Four mechanics report about insufficient pre-drilled pilot holes in a new lower splice plate of a B7...

Attributes
ACN	918756
Time
Date	201011
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Winglet
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Person 2
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

I was told the fasteners were not found to be installed. When doing turnover with midnight crew on a B767; aircraft X; the layout number of fasteners did not match the pre-drilled pilots [holes] in the outboard splice plate; number was less than print 767-xxxx diagram. Twelve fasteners (2 groups of 6) were found missing. We found the installation kit. Rib 32 lower doubler did not have pilot holes drilled at L-7 and L-9 locations. A write-up was initiated for engineering clarification. As we tried to layout fasteners; it became apparent the pattern did not fit the engineering print callout [diagram]. At which point we asked who laid out the fasteners on [another B767] aircraft Y? No one was able to remember. A request was made to check aircraft Y in the field.

Original NASA ASRS Text

Title: Four mechanics report about insufficient pre-drilled pilot holes in a new lower splice plate of a B767 winglet modification kit. Their Engineering task card included an additional twelve fastener locations on the splice plate for installation of the winglet modification.

Narrative: I was told the fasteners were not found to be installed. When doing turnover with midnight crew on a B767; Aircraft X; the layout number of fasteners did not match the pre-drilled pilots [holes] in the outboard splice plate; number was less than print 767-xxxx diagram. Twelve fasteners (2 groups of 6) were found missing. We found the Installation Kit. Rib 32 lower doubler did not have pilot holes drilled at L-7 and L-9 locations. A write-up was initiated for Engineering clarification. As we tried to layout fasteners; it became apparent the pattern did not fit the Engineering print callout [diagram]. At which point we asked who laid out the fasteners on [another B767] Aircraft Y? No one was able to remember. A request was made to check Aircraft Y in the field.

Data retrieved from NASA's ASRS site as of April 2012 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.

Four mechanics report about insufficient pre-drilled pilot holes in a new lower splice plate of a B767 winglet modification kit. Their engineering task card included an additional twelve fastener locations on the splice plate for installation of the winglet modification.