special instructions technical

Question 1

What is a special instruction (technical) SI(T)?

Answer 1

A temporary instructions issued by or on behalf of TAA or the PT to undertake work to identify, monitor, repair or prevent the occurrence or re-occurrence of a potential fault in an aircraft or item of equipment.

Question 2

What forms do technical instructions take?

Answer 2

STI - Special Technical Instruction UTI - Urgent Technical Instruction SI - Servicing Instruction
RTI - Routine Technical Instruction

Question 3

Describe a SI

Answer 3

• Initiated on recommendation of DO Design Organisation or request of TAA or the PT
• Gives instructions for re-current remedial action – to repair of prevent a potential fault, usually a temporary measure.
• Normally superseded by an amendment to the technical publication

Question 4

Describe a RTI

Answer 4

• DO input not required
• Issued by PT
• May be issued in response to a Serious Fault Signal
• Can be either recurrent or non-recurrent
• Remedial action IS NOT necessary within 14 days / 25 flying hours

Question 5

Describe a UTI

Answer 5

• DO input not immediately required
• Issued by PT
• May be issued in response to a Serious Fault Signal
• Can be either recurrent or non-recurrent
• Remedial action IS necessary within 14 days / 25 flying hours

Question 6

How do we receive Special Instructions (technical)?

Answer 6

• The PT distributes them to all affected organisations i.e. Front line commands, stations, ships, Units and external agencies.
• Transmitted by signal for AC or equipment embarked on RN Ships.

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Question 7

For how long is a SI(T) extant?

Answer 7

• STI/SI = 24 months from date of issue
• UTI = 6 months from date of issue
• RTI = 12 months from date of issue

Question 8

How is a SI(T) cancelled?

Answer 8

UTI/RTI – cancelled on expiry of any pre-determined timescale or on supersession by a new TI
STI/SI – cancelled once the requirement has been satisfied or the instruction superseded