13Electrical hoist assembly — earth bonding testing

13 Electrical hoist assembly — earth bonding testing

13.1 This clause applies for an aircraft with an electrical hoist assembly that does not have specific bonding testing requirements.

13.2 The electrical bonding between each adjacent component part of the electrical hoist assembly must be tested:

(a) to a maximum resistance of 0.010 OHM; and

(b) using a bonding tester capable of resolving to 0.002 OHM.

13.3 For subclause 13.2, component parts of the electrical hoist assembly that must be considered adjacent to other parts include the control box, the electrical motor casing, the hoist body, the hoist arm and the attachment bracket.

13.4 Testing of the electrical hoist assembly must be carried out:

(a) before it is installed in the aircraft; and

(b) after it is installed in the aircraft — at intervals not exceeding every 24 months.

14 Periodic checking and testing of ATC transponders

Definition

14.1 In this clause:

electron tube technology or ETT means technology that uses the physical and electrical characteristics of a physical body to oscillate and amplify a signal at its resonant frequency for subsequent broadcast, including through thermionic valves, klystrons or cavity oscillators.

Note 1 As the components age, the characteristics which provide the signal stability vary which affects the output signal.

Note 2 Transponders using ETT include, for example, Honeywell (Bendix-King) KT76A, Narco AT150 and ARC RT859.

14.2 This clause applies to all air traffic control (ATC) transponders.

14.3 Before an ATC transponder is used for the first time in an aircraft, it must be system tested in accordance with the requirements of Appendix F of FAR 43, using Mode A code 2100.

14.4 After the test mentioned in subclause 14.3, and within the intervals mentioned in subclause 14.7, each ATC transponder must be system tested in accordance with the requirements of Appendix F of FAR 43, using Mode A code 2100.

Note Consideration should be given to aligning this test with that required under clauses 3, 4 and 5 of this Appendix 1.

14.5 After the test mentioned in subclause 14.3, without affecting the requirements under subclause 14.4, and within the intervals mentioned in subclause 14.8, each ATC transponder using ETT must also be tested in accordance with the requirements of Appendix F of FAR 43, using Mode A code 2100, to confirm that:

(a) the duration of all reply pulses (the pulse width) is at least 0.35, and not more than 0.55, microseconds; and