A fokker 100 during replacement of the left main landing gear shimmy damper, a spacer ring was insta...

Attributes
ACN	391033
Time
Date	199712
Day	Fri
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	391033
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	389997
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other
Situations
Publication	Unspecified

Narrative:

On dec/xx/97 I was involved in the replacement of l-hand main gear shimmy damper on aircraft xyz. As inspector, I inspected removed parts and installation of new shimmy damper as per maintenance manual. Item in question is spacer #7 being installed backwards. The maintenance manual does not specify what direction it should be installed. The job was completed and aircraft was released for flight. On dec/xa/97 while inspecting another shimmy damper replacement on another aircraft, it was noted that the spacer (#7) should be installed with small radius toward damper. Maintenance control was notified to check aircraft xyz for proper spacer installation. Maintenance control generated work release item yyyww to check spacer. It was found to be installed backward. The spacer direction was corrected and aircraft xyz was released for flight. Maintenance manuals should be revised to reflect the proper installation of this spacer.

Original NASA ASRS Text

Title: A FOKKER 100 DURING REPLACEMENT OF THE L MAIN LNDG GEAR SHIMMY DAMPER, A SPACER RING WAS INSTALLED INCORRECTLY DUE TO NO MAINT MANUAL SPEC.

Narrative: ON DEC/XX/97 I WAS INVOLVED IN THE REPLACEMENT OF L-HAND MAIN GEAR SHIMMY DAMPER ON ACFT XYZ. AS INSPECTOR, I INSPECTED REMOVED PARTS AND INSTALLATION OF NEW SHIMMY DAMPER AS PER MAINT MANUAL. ITEM IN QUESTION IS SPACER #7 BEING INSTALLED BACKWARDS. THE MAINT MANUAL DOES NOT SPECIFY WHAT DIRECTION IT SHOULD BE INSTALLED. THE JOB WAS COMPLETED AND ACFT WAS RELEASED FOR FLT. ON DEC/XA/97 WHILE INSPECTING ANOTHER SHIMMY DAMPER REPLACEMENT ON ANOTHER ACFT, IT WAS NOTED THAT THE SPACER (#7) SHOULD BE INSTALLED WITH SMALL RADIUS TOWARD DAMPER. MAINT CTL WAS NOTIFIED TO CHK ACFT XYZ FOR PROPER SPACER INSTALLATION. MAINT CTL GENERATED WORK RELEASE ITEM YYYWW TO CHK SPACER. IT WAS FOUND TO BE INSTALLED BACKWARD. THE SPACER DIRECTION WAS CORRECTED AND ACFT XYZ WAS RELEASED FOR FLT. MAINT MANUALS SHOULD BE REVISED TO REFLECT THE PROPER INSTALLATION OF THIS SPACER.

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.

A fokker 100 during replacement of the left main landing gear shimmy damper, a spacer ring was installed incorrectly due to no maintenance manual specification.