Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
AUDI AG uses the ultrasound method for diagnosis of CFRP
components.
The test unit transmits very short ultrasonic pulses (1...10µs). The
sound passes through the component being tested and reflects
off the back panel; the echo is reflected back to the test unit. The
data are compared with those of a fault-free component.
A - Material thickness
B - Fault in component
C - Fault depth
5.5.6 Special features of plastics in general
Plastics are used in a very wide range of areas. For information
on their properties and repair notes, refer to the repair notes for
the relevant vehicle or to the chapter “Plastic
repairs” ( ⇒ page 58 ).
5.6 Passive safety
5.6.1 Restraint systems (seat belt systems)
WARNING
After an accident, the seat belt system must always be checked
systematically. If any damage is determined the customer must
be informed that the belt has to be renewed.
Points to check:
– Check belt ⇒ General body repairs, interior; Rep. gr. 00 ;
Safety precautions; Checking belt .
– Check automatic belt retractor (locking action) ⇒ General
body repairs, interior; Rep. gr. 00 ; Safety precautions; Check‐
ing automatic belt retractor (locking action) .
– Perform visual inspection of belt buckle ⇒ General body re‐
pairs, interior; Rep. gr. 00 ; Safety precautions; Visual inspec‐
tion of belt buckle .
– Perform functional check of belt buckle ⇒ General body re‐
pairs, interior; Rep. gr. 00 ; Safety precautions; Functional
check of belt buckle .
– Check guide fittings and latch plate ⇒ General body repairs,
interior; Rep. gr. 00 ; Safety precautions; Checking guide fit‐
tings and latch plate .
– Check securing components and anchorage points ⇒ General
body repairs, interior; Rep. gr. 00 ; Safety precautions; Check‐
ing securing components and anchorage points following an
accident .
General InformationBody Repairs, General Body Repairs - Edition 04.2018
5. Assessing damage 19
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