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A B777 flight crew failed to note that tokyo control's transmission was advising them to standby for their requested flight level change and instead began the climb without a clearance.
| Attributes | |
| ACN | 862900 |
| Time | |
| Date | 200911 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | RJTG.ARTCC |
| State Reference | FO |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Commercial Flight Crew Flight Engineer Flight Crew Multiengine Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 240 Flight Crew Total 18000 Flight Crew Type 3500 |
| Person 2 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 30 Flight Crew Total 12062 Flight Crew Type 216 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance |
Narrative:
I was the pilot flying. We were in cruise at FL310 under tokyo control in day VFR conditions. The captain requested a climb to FL330. I understood the controller to say 'cleared FL330.' I selected FL330 in the altitude window and stated 'climb FL330' and pointed at the new altitude. Passing through 32;200 ft tokyo called and said '(flight #) maintain FL310.' I began an immediate descent back to FL310. Prior to reaching FL310 tokyo called us back and cleared us to FL330. There were a number of contributing factors; the biggest being hard to understand controller's english. While I thought she said 'cleared FL330' the captain understood her to say 'coordinating FL330.' there was also a lack of crew coordination; because even though I announced and pointed at the new altitude I am not sure if I got confirmation from the captain. At this same time I was on the interphone with the cabin which was probably an added distraction.
Original NASA ASRS Text
Title: A B777 flight crew failed to note that Tokyo Control's transmission was advising them to standby for their requested Flight Level change and instead began the climb without a clearance.
Narrative: I was the pilot flying. We were in cruise at FL310 under Tokyo Control in day VFR conditions. The Captain requested a climb to FL330. I understood the Controller to say 'cleared FL330.' I selected FL330 in the altitude window and stated 'climb FL330' and pointed at the new altitude. Passing through 32;200 FT Tokyo called and said '(Flight #) maintain FL310.' I began an immediate descent back to FL310. Prior to reaching FL310 Tokyo called us back and cleared us to FL330. There were a number of contributing factors; the biggest being hard to understand Controller's English. While I thought she said 'cleared FL330' the Captain understood her to say 'coordinating FL330.' There was also a lack of crew coordination; because even though I announced and pointed at the new altitude I am not sure if I got confirmation from the Captain. At this same time I was on the interphone with the cabin which was probably an added distraction.
Data retrieved from NASA's ASRS site as of April 2012 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.