 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
CL601 captain reports possible tail icing during approach. Flaps 45 causes rumbling and flaps 30 are used for landing.
| Attributes | |
| ACN | 813826 |
| Time | |
| Date | 200811 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl bound lower : 800 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon tracon : a90.tracon |
| Operator | common carrier : charter |
| Make Model Name | Challenger CL601 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 60 flight time total : 5600 flight time type : 7000 |
| ASRS Report | 813826 |
| Events | |
| Anomaly | inflight encounter : weather |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : took precautionary avoidance action |
| Supplementary | |
| Problem Areas | Aircraft Weather |
| Primary Problem | Ambiguous |
Narrative:
Encountered tail icing on descent into ZZZ. We were at 4000 ft on top of the cloud layer in VMC conditions; approximately -19C. I had turned on the cowl and wing anti-ice about 3 mins prior to entering the cloud layer. We were cleared from 4000 ft to 2100 ft and given a turn to intercept the localizer for runway 26L. The descent was done at 250 KTS to 2100 ft and then I began to reduce power to configure for approach and landing. Confign changes were done in accordance with the training procedures. When I called for flaps 45 degrees at around 1200 ft AGL I felt a rumbling sensation. I immediately looked at my spoilers to make sure that they were stowed; which they were. We broke out at 800 ft and I called to have the flaps retracted back to 30 degrees. The rumbling stopped. Conditions on the field were winds out of the northwest at 9 KTS visibility 6 mi and 800 ft overcast. Temperature -01C altimeter 29.37.
Original NASA ASRS Text
Title: CL601 CAPTAIN REPORTS POSSIBLE TAIL ICING DURING APPROACH. FLAPS 45 CAUSES RUMBLING AND FLAPS 30 ARE USED FOR LANDING.
Narrative: ENCOUNTERED TAIL ICING ON DSCNT INTO ZZZ. WE WERE AT 4000 FT ON TOP OF THE CLOUD LAYER IN VMC CONDITIONS; APPROX -19C. I HAD TURNED ON THE COWL AND WING ANTI-ICE ABOUT 3 MINS PRIOR TO ENTERING THE CLOUD LAYER. WE WERE CLRED FROM 4000 FT TO 2100 FT AND GIVEN A TURN TO INTERCEPT THE LOC FOR RWY 26L. THE DSCNT WAS DONE AT 250 KTS TO 2100 FT AND THEN I BEGAN TO REDUCE PWR TO CONFIGURE FOR APCH AND LNDG. CONFIGN CHANGES WERE DONE IN ACCORDANCE WITH THE TRAINING PROCS. WHEN I CALLED FOR FLAPS 45 DEGS AT AROUND 1200 FT AGL I FELT A RUMBLING SENSATION. I IMMEDIATELY LOOKED AT MY SPOILERS TO MAKE SURE THAT THEY WERE STOWED; WHICH THEY WERE. WE BROKE OUT AT 800 FT AND I CALLED TO HAVE THE FLAPS RETRACTED BACK TO 30 DEGS. THE RUMBLING STOPPED. CONDITIONS ON THE FIELD WERE WINDS OUT OF THE NW AT 9 KTS VISIBILITY 6 MI AND 800 FT OVCST. TEMP -01C ALTIMETER 29.37.
Data retrieved from NASA's ASRS site as of May 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.