Chapter 10.5.3
Special Instructions (Technical) – General Procedures and Responsibilities
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Table of contents Paragraph |
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2 Special Technical Instruction (STI) / Servicing Instruction (SI) system outline
3 Responsibilities for STI/SI production
3.1 4Design Organization (DO)3 responsibilities
3.2 4Project Team (PT)3 responsibilities
4 Urgent Technical Instruction/Routine Technical Instruction (UTI/RTI) system outline
5 Responsibilities of Stns/Ships/Units for SI(T) administration
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List of figures
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Figure 1. STI/SI Production Procedure Flowchart.
The Special Technical Instruction (STI), Servicing Instruction (SI), Urgent Technical Instruction (UTI) or Routine Technical Instruction (RTI) procedure is to be invoked if rapid action is essential to identify, monitor, repair or prevent the occurrence or re-occurrence of a potential fault in an aircraft or equipment. These procedures are not to be used to circumvent more formal action, ie a UTI in lieu of an STI/SI or an STI/SI in lieu of a modification or maintenance schedule amendment. The UTI/RTI may be used to disseminate information of a technical-administrative or policy nature as detailed at Chapter 10.5.5, but is not to be used to amend MOD-administered publications; procedures for which are at Chapter 8.2.
2 Special Technical Instruction (STI) / Servicing Instruction (SI) system outline
An STI/SI can be initiated on the recommendation of the 4Design Organization (DO)3or at the request of the 4Project Team (PT)3. The general outline of the procedure for producing an STI/SI is shown in the flowchart at Figure 1. An STI is only to be raised where remedial action is non-recurrent; an SI is raised for remedial action that is recurrent.
3 Responsibilities for STI/SI production
3.1 4Design Organization (DO)3 responsibilities
The 4DO3for the aircraft or equipment concerned is responsible for the following:
1 Preparing the draft STI/SI.
2 Alerting the 4PT3, if appropriate, and Non-Destructive Testing (NDT) staffs when there is a need for an NDT technique.
3 When contracted to do so, initiating modification, drawing amendment, AP amendment or other action to enable cancellation of the Instruction.
4 Where the 4DO3is the issuing authority, giving technical approval.
5 Ensuring that:
5.1 4PT3 approval has been gained prior to issue.
5.2 The relevant approval(s) details have been entered into field 10 of the STI/SI layout - (Chapter 10.5.4 figure 1).
6 Preparing Instructions for printing and distribution.
3.2 4Project Team (PT)3 responsibilities
The 4PT3 is responsible for the following:
1 Ensuring that Draft Instructions are suitable and achievable for the application for which they have been raised. This function may require specialist staff involvement and/or a proof application on an aircraft or equipment and discussion with Front Line Commands (FLCs) on content affecting availability, capability or sustainability.
Note:
Draft Instructions are to be raised with the word DRAFT as a ‘centred’ header and footer to the document or with the word DRAFT embellished as a watermark on the document. The issuing 4PT3 is to ensure that concise instructions are supplied with the draft SI(T) emphasizing that the draft SI(T) is not to be acted upon until receipt of the authorized SI(T).
2 Where the Issuing Authority is the 4PT3, discussing technical approval with the 4DO3.
3 Establishing a process to manage all STI/SIs that includes:
3.1 Maintaining a register of reference numbers to be allocated to Instructions, (if also the Issuing Authority).
3.2 Maintaining 4an index3 of STI/SI in the Topic 2(N/A/R)1.
3.3 Preparing Instructions for printing and distribution.
3.4 Ensuring that procedures are in place to cancel Instructions.
3.5 Conducting a periodic review of distribution lists, ensuring that all end users are included.
3.7 Providing the relevant Airworthiness Management Group Meeting with summaries and periodic indexes for each category of STI/SI that remain extant beyond the specified periods as detailed in Chapter 10.5.1 paragraph 4.4.
4 Ensuring that the layout and content of the Instruction conforms to the requirements of this chapter.
5 Ensuring that only a competent person with the appropriate Level of Authority (LOA) from the 4PTL3 approves the release of the Instruction as detailed in Chapter 1.1.
6 Where the 4PT3 is the Issuing Authority, ensuring that the relevant approval(s) details have been entered into field 10 of the STI/SI layout; see Chapter 10.5.4 figure 1.
7 Where a Platform 4PT3 is the Engineering Authority for an equipment with multi-platform applicability and has a requirement to issue an STI/SI against this equipment, (using an SI(T) category which is sponsored by a Commodity 4PT3), the issuing Platform 4PT3 is to request an SI(T) reference number from the appropriate Commodity 4PT3. The Platform 4PT3 will be responsible for producing and distributing the SI(T).
8 Initiating supersession of the Instruction by modification, drawing amendment, AP amendment or other appropriate action.
9 Ensuring that action is taken to initiate updating of single-Service information systems on generation and cessation of Instructions.
11 Ensuring that the requirements and implications of applying the Instruction to equipment fitted to flight simulators and synthetic trainers, not-in-use equipment and equipment in store are met.
12 Ensuring that, whenever an STI/SI is raised, its effect on the Safety Case is assessed and, where it does not cover the change, revises the Safety Case with a description of the change and supporting airworthiness evidence.
