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Medium large transport climbed above assigned altitude causing potential conflict with another aircraft.
| Attributes | |
| ACN | 95579 |
| Time | |
| Date | 198810 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : stl |
| State Reference | MO |
| Altitude | msl bound lower : 18000 msl bound upper : 18500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 19000 flight time type : 16000 |
| ASRS Report | 95579 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain instruction : trainee |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 18000 vertical : 500 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Upon departure from stl the flight was given a climb to 18000' due to southbound traffic at 19000. Pilot flying the aircraft levelled at 18000 on autoplt and started accelerating. The autoplt elevator servo out of trim light started blinking. Pilot disconnected autoplt but existing nose up trim zoomed aircraft off of altitude about 500'. He recovered immediately and returned to 18000'. Evidently this 5 second excursion set off center's alarm system because they questioned us and pointed out our traffic at 9 O'clock, 3 mi. Autoplt was written up at destination.
Original NASA ASRS Text
Title: MLG CLIMBED ABOVE ASSIGNED ALT CAUSING POTENTIAL CONFLICT WITH ANOTHER ACFT.
Narrative: UPON DEP FROM STL THE FLT WAS GIVEN A CLB TO 18000' DUE TO SBND TFC AT 19000. PLT FLYING THE ACFT LEVELLED AT 18000 ON AUTOPLT AND STARTED ACCELERATING. THE AUTOPLT ELEVATOR SERVO OUT OF TRIM LIGHT STARTED BLINKING. PLT DISCONNECTED AUTOPLT BUT EXISTING NOSE UP TRIM ZOOMED ACFT OFF OF ALT ABOUT 500'. HE RECOVERED IMMEDIATELY AND RETURNED TO 18000'. EVIDENTLY THIS 5 SECOND EXCURSION SET OFF CENTER'S ALARM SYS BECAUSE THEY QUESTIONED US AND POINTED OUT OUR TFC AT 9 O'CLOCK, 3 MI. AUTOPLT WAS WRITTEN UP AT DEST.
Data retrieved from NASA's ASRS site as of August 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.