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A fokker 100 holding at 15000 ft in icing conditions declared an emergency and diverted due to strong #1 engine vibration caused by partial failure of the engine anti-ice system.
| Attributes | |
| ACN | 470738 |
| Time | |
| Date | 200004 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : clt.airport |
| State Reference | NC |
| Altitude | msl single value : 15000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Ice Rain |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : holding |
| Route In Use | arrival star : unarm one arrv. |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 13000 flight time type : 2500 |
| ASRS Report | 470738 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter : weather other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : engine vibration warning other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport |
| Consequence | other |
| Supplementary | |
| Problem Areas | Weather Environmental Factor Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
During holding at unarm intersection (clt STAR) at 15000 ft MSL, the #1 engine vibration alert activated. There was a strong airframe vibration. The problem came and went 2 more times and we declared an emergency and landed at clt. I suspect the engine anti-ice on the #1 engine was not operating at proper capacity. Callback conversation with reporter revealed the following information: the reporter stated at first the vibration warning alerted the crew then the strong vibration was felt. The reporter said we were flying in icing conditions and as the aircraft descended the vibration abated. The reporter stated maintenance discovered the nose spinner was not being anti-iced.
Original NASA ASRS Text
Title: A FOKKER 100 HOLDING AT 15000 FT IN ICING CONDITIONS DECLARED AN EMER AND DIVERTED DUE TO STRONG #1 ENG VIBRATION CAUSED BY PARTIAL FAILURE OF THE ENG ANTI-ICE SYS.
Narrative: DURING HOLDING AT UNARM INTXN (CLT STAR) AT 15000 FT MSL, THE #1 ENG VIBRATION ALERT ACTIVATED. THERE WAS A STRONG AIRFRAME VIBRATION. THE PROB CAME AND WENT 2 MORE TIMES AND WE DECLARED AN EMER AND LANDED AT CLT. I SUSPECT THE ENG ANTI-ICE ON THE #1 ENG WAS NOT OPERATING AT PROPER CAPACITY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED AT FIRST THE VIBRATION WARNING ALERTED THE CREW THEN THE STRONG VIBRATION WAS FELT. THE RPTR SAID WE WERE FLYING IN ICING CONDITIONS AND AS THE ACFT DSNDED THE VIBRATION ABATED. THE RPTR STATED MAINT DISCOVERED THE NOSE SPINNER WAS NOT BEING ANTI-ICED.
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.