Mechanic is informed that a B737-400 elevator tab control mechanism link attach bolt was found installed oriented in the opposite direction of boeing drawing. Actual installation was approximately 21 months earlier.

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Attributes
ACN	783400
Time
Date	200708
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	783400
Events
Anomaly	maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : manuals performance deficiency : installation performance deficiency : inspection
Supplementary
Problem Areas	Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

I was made aware of a tab link attach bolt that was found installed oriented in the opposite direction of drawing. I have no recollection of the aircraft confign on aug/xa/07 when I accomplished task card. I am aware of the importance of following the instructions of the task card and would complete the instructions to the best of my ability.

Original NASA ASRS Text

Title: MECHANIC IS INFORMED THAT A B737-400 ELEVATOR TAB CONTROL MECHANISM LINK ATTACH BOLT WAS FOUND INSTALLED ORIENTED IN THE OPPOSITE DIRECTION OF BOEING DRAWING. ACTUAL INSTALLATION WAS APPROX 21 MONTHS EARLIER.

Narrative: I WAS MADE AWARE OF A TAB LINK ATTACH BOLT THAT WAS FOUND INSTALLED ORIENTED IN THE OPPOSITE DIRECTION OF DRAWING. I HAVE NO RECOLLECTION OF THE ACFT CONFIGN ON AUG/XA/07 WHEN I ACCOMPLISHED TASK CARD. I AM AWARE OF THE IMPORTANCE OF FOLLOWING THE INSTRUCTIONS OF THE TASK CARD AND WOULD COMPLETE THE INSTRUCTIONS TO THE BEST OF MY ABILITY.

Data retrieved from NASA's ASRS site as of January 2009 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.