Document ID: chunk:federal_register_of_legislation:F2005B00932:body:0:p11
Version: federal_register_of_legislation:F2005B00932
Segment Type: other
Provision Reference: 
Character Range: 28376–31579

systems;
 (j) data busses and multiplexing systems associated with instrument systems;
 (k) flight data recorder systems;
         (l) ground proximity warning systems — excluding radio inputs;
         (m) stall warning/indicating systems;
         (n) electronically displayed check lists — excluding radar displays.
        Note 1: The instrument system wiring to the electrical power supply terminates at the distribution bus, circuit breaker or fuse.
        Note 2: The instrument system wiring supplying data signals to the radio system terminates at the connection to the radio system equipment or junction box.
6.2 Instrument Category Privileges: With respect to maintenance of aircraft, certification of maintenance within the instrument category may be made by persons holding the appropriate instrument rating(s) with the following limitations:
 (a) maintenance of components which are supplied as bench tested units, installed in aircraft — limited to inspection, replacement and adjustment of parts normally adjustable or replaceable in service where the subsequent operation may be proved without the use of test equipment additional to that normally used for functional tests on the aircraft;
 (b) maintenance of an instrument system which includes any of the following is excluded unless the licence holder is, or is employed by, the holder of a valid appropriate certificate of approval:
 (i) the disturbing of individual parts of units which are supplied as bench tested units, where subsequent functioning must be proved using test equipment additional to that used for normal functional test on the aircraft or troubleshooting;
 (ii) maintenance of operational and automatic test equipment (ATE) software;
 (iii) initial installation or subsequent modification of an instrument system.
6.3 Instrument Category — Electrical Category Privileges: Certification of maintenance within the electrical category may be made by persons holding the appropriate instrument rating(s) — limited to maintenance of interwiring, but excluding functional tests of electrical sys­tems required after maintenance.
6.4 Instrument Category — Airframe Category Privileges: Certification of maintenance within the airframe category, may be made by persons holding the appropriate instrument rating(s), as follows:
 (a) on all aircraft — limited to instrument components;
 (b) on aircraft not classified Group 20, where a Group 10 rating is held — limited to pressurisation control systems;
 (c) on aircraft classified Group 20 — limited to pressurisation control systems.
6.5 Instrument Category — Engine Category Privileges: Certification of maintenance within the engine category, may be made by persons holding the appropriate instrument rating(s) — limited to instrument components.
6.6 Instrument Category — Radio Category Privileges: Certification of maintenance, excluding operational checks, within the radio category may be made by persons holding the appropriate instrument rating(s) as follows:
         (a) on aircraft approved only for V.F.R. operations limited to:
 (i) security of attachment of wiring and components; and
 (ii) replacement of removeable items of equipment of radio systems;