A DC10-30F was dispatched with the nose gear shock strut and ctring cam built up improperly.

Attributes
ACN	425326
Time
Date	199901
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	DC-10 30F
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	425326
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	other
Situations
Publication	Unspecified

Narrative:

During repack of nose landing gear strut seals, top half of ctring cam was installed 90 degrees. This kept strut from fully extending when aircraft is in-flight preventing nose landing gear retraction. Maintenance manual does not mention checking for proper alignment nor does it call for a gear swing upon completion of inner cylinder installation. Callback conversation with reporter revealed the following information: the reporter stated the problem was the upper ctring cam assembly has 4 keyways 90 degrees apart and this assembly can be installed only 1 correct way and this situation was not noted in the maintenance manual. The reporter said the manual gave no correct minimum strut extension which would have caught the error before taking the aircraft off the nose jacks. The reporter stated the company has allowed all the people involved in the strut build up to add to upgrading all the class 1 documents covering this job.

Original NASA ASRS Text

Title: A DC10-30F WAS DISPATCHED WITH THE NOSE GEAR SHOCK STRUT AND CTRING CAM BUILT UP IMPROPERLY.

Narrative: DURING REPACK OF NOSE LNDG GEAR STRUT SEALS, TOP HALF OF CTRING CAM WAS INSTALLED 90 DEGS. THIS KEPT STRUT FROM FULLY EXTENDING WHEN ACFT IS INFLT PREVENTING NOSE LNDG GEAR RETRACTION. MAINT MANUAL DOES NOT MENTION CHKING FOR PROPER ALIGNMENT NOR DOES IT CALL FOR A GEAR SWING UPON COMPLETION OF INNER CYLINDER INSTALLATION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE PROB WAS THE UPPER CTRING CAM ASSEMBLY HAS 4 KEYWAYS 90 DEGS APART AND THIS ASSEMBLY CAN BE INSTALLED ONLY 1 CORRECT WAY AND THIS SIT WAS NOT NOTED IN THE MAINT MANUAL. THE RPTR SAID THE MANUAL GAVE NO CORRECT MINIMUM STRUT EXTENSION WHICH WOULD HAVE CAUGHT THE ERROR BEFORE TAKING THE ACFT OFF THE NOSE JACKS. THE RPTR STATED THE COMPANY HAS ALLOWED ALL THE PEOPLE INVOLVED IN THE STRUT BUILD UP TO ADD TO UPGRADING ALL THE CLASS 1 DOCUMENTS COVERING THIS JOB.

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.