A de-havilland dash 8-200 aircraft was found to have the #1 engine inboard and outboard side mounts installed incorrectly. Engine written-up for propeller vibration.

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Attributes
ACN	731310
Time
Date	200703
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Dash 8-200
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance technician : 7
ASRS Report	731310
Events
Anomaly	maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : work cards performance deficiency : installation performance deficiency : inspection performance deficiency : scheduled maintenance performance deficiency : training
Supplementary
Problem Areas	Chart Or Publication Maintenance Human Performance
Primary Problem	Chart Or Publication
Situations
Publication	Task Card - M/M

Narrative:

In mar 2007 aircraft's #1 engine required replacement. During the installation of the #1 engine; in accordance with maintenance job card item; the front side mounts were inadvertently installed incorrectly; with the beveled sandwich pad and the plain sandwich pad reversed. Upon engine completion; aircraft was released for revenue service. 8 days later aircraft was written up for propeller vibration. Upon investigation the top forward mount was found to be defective. At that time the forward side mounts were found to be installed incorrectly. Maintenance job card item step (2)(a) should state that the beveled pad be installed on the aft side of the brackets and that the plain pad be installed on the forward side of the brackets. At the time of engine replacement numerous new employees unfamiliar with the procedure were assisting. Also; the maintenance job card instructions for installation of forward side mounts interpretation can be deceiving.

Original NASA ASRS Text

Title: A DE-HAVILLAND DASH 8-200 ACFT WAS FOUND TO HAVE THE #1 ENG INBOARD AND OUTBOARD SIDE MOUNTS INSTALLED INCORRECTLY. ENG WRITTEN-UP FOR PROP VIBRATION.

Narrative: IN MAR 2007 ACFT'S #1 ENG REQUIRED REPLACEMENT. DURING THE INSTALLATION OF THE #1 ENG; IN ACCORDANCE WITH MAINT JOB CARD ITEM; THE FRONT SIDE MOUNTS WERE INADVERTENTLY INSTALLED INCORRECTLY; WITH THE BEVELED SANDWICH PAD AND THE PLAIN SANDWICH PAD REVERSED. UPON ENG COMPLETION; ACFT WAS RELEASED FOR REVENUE SVC. 8 DAYS LATER ACFT WAS WRITTEN UP FOR PROP VIBRATION. UPON INVESTIGATION THE TOP FORWARD MOUNT WAS FOUND TO BE DEFECTIVE. AT THAT TIME THE FORWARD SIDE MOUNTS WERE FOUND TO BE INSTALLED INCORRECTLY. MAINT JOB CARD ITEM STEP (2)(A) SHOULD STATE THAT THE BEVELED PAD BE INSTALLED ON THE AFT SIDE OF THE BRACKETS AND THAT THE PLAIN PAD BE INSTALLED ON THE FORWARD SIDE OF THE BRACKETS. AT THE TIME OF ENG REPLACEMENT NUMEROUS NEW EMPLOYEES UNFAMILIAR WITH THE PROC WERE ASSISTING. ALSO; THE MAINT JOB CARD INSTRUCTIONS FOR INSTALLATION OF FORWARD SIDE MOUNTS INTERP CAN BE DECEIVING.

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.