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Canadair CL65. In climb at 15000 ft, a vibration was felt in the cockpit. All instruments, flight controls were normal. On approach at 7000 ft, vibration ceased. Caused by #1 engine reverser fairing departing aircraft.
| Attributes | |
| ACN | 496772 |
| Time | |
| Date | 200101 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : msp.airport |
| State Reference | MN |
| Altitude | msl bound lower : 7000 msl bound upper : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp.artcc tower : stl.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : multi engine |
| Experience | flight time last 90 days : 200 flight time total : 7000 flight time type : 800 |
| ASRS Report | 496772 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 70 flight time total : 2650 flight time type : 70 |
| ASRS Report | 496775 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other |
| Supplementary | |
| Problem Areas | Environmental Factor Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
Reported for flight. Mechanic on board stated that #1 'a' system jet pipe overheat detection loop was not operating normally and he would defer it. Normal preflight duties, taxi and takeoff occurred without incident. During climb, felt vibration. All gauges, readouts and synoptic pages, as well as aircraft control, were normal. Contacted maintenance and troubleshot the vibration, but could find nothing unusual. Flight attendant reported passenger were neither concerned nor aware of the vibration. Flight continued and vibration remained unchanged until leveling off at 7000 ft on approach to cvg. At that time there was a bump felt and the vibration stopped completely. Again all gauges, readouts, synoptic pages and aircraft control were normal. Landed and taxied to the gate without incident. Postflt inspection revealed #1 exhaust fairing missing.
Original NASA ASRS Text
Title: CANADAIR CL65. IN CLB AT 15000 FT, A VIBRATION WAS FELT IN THE COCKPIT. ALL INSTS, FLT CTLS WERE NORMAL. ON APCH AT 7000 FT, VIBRATION CEASED. CAUSED BY #1 ENG REVERSER FAIRING DEPARTING ACFT.
Narrative: RPTED FOR FLT. MECH ON BOARD STATED THAT #1 'A' SYS JET PIPE OVERHEAT DETECTION LOOP WAS NOT OPERATING NORMALLY AND HE WOULD DEFER IT. NORMAL PREFLT DUTIES, TAXI AND TKOF OCCURRED WITHOUT INCIDENT. DURING CLB, FELT VIBRATION. ALL GAUGES, READOUTS AND SYNOPTIC PAGES, AS WELL AS ACFT CTL, WERE NORMAL. CONTACTED MAINT AND TROUBLESHOT THE VIBRATION, BUT COULD FIND NOTHING UNUSUAL. FLT ATTENDANT RPTED PAX WERE NEITHER CONCERNED NOR AWARE OF THE VIBRATION. FLT CONTINUED AND VIBRATION REMAINED UNCHANGED UNTIL LEVELING OFF AT 7000 FT ON APCH TO CVG. AT THAT TIME THERE WAS A BUMP FELT AND THE VIBRATION STOPPED COMPLETELY. AGAIN ALL GAUGES, READOUTS, SYNOPTIC PAGES AND ACFT CTL WERE NORMAL. LANDED AND TAXIED TO THE GATE WITHOUT INCIDENT. POSTFLT INSPECTION REVEALED #1 EXHAUST FAIRING MISSING.
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.