Hello to all...
I am trying to find out if there are any maintenance planners/technicians/engineers that are accomplishing the above referenced Service Bulletin.
This relates to the leading edge slats of the 767. Originally, SB 57A0039 addressed corrosion and disbond issues, and was specified by AD 93-14-19. 57A0039 called out for an inspection and that was it. There were other issues and more slats were found corroded; here comes 57A0057(supercedes 57A0039) which had two ways to comply and terminate the AD:one, replace the trailing edge wedge with a "production" or a new "PAA(Phosphoric Acid Anodize)" wedge; two, accomplish an ultrasonic and X-ray inspection, rework the edges of the core and that was the AMOC.
The PAA wedges were expensive and not available. The production wedges were, expensive, some were available. Not to mention you needed to rent the tool to properly locate the trailing edge, the fastener kit and other miscellaneous materials needed to complete the task. So once the trailing edge was replaced, the AD was terminated. If the operator installed the "Production" wedge, they were in for a surprise...
SB 57A0101 was recently released and it is more black and white. Basically, you need to install a new "PAA" wedge, or keep inspecting the slat trailing edge. If you purchased a "Production" wedge, you must now purchase the new "PAA" wedge, fastener kit etc... The installation of the PAA wedge will terminate the requirements of 57A0101. If not, you need to tap test or Ultrasonically inspect the trailing edges at various intervals depending on the group/configuration. To install a new PAA Wedge costs about 27,000.00 for the wedge, 4,600 for a fastener kit, 350.00 for the tool and about 6,000.00 in labor. So figure about 39,000 (paint, sealants, misc parts) multiplied by 10 (outboard slats) gives you 390,000.00; add 100,000.00 (inboard slats @ 50K each) and you have 490,000.00 to terminate the Service Bulletin.
Inspecting the slat consists of an ultrasonic inspection that a crew of two, working two shifts (32 hours) can probably accomplish in a day. Do this and you don't have to re-inspect for another thirty-six months.
After that long winded explanation, my questions is this: How many operators are terminating this SB?
How can a maintenance organization justify that cost?
If there is anyone familiar with this, I would like to read your comments.