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Return land mandated by aircraft equipment problem malfunction in a commuter light transport. Overweight landing performed.
| Attributes | |
| ACN | 307205 |
| Time | |
| Date | 199506 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mke |
| State Reference | WI |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude landing other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 176 flight time total : 2500 flight time type : 75 |
| ASRS Report | 307205 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
During takeoff roll and on climb out a vibration was detected by myself and the captain. The captain tapped the foot brakes to stop a suspected rolling of the tires in the wheel wells. This did not stop the vibration. I selected a different propeller RPM setting to stop the vibration. Again to no avail. At approximately 7000 ft MSL a loud pop was heard from the left engine as well as a yaw towards that side and propeller RPM deviations of from 1450-1600 rpms before stabilizing at 1550 RPM. Both the captain and I decided to return to mke where after the ILS to runway 1L we landed approximately 200 pounds overweight. I believe the only way this could have been avoided would have been to fly around long enough to burn off 200 pounds of fuel. But in the situation we didn't know how serious the problem with the propeller was so we thought the best thing to do was to get the plane on the ground.
Original NASA ASRS Text
Title: RETURN LAND MANDATED BY ACFT EQUIP PROB MALFUNCTION IN A COMMUTER LTT. OVERWT LNDG PERFORMED.
Narrative: DURING TKOF ROLL AND ON CLBOUT A VIBRATION WAS DETECTED BY MYSELF AND THE CAPT. THE CAPT TAPPED THE FOOT BRAKES TO STOP A SUSPECTED ROLLING OF THE TIRES IN THE WHEEL WELLS. THIS DID NOT STOP THE VIBRATION. I SELECTED A DIFFERENT PROP RPM SETTING TO STOP THE VIBRATION. AGAIN TO NO AVAIL. AT APPROX 7000 FT MSL A LOUD POP WAS HEARD FROM THE L ENG AS WELL AS A YAW TOWARDS THAT SIDE AND PROP RPM DEVS OF FROM 1450-1600 RPMS BEFORE STABILIZING AT 1550 RPM. BOTH THE CAPT AND I DECIDED TO RETURN TO MKE WHERE AFTER THE ILS TO RWY 1L WE LANDED APPROX 200 LBS OVERWT. I BELIEVE THE ONLY WAY THIS COULD HAVE BEEN AVOIDED WOULD HAVE BEEN TO FLY AROUND LONG ENOUGH TO BURN OFF 200 LBS OF FUEL. BUT IN THE SIT WE DIDN'T KNOW HOW SERIOUS THE PROB WITH THE PROP WAS SO WE THOUGHT THE BEST THING TO DO WAS TO GET THE PLANE ON THE GND.
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.