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A LR45 pilot reports the autoplt altitude capture failed to capture the initial 1500 ft altitude because of the aircraft climb rate on the teb 5 departure.
| Attributes | |
| ACN | 658656 |
| Time | |
| Date | 200505 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : teb.airport |
| State Reference | NJ |
| Altitude | msl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Learjet 45 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Route In Use | departure sid : teb 5 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 90 flight time total : 2900 flight time type : 1000 |
| ASRS Report | 658656 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | airspace violation : entry altitude deviation : crossing restriction not met altitude deviation : excursion from assigned altitude altitude deviation : overshoot non adherence : published procedure non adherence : far non adherence : clearance |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued alert flight crew : returned to assigned altitude |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft Airspace Structure |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| Chart | sid : teb 5 |
Narrative:
Departed south from runway 24 on the teb 5 departure. Altitude preselect was set to 1500 ft. During takeoff autoplt was engaged at approximately 800 ft MSL. The heading bug was then turned to 280 degrees as per the departure. While configuring the heading the altitude is reaching leveloff of 1500 ft MSL. Since the aircraft was climbing at 1800-2000 ft per minute the autoplt could not react quick enough to level at 1500 ft MSL. The autoplt did attempt to level off approximately 1750 ft MSL; which is over the 1500 ft prescribed. At this point the autoplt was manually disconnected and an attempt was made to descend back down to 1500 ft MSL. During this exact moment the controller was questioning our altitude and we reported 1700 ft MSL.
Original NASA ASRS Text
Title: A LR45 PLT RPTS THE AUTOPLT ALT CAPTURE FAILED TO CAPTURE THE INITIAL 1500 FT ALT BECAUSE OF THE ACFT CLB RATE ON THE TEB 5 DEP.
Narrative: DEPARTED S FROM RWY 24 ON THE TEB 5 DEP. ALT PRESELECT WAS SET TO 1500 FT. DURING TKOF AUTOPLT WAS ENGAGED AT APPROX 800 FT MSL. THE HDG BUG WAS THEN TURNED TO 280 DEGS AS PER THE DEP. WHILE CONFIGURING THE HDG THE ALT IS REACHING LEVELOFF OF 1500 FT MSL. SINCE THE ACFT WAS CLBING AT 1800-2000 FT PER MINUTE THE AUTOPLT COULD NOT REACT QUICK ENOUGH TO LEVEL AT 1500 FT MSL. THE AUTOPLT DID ATTEMPT TO LEVEL OFF APPROX 1750 FT MSL; WHICH IS OVER THE 1500 FT PRESCRIBED. AT THIS POINT THE AUTOPLT WAS MANUALLY DISCONNECTED AND AN ATTEMPT WAS MADE TO DSND BACK DOWN TO 1500 FT MSL. DURING THIS EXACT MOMENT THE CTLR WAS QUESTIONING OUR ALT AND WE RPTED 1700 FT MSL.
Data retrieved from NASA's ASRS site as of January 2009 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.