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An A319 pilot reports a vertical airframe vibration at FL280 mach .78; 328 KTS while descending. Vibration ceased with 10 KTS airspeed decrease.
| Attributes | |
| ACN | 700372 |
| Time | |
| Date | 200606 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zny.artcc |
| State Reference | NY |
| Altitude | msl single value : 28000 |
| Environment | |
| Weather Elements | other |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : n/s |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 220 flight time total : 9500 flight time type : 4500 |
| ASRS Report | 700372 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited penetrated airspace |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On descent leaving FL280 at approximately .78 mach with aircraft autoplt #2 engaged; aircraft experienced moderate airframe vibration. Switched autoplt #2 off; deployed speed brakes and slowed aircraft. Vibration disappeared after slowing approximately 10 KTS. No ECAM or overspd; all flight controls and system were normal. Vibration did not return. Reported vibration to maintenance. Vibration report filed.
Original NASA ASRS Text
Title: AN A319 PLT RPTS A VERT AIRFRAME VIBRATION AT FL280 MACH .78; 328 KTS WHILE DSNDING. VIBRATION CEASED WITH 10 KTS AIRSPD DECREASE.
Narrative: ON DSCNT LEAVING FL280 AT APPROX .78 MACH WITH ACFT AUTOPLT #2 ENGAGED; ACFT EXPERIENCED MODERATE AIRFRAME VIBRATION. SWITCHED AUTOPLT #2 OFF; DEPLOYED SPD BRAKES AND SLOWED ACFT. VIBRATION DISAPPEARED AFTER SLOWING APPROX 10 KTS. NO ECAM OR OVERSPD; ALL FLT CTLS AND SYS WERE NORMAL. VIBRATION DID NOT RETURN. RPTED VIBRATION TO MAINT. VIBRATION RPT FILED.
Data retrieved from NASA's ASRS site as of January 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.