Large transport has vibration shimmy on takeoff. Loud bang heard by cabin attendant, masks drop.

Attributes
ACN	257408
Time
Date	199311
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ewr
State Reference	NJ
Altitude	agl bound lower : 0 agl bound upper : 500
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	tower : ewr
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 190 flight time total : 8500 flight time type : 190
ASRS Report	257408
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	flight crew : declared emergency other
Consequence	other Other
Supplementary
Primary Problem	Airport

Narrative:

On takeoff above 100 KTS, noticed vibration and shimmy off aircraft. Suspected rough runway due to recent paving at ewr runway 4L. After rotation (V1, vr) aircraft seemed fine. As precaution we advised tower to check runway for possible tire damage, which they did. Aircraft behind us for takeoff noted loud bank. Passenger and flight attendants noted loud bang and masks dropped. We departed the airport area and asked to hold at solberg VOR to confer with our maintenance department. Initially, they advised us to continue to our destination, atl, but after crew discussion, captain exercised his emergency authority, and we burned down fuel and returned to ewr. Landing and approach were uneventful. We rolled out on runway 4R and had the gear inspected and pinned. Damage to aircraft was inboard main tire shredded by foreign object damage. Right inboard trailing edge flaps dented and #3 engine C1 compressor 6 damaged blades. Tower advised that an aircraft part (later determined to be from an medium large transport) was found on the runway. We suspect this caused the damage. Always go for the safest course of action. In hindsight, we probably should have left the gear down after rotation, but all cockpit indications were normal so we assumed a normal scenario on bumpy runway.

Original NASA ASRS Text

Title: LGT HAS VIBRATION SHIMMY ON TKOF. LOUD BANG HEARD BY CABIN ATTENDANT, MASKS DROP.

Narrative: ON TKOF ABOVE 100 KTS, NOTICED VIBRATION AND SHIMMY OFF ACFT. SUSPECTED ROUGH RWY DUE TO RECENT PAVING AT EWR RWY 4L. AFTER ROTATION (V1, VR) ACFT SEEMED FINE. AS PRECAUTION WE ADVISED TWR TO CHK RWY FOR POSSIBLE TIRE DAMAGE, WHICH THEY DID. ACFT BEHIND US FOR TKOF NOTED LOUD BANK. PAX AND FLT ATTENDANTS NOTED LOUD BANG AND MASKS DROPPED. WE DEPARTED THE ARPT AREA AND ASKED TO HOLD AT SOLBERG VOR TO CONFER WITH OUR MAINT DEPT. INITIALLY, THEY ADVISED US TO CONTINUE TO OUR DEST, ATL, BUT AFTER CREW DISCUSSION, CAPT EXERCISED HIS EMER AUTHORITY, AND WE BURNED DOWN FUEL AND RETURNED TO EWR. LNDG AND APCH WERE UNEVENTFUL. WE ROLLED OUT ON RWY 4R AND HAD THE GEAR INSPECTED AND PINNED. DAMAGE TO ACFT WAS INBOARD MAIN TIRE SHREDDED BY FOREIGN OBJECT DAMAGE. R INBOARD TRAILING EDGE FLAPS DENTED AND #3 ENG C1 COMPRESSOR 6 DAMAGED BLADES. TWR ADVISED THAT AN ACFT PART (LATER DETERMINED TO BE FROM AN MLG) WAS FOUND ON THE RWY. WE SUSPECT THIS CAUSED THE DAMAGE. ALWAYS GO FOR THE SAFEST COURSE OF ACTION. IN HINDSIGHT, WE PROBABLY SHOULD HAVE LEFT THE GEAR DOWN AFTER ROTATION, BUT ALL COCKPIT INDICATIONS WERE NORMAL SO WE ASSUMED A NORMAL SCENARIO ON BUMPY RWY.

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.