Air carrier large transport hit unknown object at FL290 causing dent in inboard section of right win...

Attributes
ACN	103704
Time
Date	198902
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ott
State Reference	MD
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Route In Use	arrival star : star enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 18000 flight time type : 12000
ASRS Report	103704
Events
Anomaly	inflight encounter other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Aircraft was on nanci 2 arrival to lga in the area of ott VOR (113.7) at FL290 and being radar vectored for flow control into lga when crew felt and heard a definite 'thump' on the aircraft. Engine instruments indicated normal at all times and no abnormal control was noticed. After landing at lga I visually inspected the aircraft exterior and found 6' diameter dent approximately 1' deep on leading edge of right wing just inboard of the leading edge flaps. Damaged area was not gouged or scraped nor was there any residue from a bird strike. No other visibility damage was noted. Also, there was no abnormal indication of fluid leaking from the forward lav servicing door.

Original NASA ASRS Text

Title: ACR LGT HIT UNKNOWN OBJECT AT FL290 CAUSING DENT IN INBOARD SECTION OF RIGHT WING.

Narrative: ACFT WAS ON NANCI 2 ARR TO LGA IN THE AREA OF OTT VOR (113.7) AT FL290 AND BEING RADAR VECTORED FOR FLOW CTL INTO LGA WHEN CREW FELT AND HEARD A DEFINITE 'THUMP' ON THE ACFT. ENG INSTRUMENTS INDICATED NORMAL AT ALL TIMES AND NO ABNORMAL CONTROL WAS NOTICED. AFTER LNDG AT LGA I VISUALLY INSPECTED THE ACFT EXTERIOR AND FOUND 6' DIAMETER DENT APPROX 1' DEEP ON LEADING EDGE OF RIGHT WING JUST INBOARD OF THE LEADING EDGE FLAPS. DAMAGED AREA WAS NOT GOUGED OR SCRAPED NOR WAS THERE ANY RESIDUE FROM A BIRD STRIKE. NO OTHER VIS DAMAGE WAS NOTED. ALSO, THERE WAS NO ABNORMAL INDICATION OF FLUID LEAKING FROM THE FORWARD LAV SERVICING DOOR.

Data retrieved from NASA's ASRS site as of August 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.

Air carrier large transport hit unknown object at FL290 causing dent in inboard section of right wing.