Light transport return land lga due to vibration caused by a loose deicing boot.

Attributes
ACN	251309
Time
Date	199309
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lga
State Reference	NY
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7700 flight time type : 1700
ASRS Report	251309
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

After takeoff from lga, the aircraft encountered a strong vibration of unknown origin. A return to and safe landing at lga was accomplished. An emergency was not declared. After post-flight inspection, it was determined that the top section of the r-hand stabilizer deice boot had separated from the stabilizer. This served to disrupt airflow over the stabilizer, thus creating the vibration which was felt throughout the entire airframe. After examining all the factual evidence, I believe that a mechanic may have forgotten to glue the top surface of the r-hand stabilizer boot to the stabilizer. The boot then gradually pulled away from the stabilizer.

Original NASA ASRS Text

Title: LTT RETURN LAND LGA DUE TO VIBRATION CAUSED BY A LOOSE DEICING BOOT.

Narrative: AFTER TKOF FROM LGA, THE ACFT ENCOUNTERED A STRONG VIBRATION OF UNKNOWN ORIGIN. A RETURN TO AND SAFE LNDG AT LGA WAS ACCOMPLISHED. AN EMER WAS NOT DECLARED. AFTER POST-FLT INSPECTION, IT WAS DETERMINED THAT THE TOP SECTION OF THE R-HAND STABILIZER DEICE BOOT HAD SEPARATED FROM THE STABILIZER. THIS SERVED TO DISRUPT AIRFLOW OVER THE STABILIZER, THUS CREATING THE VIBRATION WHICH WAS FELT THROUGHOUT THE ENTIRE AIRFRAME. AFTER EXAMINING ALL THE FACTUAL EVIDENCE, I BELIEVE THAT A MECH MAY HAVE FORGOTTEN TO GLUE THE TOP SURFACE OF THE R-HAND STABILIZER BOOT TO THE STABILIZER. THE BOOT THEN GRADUALLY PULLED AWAY FROM THE STABILIZER.

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.