 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Upon intercepting the lga localizer runway 22 final approach course; an A320 commenced an uncommanded climb. The autoplt was disconnected and approach continued.
| Attributes | |
| ACN | 673993 |
| Time | |
| Date | 200510 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lga.airport |
| State Reference | NY |
| Altitude | msl single value : 4000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 22 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Route In Use | approach : instrument precision |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 200 flight time total : 4000 flight time type : 1300 |
| ASRS Report | 673993 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
With lga approach; 4000 ft; flaps 2 degrees; 190 KIAS. Autoplt/autothrottles on. Given turn to 190 degrees to intercept localizer runway 22; cross yoman 3000 ft or above. In the turn we captured the localizer and the aircraft started an uncommanded climb. All automation was disconnected and aircraft flown back to altitude of 3000 ft at yoman. Estimated climb altitude of 4850 ft. Completed the approach to landing. Callback conversation with reporter revealed the following information: reporter stated that his air carrier has several aircraft in the airbus fleet that upon localizer capture will climb to the GS if below it at the time of capture. The crew thought this was odd behavior also and called the air carrier training department. They were notified that the pilot's handbook discusses the aircraft in the fleet that are exceptions to the normal capture behavior.
Original NASA ASRS Text
Title: UPON INTERCEPTING THE LGA LOC RWY 22 FINAL APCH COURSE; AN A320 COMMENCED AN UNCOMMANDED CLB. THE AUTOPLT WAS DISCONNECTED AND APCH CONTINUED.
Narrative: WITH LGA APCH; 4000 FT; FLAPS 2 DEGS; 190 KIAS. AUTOPLT/AUTOTHROTTLES ON. GIVEN TURN TO 190 DEGS TO INTERCEPT LOC RWY 22; CROSS YOMAN 3000 FT OR ABOVE. IN THE TURN WE CAPTURED THE LOC AND THE ACFT STARTED AN UNCOMMANDED CLB. ALL AUTOMATION WAS DISCONNECTED AND ACFT FLOWN BACK TO ALT OF 3000 FT AT YOMAN. ESTIMATED CLB ALT OF 4850 FT. COMPLETED THE APCH TO LNDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HIS ACR HAS SEVERAL ACFT IN THE AIRBUS FLEET THAT UPON LOC CAPTURE WILL CLB TO THE GS IF BELOW IT AT THE TIME OF CAPTURE. THE CREW THOUGHT THIS WAS ODD BEHAVIOR ALSO AND CALLED THE ACR TRAINING DEPT. THEY WERE NOTIFIED THAT THE PLT'S HANDBOOK DISCUSSES THE ACFT IN THE FLEET THAT ARE EXCEPTIONS TO THE NORMAL CAPTURE BEHAVIOR.
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.