THE 150 MI SCALE. IT LOOKED SOLID. THE BEST WAY AROUND LOOKED LIKE THE N SIDE. WE REQUESTED A DEV OF 25 MI N OF TRACK. ATC GRANTED IT AFTER A DELAY OF APPROX 5 MINS. WE STARTED N AROUND THE LINE. SOON, WE SAW 25 MI WOULD NOT BE ENOUGH. WE REQUESTED 50 MI N OF TRACK. IT TOOK WHAT SEEMED LIKE 10 TO 15 MINS TO GET CLRNC. BY THEN, WE EVEN NEEDED 100 MI N OF TRACK TO STAY CLR OF THE RETURNS ON THE RADAR. BY THE TIME CLRNC HAD BEEN RECEIVED TO DEVIATE 50 NM N OF TRACK WE HAD GONE 100 MI N AND WERE STARTING BACK TOWARDS TRACK. THE COM SYS OVER WATER IS UNWIELDY AND TOO SLOW WHEN QUICK DECISIONS NEED TO BE MADE REGARDING WX DEVS. LET'S GET SATELLITE COM, NAV, AND FLT FOLLOWING OPERATIONAL SO WE DON'T HAVE THESE OVERWATER PROBLEMS!
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.