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S4C5 - MODIFICATIONS
Table of Contents
1. Throughout the in service life of ADF aircraft and aeronautical product, modifications (MODs) to the approved configuration will be necessary to meet operational and logistic demands. The engineering, technical integrity and technical airworthiness aspects of the proposed modifications are managed by the relevant Systems Program Office (SPO). The SPO is the authority for incorporation of these engineering changes into an aircraft and these changes may be issued in the form of a Modification Order.
2. This chapter prescribes the requirements for Approved Maintenance Organisations (AMO) to effectively manage modifications.
MODIFICATION ORDER TYPES
3. There are five types of Modification Order. Each variation satisfies a slightly different ADF business requirement. The types of orders are:
4. Modification Orders are the means by which approved configuration changes resulting from the SPO Engineering Change Proposal (ECP) process are incorporated into the asset. The actual development and incorporation of Modification Orders are engineering and maintenance functions respectively. Controlling the status of development and incorporation of a Modification Order is an important element of configuration management (CM).
Draft Modification Order
5. A draft modification order represents a working draft of the Modification Order and forms part of the ECP where physical incorporation is required.
Multi-Part Modification Order
6. The purpose of the multi-part Modification Order is to satisfy the need for engineering changes to be released in stages to allow smooth incorporation.
7. The multi-part Modification Order is to clearly title each part, eg Part A, Part B, and detail the sequence and timings of incorporation of each part. Incorporation of each part is to be recorded separately with the same Modification Order number but suffixed with the letter corresponding to each part.
Special Order Only Modification Order
8. The purpose of the SOO Modification Order is to enable an operational capability to be incorporated into an asset, without specifying in which individual asset the change is to be incorporated.
Non-Standard Modification Order
9. A NSM applies only to the modification of ADF aircraft by AMOs such as Air Warfare Centre (AWC) and Aircraft Maintenance and Flight Trials Unit (AMAFTU) that are authorised to conduct developmental or investigative design testing.
10. The NSM controls temporary changes to the approved configuration for the purposes of engineering testing activity, but does not permanently change the current approved configuration documentation.
11. Embodiment/Removal. Embodiment/Removal of NSMs are only to be performed by AWC/AMAFTU personnel or personnel authorised by the CO.
12. Modification Orders must be incorporated in accordance with the instructions within the Modification Order. When the target date can not be met, AMOs must apply to the responsible SPO for an extension or assistance, stating circumstances giving rise to the request and any assistance required to gain compliance. Such requests are to be made in advance to enable arrangements to be made before expiry of the stipulated incorporation period.
Deferment of Modification Incorporation
13. Where an extension is approved by the relevant SPO, the extension must be carried forward as deferred maintenance in accordance with the requirements of Section 3 Chapter 11—Deferment of Required Maintenance and an entry annotated in the recording and certification system to reflect the extension.
14. Removal of MODs from aircraft or aeronautical product is not permitted without prior approval of the relevant SPO.
15. The AMO must report to the responsible SPO on the incorporation status of the Modification Order. The reporting of the incorporation status closes a loop on the original engineering change and forms part of configuration management process. The incorporation status of Modifications must be reported to the SPO on a periodic basis using the codes below.
FLIGHT SIMULATORS, TRAINING DEVICES AND UNMANNED AIRCRAFT
16. Procedures for the control of MODs to flight simulators, training devices and unmanned aircraft must be the same as those applied to manned aircraft.
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