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which in the beginning was limited in number (approx. 25), to carry out special - highly critical
– double inspection (formerly inspection tasks), e.g. following work on the control system. Those
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staff members have to undergo special further training and must have gained practical experience.
The LBA required the passing of an examination before the examination board for inspectors of
aeronautical products.
The designation of the check rating B1 and B2 is a merely internal designation and does not correspond
to the designations of Certifying Staff under JAR-66.
According to information obtained from the LBA, the number of the staff members holding a double
inspection rating (B2) had increased during the years to 140 staff members at the time of the incident.
1.17.3 Supervision of the maintenance organisation by the Luftfahrt-Bundesamt
The maintenance organisation is subject to approval and supervision by the LBA. The responsibility
for the supervision of all four facilities of the organisation and approx. 92 stations lies with one
technical inspector of the LBA, who has to supervise besides the company concerned also two
other German and three foreign organisations.
The Division U3 of the LBA, Maintenance, has got 12 technical inspectors for the approval and the
supervision of 145 aircraft operators, 29 maintenance organisations (9 of which are abroad) and
65 flight training organisations.
Generally one annual audit of 2 to 3 days per facility is scheduled. Supervision in the strict sense of
the word takes place only on the level of the regulations and rules as described in the quality management
manual.
The quality management manual part 1 and part 2 is a part of the LBA approved quality system of
the maintenance organisation concerned. Part 1 mainly defines the administrative items whereas
part 2 describes the rules of quality management. The procedural instructions, which are based
mainly on the quality management handbook part 2, are subject to checks on a random basis only.
Out of the total of approx. 360 effective procedural instructions in the organisation 254 apply to
aeroplane maintenance, of which 173 apply to the area concerned in this case.
1.18 Additional information
1.18.1Documentation
In the following the documents which were available to eliminate the complaint are indicated.
The “AIRCRAFT MAINTENANCE MANUAL“ (AMM) issued by the manufacturer Airbus Industrie as
well as the Electronic Standard Practices Manual (ESPM) served as a working basis for the repair
of the aeroplane according to the ATA (AIR TRANSPORT ASSOCIATION) Specification no. 100,
29th revision.
In addition the following internal documentation was applied.

The Standard Practices Manual of the maintenance organisation (SPM) contains the procedures
for the maintenance of the aircraft of particular customers. Some of the procedures
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contained in the SPM are supplements to the existing manuals of the aircraft manufacturers and
the maintenance organisation. Others are aircraft manufacturers’ procedures modified by the
engineering departments of the maintenance organisation.

Quality Management Handbook for “qualification requirements and ratings of personnel
assuming production tasks“. This handbook describes the system and the responsibilities for
the qualification, ratings and the granting of ratings for personnel charged with production tasks
in the maintenance of aircraft and aircraft components and in the manufacturing of aircraft components.
The responsible accomplishment, inspection and certification of maintenance work on
aircraft or aircraft components, of manufacturing of aircraft components as well as their release
to service may be effected only by production personnel trained and qualified in accordance
with the qualification system described in the QM handbook.

Quality management handbook - system and responsibilities for double inspections. This
QM guideline describes the system and the responsibilities for the provision of double inspection
in the scope of quality inspections in the maintenance of aircraft, aircraft components and in
the manufacturing of aircraft components. Generally it will be sufficient if the staff member who
has carried out the work conducts a self-check of his work for compliance with the requirements
in the scope of his responsibility. For special tasks an additional double inspection is necessary,
which is to be accomplished by a second staff member holding at least the same qualification.
In the corresponding internal procedure are the requirements for double inspection to be described
　
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