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Medium large transport lands at iad with left engine at idle power because of high vibration readings.
| Attributes | |
| ACN | 195593 |
| Time | |
| Date | 199111 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : iad |
| State Reference | VA |
| Altitude | msl bound lower : 29000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iad |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 10000 flight time type : 1000 |
| ASRS Report | 195593 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 7200 flight time type : 1200 |
| ASRS Report | 195806 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Vibration on #1 engine began to cycle between 1 and 2 units with accompanying airframe vibration. On descent with throttles retarded to approximately 65 percent a vibration went to 3-3.5 units steady with airframe vibration still evident. Shot single engine type flaps 15 approach with #1 engine at idle. At idle setting vibration was nil/0. Advised maintenance, dispatch and ATC of problem and had iad emergency vehicles standby for landing.
Original NASA ASRS Text
Title: MLG LANDS AT IAD WITH L ENG AT IDLE PWR BECAUSE OF HIGH VIBRATION READINGS.
Narrative: VIBRATION ON #1 ENG BEGAN TO CYCLE BTWN 1 AND 2 UNITS WITH ACCOMPANYING AIRFRAME VIBRATION. ON DSCNT WITH THROTTLES RETARDED TO APPROX 65 PERCENT A VIBRATION WENT TO 3-3.5 UNITS STEADY WITH AIRFRAME VIBRATION STILL EVIDENT. SHOT SINGLE ENG TYPE FLAPS 15 APCH WITH #1 ENG AT IDLE. AT IDLE SETTING VIBRATION WAS NIL/0. ADVISED MAINT, DISPATCH AND ATC OF PROBLEM AND HAD IAD EMER VEHICLES STANDBY FOR LNDG.
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.