On Friday, December 6, 2019 at 3:15:05 AM UTC-8, Terry Slater wrote:
At 22:33 05 December 2019, 2G wrote:
On Thursday, December 5, 2019 at 11:15:08 AM UTC-8, Dave Walsh wrote:
At 16:14 05 December 2019, 2KA wrote:
Yeah, the entire fleet was inspected and repaired as required=20
(years ago),
and SH paid for the whole thing. Gliders built at the factory=20
in Germany
were found to be affected, as well as those built at=20
contractors.

Lynn Alley
"2KA"
=20
You were lucky! I was in a UK owned DuoDiscus based at=20
Sisteron, France, a few years ago. Wing spar de-bonding was=20
discovered at an annual inspection even though the glider had,=20
in theory, been inspected previously, looking for this specific=20
manufacturing fault. SH DECLINED TO PAY FOR THIS REPAIR;=20
if I recall correctly each of us in the 8 man syndicate had to=20
cough up about =C2=A3700.......
Dave Walsh

This is particularly disturbing, raising the question of the
effectiveness
=
of the original inspection method(s). Do the logbook(s) detail how and
when=
this inspection was done? How did the current annual discover the
de-bondi=
ng?

Tom

The inspections were performed with an endoscope, and the full length of
the spar bonding was inspected visually. SH issued a very comprehensive
guide to the process.

Terry

Yeah, I read their TN 396-08 that covered the process. This required cutting several holes in each wing for access by the endoscope. Of course, these holes had to be repaired and refinished. It would have been so much easier and cheaper to have done this inspection by ultrasonic NDT.

Tom