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RPS 20.17 Critical Planning Preparation & Delivery of Critical Parts. Goodrich Aerostructures Group. Outline. Definition of Critical Parts How do you distinguish a critical part from other parts? How are Critical Parts handled differently from other parts? Controlled manufacturing plans

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RPS 20.17 Critical Planning Preparation & Delivery of Critical Parts

GoodrichAerostructures Group


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Outline Critical Parts

  • Definition of Critical Parts

  • How do you distinguish a critical part from other parts?

  • How are Critical Parts handled differently from other parts?

  • Controlled manufacturing plans

  • Recent revision to RPS 20.17

  • Where and How to submit changes

  • Other key changes made in Rev. N


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Definition of Critical Parts Critical Parts

  • “A critical part is a component (either a part or an assembly) that because of design or manufacturing process considerations, must be controlled to assure that it is produced to strict engineering requirements on a highly uniform and consistent basis”.

  • At a minimum, engine mounts designed by Goodrich/Rohr are critical parts.


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Definition of Critical Parts Critical Parts

  • Critical parts are key structural elements whose integrity is crucial to the safety of the aircraft

  • For this reason, critical hardware undergoes extensive testing to insure its reliability

  • Any change to the design or manufacturing processes are carefully evaluated


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How do you distinguish a critical part from other parts? Critical Parts

  • A critical part is any part designated as such per RPS 20.17, RPS 20.17-2 Critical Assembly, or RPS 20.17-4 Critical Extrusion.

  • The following note (or one very similar) will be specified on the drawing and specified for each affected part number “CRITICAL PART PER RPS 20.17”.


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How are Critical Parts handled? Critical Parts

  • A Critical Part requires special control of planning.

  • The specific requirements of this planning are specified in RPS 20.17.

  • This planning is referred to as “frozen” or controlled planning.


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Controlled Manufacturing Plans Critical Parts

  • RPS 20.17 requires that manufacturing plans for critical parts be submitted to GR/AG Quality and M&P Engineering for approval.

  • This plan is then considered “frozen” and all changes must be processed per the requirements of RPS 20.17 prior to being incorporated.


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Controlled Manufacturing Plans Critical Parts

  • Parts manufactured or processed to a plan other than the approved plan on file at GR/AG are done so at the supplier’s risk!

  • Hardware manufactured at risk can not be delivered to GR/AG until the plan has been approved by GR/AG and the supplier has received written confirmation of that approval.


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Controlled Manufacturing Plans Critical Parts

  • Recent revisions to RPS 20.17 have significantly affected the approval process required for critical parts.

  • Each part number shall have Serial Number Traceability per Para. 3.3.1.8 Sub-Para. a thru e.


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What is a “Critical Operation”? Critical Parts

  • Critical Operation (CR) - any operation that, if removed, revised, or changed in sequence, may affect the quality or integrity of the final product.


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What are some examples of Critical Operations? Critical Parts

  • Forging operations

  • Heat treatment

  • Starting stock material specification

  • Non-destructive testing of finished part

  • Traceability requirements

  • Ref. par. 5.3.1 in Revision N for a complete

    list of critical operations


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How are Critical Operations identified on the planning? Critical Parts

  • When a plan is submitted, the letters (CR) should precede each operation that is a “critical operation”.

  • If no operations are identified with a (CR), all operations will be considered “critical” and all changes will require GR/AG approval prior to implementation.


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Changes to Critical Operations Critical Parts

  • Any change to the content or sequencing of Critical Operations shall require approval from GR/AG M&P Engineering and Materiel Quality Engineer (MQE) or Program Quality Engineer (PQE) prior to their implementation.


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Changes to Critical Operations Critical Parts

  • When production planning is submitted to GR/AG for approval, a “Critical Planning Revision Sheet” will accompany the plan. All relevant blocks should be completed. An incomplete form will be returned to the supplier and result in a delay of the planning approval.


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What if “Critical Operations” are not changed? Critical Parts

  • Changes to planning that do not affect “Critical Operations” must be submitted to GR/AG M&P Engr and GR/AG MQE or PQE within 10 working days.

  • As before, any change to the plan will require a change to the approved planning date and (where applicable), a change to the planning revision letter.


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What if “Critical Operations” are not changed? Critical Parts

  • Changes to operations that are not “Critical Operations” do NOT require GR/AG approval. Hence, these changes can be made and immediately implemented by the supplier. As stated before, a copy of this revised plan must be submitted to GR/AG within 10 days.


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Control of Planning Revisions Critical Parts

  • During the annual RPS 20.17 audit, the ‘working’ shop travelers (job instructions) will be audited for conformance to the approved planning on file at GR/AG. The planning dates/ revision letters must match as well as the content and sequencing of all “critical operations”.


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Control of Planning Revisions Critical Parts

  • Failure of the supplier to comply with these requirements will result in the supplier being put on probation and/or may lead GR/AG to require that ALL planning changes have prior GR/AG approval.


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Where and How changes are to be submitted Critical Parts

  • If at all possible, changes are to be

    e-mailed to M&P Engineer and a MQE / PQE

  • Patricia Adams, M&PE, e-mail address

    patricia.adams@goodrich.com

    - Dave Hollings, MQE, e-mail address, dave.hollings@goodrich.com

  • Ed Bernad, PQE, CFM56 & PW4000 Engine Mount Program, e-mail address

    ed.bernad@goodrich.com


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Where and How changes are to be submitted Critical Parts

  • If e-mail is not possible, all plans should be faxed to Patricia Adams at (619) 691-3781 (this is both her phone and fax number)

  • Do NOT fax a copy to the buyer / subcontract administrator UNLESS you have first sent a copy to the cognizant engineers


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Other Key Changes Critical Parts

  • Engineering takes precedence over the approved plan.

  • 1- 1.3.4 “Where a conflict exists between the engineering requirements and the approved planning, the engineering requirements shall take precedence.”


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Other Key Changes Critical Parts

  • Failure to strictly comply to the requirements of Rev. N could lead to probation and the loss of privileges

  • 1- 1.3.3 “At the discretion of RM&PE or RQA, Rohr may require that all revisions to the planning (whether critical operations or non-critical operations) may be submitted to RM&PE and RQA for approval prior to the delivery of the affected hardware.”


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Other Key Changes Critical Parts

  • Raw material must be traceable to the point of manufacture and ALL raw material sources (mills) are controlled by the GR/AG QSD

  • 3- 3.1.15.1 “Raw material shall be traceable to approved raw material manufacturers specified in the Qualified Suppliers Document.”


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RPS 20.17 Training Record Critical Parts

  • Date of Training ________________

  • Attendee’s of Training

    ____________ ____________

    ____________ ____________

    ____________ ____________

  • Instructor: David Hollings