RPS 20.17 Critical Planning
Preparation & Delivery of
Critical Parts
Goodrich
Aerostructures Group
1
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
• Recent revision to RPS 20.17
• Where and How to submit changes
• Other key changes made in Rev. N
2
Definition of 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.
3
Definition of 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
4
How do you distinguish a critical
part from other 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”.
5
How are Critical Parts handled?
• 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.
6
Controlled Manufacturing Plans
• 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.
7
Controlled Manufacturing Plans
• 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.
8
Controlled Manufacturing Plans
• 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.
9
What is a “Critical Operation”?
•Critical Operation (CR) - any operation
that, if removed, revised, or changed in
sequence, may affect the quality or integrity
of the final product.
10
What are some examples of Critical
Operations?
•
•
•
•
•
•
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
11
How are Critical Operations identified
on the planning?
• 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.
12
Changes to Critical Operations
• 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.
13
Changes to Critical Operations
•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.
14
What if “Critical Operations” are
not changed?
• 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.
15
What if “Critical Operations” are
not changed?
• 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.
16
Control of Planning Revisions
• 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”.
17
Control of Planning Revisions
• 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.
18
Where and How changes are to be
submitted
• 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
19
Where and How changes are to
be submitted
• 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
20
Other Key Changes
• 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.”
21
Other Key Changes
• 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 noncritical operations) may be submitted to
RM&PE and RQA for approval prior to the
delivery of the affected hardware.”
22
Other Key Changes
• 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.”
23
RPS 20.17 Training Record
• Date of Training ________________
• Attendee’s of Training
____________
____________
____________
____________
____________
____________
• Instructor: David Hollings
24