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An airbus 300 in cruise at FL270 declares an emergency and makes an overweight landing due to combination of deferred system and in-flight failures.
| Attributes | |
| ACN | 478171 |
| Time | |
| Date | 200007 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : jfk.airport |
| State Reference | NY |
| Altitude | msl single value : 27000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 478717 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : company policies non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : diverted to another airport |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : fault isolation performance deficiency : repair performance deficiency : testing |
| Supplementary | |
| Problem Areas | Company Aircraft Maintenance Human Performance Flight Crew Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft was dispatched with inoperative and placarded #1 IRS -- #1 yaw dampener and overhead IRS display inoperative. On takeoff roll, captain's speed limits failed along with #1 pitch trim and TCASII. Discussions with maintenance technician concluded that there was partial failure of air data computer #1. I took into account the possibility of 1) a second air data computer computer failure would reduce us to standby instruments only. 2) route over atlantic at night. 3) other placards and failures that the flight was dispatched with. I felt that the prudent course of action was to return to jfk. Per part I manual for overweight landing, an emergency was declared. Landing weight was declared. Landing weight 322000 pounds at 200 FPM -- smooth. Xferred passenger, crew and cargo to other aircraft. Flight proceeded to sdq.
Original NASA ASRS Text
Title: AN AIRBUS 300 IN CRUISE AT FL270 DECLARES AN EMER AND MAKES AN OVERWT LNDG DUE TO COMBINATION OF DEFERRED SYS AND INFLT FAILURES.
Narrative: ACFT WAS DISPATCHED WITH INOP AND PLACARDED #1 IRS -- #1 YAW DAMPENER AND OVERHEAD IRS DISPLAY INOP. ON TKOF ROLL, CAPT'S SPD LIMITS FAILED ALONG WITH #1 PITCH TRIM AND TCASII. DISCUSSIONS WITH MAINT TECHNICIAN CONCLUDED THAT THERE WAS PARTIAL FAILURE OF ADC #1. I TOOK INTO ACCOUNT THE POSSIBILITY OF 1) A SECOND ADC COMPUTER FAILURE WOULD REDUCE US TO STANDBY INSTS ONLY. 2) RTE OVER ATLANTIC AT NIGHT. 3) OTHER PLACARDS AND FAILURES THAT THE FLT WAS DISPATCHED WITH. I FELT THAT THE PRUDENT COURSE OF ACTION WAS TO RETURN TO JFK. PER PART I MANUAL FOR OVERWT LNDG, AN EMER WAS DECLARED. LNDG WT WAS DECLARED. LNDG WT 322000 LBS AT 200 FPM -- SMOOTH. XFERRED PAX, CREW AND CARGO TO OTHER ACFT. FLT PROCEEDED TO SDQ.
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.