<< >> NASA ASRS Report 393134, January 1998

A DC9 shortly after takeoff declared an emergency and returned to the field due to the right nose gear thrown thread on takeoff roll.

Attributes
ACN	393134
Time
Date	199801
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : iah
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : iah
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : takeoff other other
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 8000 flight time type : 1400
ASRS Report	393134
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
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
Supplementary
Primary Problem	Aircraft

Narrative:

About 130 KTS during takeoff noticed what appeared to be nosewheel shimmy -- have experienced similar shimmy before which was caused by nosewheel. When gear retracted, smell of burnt rubber permeated airplane. Called back to houston tower and requested they check the runway. Strip of tire found that we assumed to be ours. Declared an emergency, held with gear down to burn fuel below our maximum gross landing weight, did a tower fly-by for verification of tire failure and which tire failed. They had a spot light, but were unable to tell which tire failed. Landed straight ahead on longest runway, had gear pinned, taxied back to gate using left engine only (turns out right inboard was the tire that failed).

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Original NASA ASRS Text

Title: A DC9 SHORTLY AFTER TKOF DECLARED AN EMER AND RETURNED TO THE FIELD DUE TO THE R NOSE GEAR THROWN THREAD ON TKOF ROLL.

Narrative: ABOUT 130 KTS DURING TKOF NOTICED WHAT APPEARED TO BE NOSEWHEEL SHIMMY -- HAVE EXPERIENCED SIMILAR SHIMMY BEFORE WHICH WAS CAUSED BY NOSEWHEEL. WHEN GEAR RETRACTED, SMELL OF BURNT RUBBER PERMEATED AIRPLANE. CALLED BACK TO HOUSTON TWR AND REQUESTED THEY CHK THE RWY. STRIP OF TIRE FOUND THAT WE ASSUMED TO BE OURS. DECLARED AN EMER, HELD WITH GEAR DOWN TO BURN FUEL BELOW OUR MAX GROSS LNDG WT, DID A TWR FLY-BY FOR VERIFICATION OF TIRE FAILURE AND WHICH TIRE FAILED. THEY HAD A SPOT LIGHT, BUT WERE UNABLE TO TELL WHICH TIRE FAILED. LANDED STRAIGHT AHEAD ON LONGEST RWY, HAD GEAR PINNED, TAXIED BACK TO GATE USING L ENG ONLY (TURNS OUT R INBOARD WAS THE TIRE THAT FAILED).

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.