 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Distracted by the failure of the number one air data computer the flight crew of a glf-iv climbed through their cleared altitude of 11000MSL and stopped at 12000 before advising ATC.
| Attributes | |
| ACN | 986517 |
| Time | |
| Date | 201112 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZLA.ARTCC |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | Gulfstream IV / G350 / G450 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Climb |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Air Data Computer |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 75 Flight Crew Total 5400 Flight Crew Type 1500 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 27 Flight Crew Total 12680 Flight Crew Type 1100 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Overshoot |
Narrative:
While climbing through 10;000 feet our number 1 air data computer became intermittent. This rendered our altitude; airspeed; angle of attack tapes and altitude preselect window inoperative. As we were dealing with the problem we passed through our assigned altitude of 11;000 feet. We then leveled off at 12;000 feet and immediately reported the problem to ATC. Per our QRH (quick reference handbook); we switched to the number 2 air data computer. This resolved our problem and we continued with our trip uneventfully. There were no conflicts with other traffic and ATC did not appear to be concerned. Once on the ground we trouble shot the problem and the number 1 air data computer functioned normally.
Original NASA ASRS Text
Title: Distracted by the failure of the Number one air data computer the Flight Crew of a GLF-IV climbed through their cleared altitude of 11000MSL and stopped at 12000 before advising ATC.
Narrative: While climbing through 10;000 feet our Number 1 Air Data Computer became intermittent. This rendered our Altitude; Airspeed; Angle of Attack tapes and Altitude Preselect Window inoperative. As we were dealing with the problem we passed through our assigned altitude of 11;000 feet. We then leveled off at 12;000 feet and immediately reported the problem to ATC. Per our QRH (Quick Reference Handbook); we switched to the Number 2 Air Data Computer. This resolved our problem and we continued with our trip uneventfully. There were no conflicts with other traffic and ATC did not appear to be concerned. Once on the ground we trouble shot the problem and the Number 1 Air Data Computer functioned normally.
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.