I, WILLIAM BRUCE BYRON, Director of Aviation Safety, on behalf of CASA, make this instrument under regulation 33B of the Civil Aviation Regulations 1988.

[Signed Bruce Byron]

Bruce Byron
Director of Aviation Safety and
    Chief Executive Officer

11 December 2007

Civil Aviation Order 100.28 Instrument 2007

1 Name of instrument

 This instrument is the Civil Aviation Order 100.28 Instrument 2007.

2 Commencement

 This instrument commences on the day after it is registered.

3 New Civil Aviation Order 100.28

 Civil Aviation Order 100.28 is repealed and a new Civil Aviation Order 100.28 substituted as set out in Schedule 1.

Schedule 1 Civil Aviation Order 100.28

Aircraft weight control authority

This Civil Aviation Order is to be read in conjunction with Civil Aviation Order 100.23.

1 Requirements for issue

 1.1An applicant for an authority issued under this Civil Aviation Order must submit satisfactory evidence that:

(a) he or she has been adequately trained for the purpose; and

(b) he or she has had adequate recent practical experience of the duties to be performed in relation to the authority; and

(c) he or she has passed such examinations in relation to the authority as are required or approved for the purpose.

 1.2An applicant for the issue of an authority who holds recognised engineering qualifications, such as admitting to Graduate Membership of the Institution of Engineers (Australia) and who meets the requirements of subparagraphs 1.1 (a) and (b) of this Order may be granted an exemption from the requirement to pass the prescribed examination.

2 Application for authority

 2.1Application for the issue or extension of an aircraft weight control authority must be made to a field office of the Civil Aviation Safety Authority (CASA) on Form 377.

3 Examination

 3.1An applicant, unless granted an exemption in accordance with the provisions of paragraph 1.2 of this Order, will be examined in accordance with the syllabus specified in Appendix I of this Order.

 3.2A candidate must achieve a minimum mark of 75% to pass the examination, except that where a candidate fails to satisfactorily answer particular questions specified in the question paper, the candidate will be failed irrespective of the total marks achieved.

Note   Examination results will be notified direct to the candidate by the appropriate field office of CASA.

4 Re-examination

 4.1An applicant who fails an examination may be permitted to attempt the written examination again.  The Director reserves the right to determine a minimum period prior to the applicant’s further examination and, where considered necessary, require evidence that the applicant has received additional training of a nature acceptable to the Director.

5 Issue of authority

 5.1An aircraft weight control authority will be issued to an applicant who has complied with the requirements of this Order.

 5.2The Director may issue an authority endorsed with such limitations as he considers necessary.

6 Period of validity

 6.1An aircraft weight control authority is valid for a period of 2 years.

7 Renewal of authority

 7.1Application for the renewal of an aircraft weight control authority must be made on Form 359, and an authority issued without further examination, provided the holder produces acceptable evidence that he or she has maintained proficiency and familiarity with the methods of aircraft weight control applicable to the authority held.

Appendix I

Syllabus for aircraft weight control authority

1 General

 1.1Documents — Relevant Civil Aviation Orders; Aircraft Weighing Summary; Flight Manuals; Load Data Sheets; Loading Systems; Certificates of Airworthiness; Aircraft Manufacturer’s data relative to weight control and preparation of aircraft for weighing; Record of Alterations.

 1.2Weight Control Officer — responsibilities and privileges — preparation and approval of loading data — procedure for amendment of flight manual loading information.

 1.3Terms — datum; empty weight, operating weight, maximum take-off weight, ramp weight, maximum landing weight, zero fuel weight; specific gravity; loading system; fixed equipment, removable equipment; centre of gravity, centre of gravity limits; mean aerodynamic chord; unusable fuel and oil.

 1.4Principles and purpose of weight control; periodic reweighing of aircraft.

 1.5 The Principle of Moments — arm; moment; moment index; constant.

 1.6Conversion Factors — Imperial to SI units, for length and mass; Imperial and USA to SI units, for liquid volume.

2 Equipment and control

 2.1Plumb-bobs and levels — uses and serviceability checks.

 2.2Scales — types; accuracy, repeatability and calibration requirements; precautions during transport and operation.

 2.3Preparation of aircraft — jacking and slinging, fuel tank draining procedure and fire precautions; equipment lists.

 2.4Consecutive and independent weighing requirements; permissible discrepancies between weighings, factors that affect accuracy of weighing.

3 Weight and balance calculations

 3.1Basic principles of calculations involving plus and minus quantities.

 3.2Empty weight — method of determination; typical deductions and additions; standard weights for engine fuel, oil, passengers and crew.

 3.3Moment index — calculations for weights fore and aft of datum.

 3.4Empty weight c.g. — method of determination; conversion of c.g. position expressed in distance from datum, to a percentage of M.A.C. and vice versa.

 3.5Compilation of Aircraft Weighing Summary and Load Data Sheet.

4 Weight and balance extreme conditions

 4.1Determination of weight and balance extreme conditions.

 4.2Loading System — cockpit and compartment placards; loading graphs and tables for disposable load; allowable weight — moment, or weight-centre of gravity graphs and tables; floor plans.

 4.3Uses of fixed and disposable ballast.

5 Weight control in service

 5.1Record of Alterations form — purpose; compilation.

 5.2Reweighing requirements.