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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier widebody transport holding at lendy intersection FL200, altitude hold switch tripped off resulting in altitude deviation of 300 ft, got 19700 ft. First officer, PF, corrected back to assigned altitude. Captain and so discussing fuel remaining with dispatch.
| Attributes | |
| ACN | 350534 |
| Time | |
| Date | 199610 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lga |
| State Reference | NY |
| Altitude | msl bound lower : 19700 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny tracon : mci |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 160 flight time total : 14500 flight time type : 5000 |
| ASRS Report | 350534 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 20500 flight time type : 3600 |
| ASRS Report | 350533 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Holding at lendy intersection, autoplt attitude hold switch tripped off in turn. I (first officer) tripped autoplt off and climbed back to FL200. During recovery, center asked about altitude. 300 ft low. Captain was talking to dispatch at time of deviation. Maximum 300 ft deviation below altitude, momentarily.
Original NASA ASRS Text
Title: ACR WDB HOLDING AT LENDY INTXN FL200, ALT HOLD SWITCH TRIPPED OFF RESULTING IN ALTDEV OF 300 FT, GOT 19700 FT. FO, PF, CORRECTED BACK TO ASSIGNED ALT. CAPT AND SO DISCUSSING FUEL REMAINING WITH DISPATCH.
Narrative: HOLDING AT LENDY INTXN, AUTOPLT ATTITUDE HOLD SWITCH TRIPPED OFF IN TURN. I (FO) TRIPPED AUTOPLT OFF AND CLBED BACK TO FL200. DURING RECOVERY, CTR ASKED ABOUT ALT. 300 FT LOW. CAPT WAS TALKING TO DISPATCH AT TIME OF DEV. MAX 300 FT DEV BELOW ALT, MOMENTARILY.
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.