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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Altitude excursion by a B747 on a foreign country SID. The flight crew caught the drift off altitude, as well as ATC, and were advised that there was another aircraft assigned 1000 ft above their altitude. The first officer made a manual, immediate correction.
| Attributes | |
| ACN | 404010 |
| Time | |
| Date | 199805 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lgw airport : lon |
| State Reference | FO |
| Altitude | msl bound lower : 8000 msl bound upper : 8200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lgw |
| Operator | common carrier : air carrier |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 60 flight time total : 13000 flight time type : 1000 |
| ASRS Report | 404010 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | vertical : 800 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After leveling off at 8000 ft, altitude hold on, autoplt on. Aircraft climbed to 8200 ft. PF disengaged autoplt and hand flew back to level 8000 ft. London control then told us of other aircraft at 9000 ft. Got TCASII warning. We were VFR on top, never saw other aircraft. Remainder of flight normal, autoplt ok.
Original NASA ASRS Text
Title: ALT EXCURSION BY A B747 ON A FOREIGN COUNTRY SID. THE FLC CAUGHT THE DRIFT OFF ALT, AS WELL AS ATC, AND WERE ADVISED THAT THERE WAS ANOTHER ACFT ASSIGNED 1000 FT ABOVE THEIR ALT. THE FO MADE A MANUAL, IMMEDIATE CORRECTION.
Narrative: AFTER LEVELING OFF AT 8000 FT, ALT HOLD ON, AUTOPLT ON. ACFT CLBED TO 8200 FT. PF DISENGAGED AUTOPLT AND HAND FLEW BACK TO LEVEL 8000 FT. LONDON CTL THEN TOLD US OF OTHER ACFT AT 9000 FT. GOT TCASII WARNING. WE WERE VFR ON TOP, NEVER SAW OTHER ACFT. REMAINDER OF FLT NORMAL, AUTOPLT OK.
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.