13 Where appropriate, advising the Release to Service Authority (RTSA) 43 of the effect of any Instruction on the Military Aircraft Release and implications for the Release to Service (RTS) or the Letter of Release for ship-borne operations.
14 4Providing Handling Squadron (HS) with a draft copy of the SI(T) and obtaining from HS a decision on whether it affects aircraft or equipment operation and handling and, when necessary, the wording for an MOD Form 703A1 or MOD Form 703A2 entry.3
16 Tasking the appropriate authority with developing any NDT techniques required.
17 Ensuring that the content of a Service Bulletin (SB) is appropriate for issue as an STI/SI and that the actions at sub-paragraphs 10 to 15 above have been completed where, in accordance with Chapter 10.5.1, 4Military Aviation Authority Technical Regulator Head (MAA Tech Reg Hd)3 has authorized the exceptional use of SBs.
18 Making provision for training/education for end users in the use of Instructions.
19 Ensuring that any issues regarding Health and Safety at Work (HASAW), Control Of Substances Hazardous to Health (COSHH), etc, have been dealt with appropriately.
20 For equipment 4PTs3 intending to raise an Instruction for equipment installed in aircraft, consulting the relevant aircraft 4PT(s)3and obtaining their agreement prior to the Instruction being issued.
4 Urgent Technical Instruction/Routine Technical Instruction (UTI/RTI) system outline
The 4PT3 is responsible for the following:
1 Ensuring that the UTI or RTI has been raised with the appropriate level of urgency as detailed in Chapter 10.5.5.
2 Ensuring that details of follow-up action are included, cancelling the UTI or RTI.
3 Determining whether any extension, and how much, may be applied locally to single-application or repetitive Instructions.
4 Ensuring that draft Instructions are suitable for the application for which they have been raised and that the Instructions are achievable. This function may require specialist staff involvement and/or a proof application on an aircraft or equipment and discussion with FLCs on content affecting availability, capability or sustainability.
5 Establishing a process to manage all UTIs and RTIs that includes:
5.1 Allocating a unique reference number for each UTI and RTI as detailed in Chapter 10.5.5. The platform/equipment category is to be part of the unique reference number; Chapter 10.5.2 lists the categories to be used.
5.2 Maintaining a separate register of reference numbers to be allocated to Instructions.
5.3 Maintaining 4an index3 of UTI/RTI in the Topic 2(N/A/R)1.
5.4 Conducting a periodic review of distribution lists.
5.6 Providing the relevant Airworthiness Management Group Meeting with summaries and periodic indexes for each category of UTI/RTI that remains extant beyond the specified periods as detailed in Chapter 10.5.1 paragraph 4.4.
6 Where a Platform 4PT3 is the Engineering Authority for equipment with multi-platform applicability and has a requirement to issue a UTI/RTI against this equipment, (using a SI(T) category which is sponsored by a Commodity 4PT3), the issuing Platform 4PT3 is to request an SI(T) reference number from the appropriate Commodity 4PT3. The Platform 4PT3 will be responsible for producing and distributing the SI(T).
7 Ensuring that the layout and content of the Instruction conforms to the requirements of this chapter and Chapter 10.5.5.
8 Ensuring that Reference/NATO Stock/Management code numbers quoted are accurate and verifying the availability of items required from stock.
9 Ensuring that the requirements and implications of applying the Instruction to equipment fitted to flight simulators and synthetic trainers, not-in-use equipment and equipment in store are met.
10 When appropriate, advising the RTSA and the AOA of the effect on the RTS and implications for the RTS or the Letter of Release for ship-borne operations.
11 4Obtaining from HS3 the wording of the statement to be included in the Instruction where the operation or handling of an aircraft is affected by that Instruction. This statement will form the MOD Form 703A series entry or MOD Form 703B series entry required for a given Instruction. In consultation with the appropriate authority, 4PTs3 are to arrange for the issue of any supporting SFI that is generated by the UTI/RTI.
12 Tasking the appropriate authority to develop any required NDT techniques.
13 Considering any follow-up Instructions that may be required
14 Arranging for the distribution of Instructions to all end users and, where an SI(T) is issued by signal, ensuring that copies have been received by all action addressees in accordance with Chapter 10.5.1.
15 Initiating supercession of the Instruction by modification, drawing amendment, AP amendment or other appropriate action.
16 Ensuring that, where appropriate, a follow-up Instruction is generated on cancellation of the UTI or RTI.
17 Ensuring that any issues regarding HASAW, COSHH, etc, have been dealt with appropriately.
18 For equipment 4PTs3 intending to raise an Instruction for equipment installed in aircraft, consulting the relevant aircraft 4PT(s)3 and obtaining their agreement prior to the Instruction being issued.
5 Responsibilities of Stns/Ships/Units for SI(T) administration
Stns/Ships/Units, as required, are to maintain registers of extant SI(T) and retain copies of 4PT generated 6-monthly summaries (see Paragraph 3.2 item 3.6 and Paragraph 4 Item 5.5)3.
This chapter refers to the following publication:
1 Topic 2(N/A/R)1 – General Orders and Special Instructions.
Figure 1. STI/SI Production Procedure Flowchart.
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