Purpose
About This Log
This log records every formal change against the program's engineering baseline or internal process since contract award — what changed, why, and who approved it. Changes affecting form, fit, or function require a Meridian-approved Engineering Change Notice (ECN) regardless of cost impact; process, tooling, and documentation changes that don't touch Meridian's engineering baseline are approved internally, per the decision-rights tiering in the Program Governance Model §3 and §6.
Summary
Changes at a Glance
11 Changes on record — all Approved.
Showing all 11 changes
Log
Change Detail
CN-001
Approved
Correct Part Marking Specification Reference
A drawing reference number in the part marking spec pointed to a superseded revision; corrected to the current revision with no change to the marking requirement itself.
View Full Change Document (CN-001) →
CN-002
Approved
Clarify Edge-Trim Tolerance Callout
First Article Inspection found the edge-trim tolerance callout ambiguous between two adjacent drawing views; clarified wording, no change to the actual tolerance value.
FAI
View Full Change Document (CN-002) →
CN-003
Approved
Revise FAI Checklist Acceptance Criteria Wording
Customer source-inspection auditor flagged 2 acceptance criteria as ambiguous (RAIDD I-04); checklist reworded with unambiguous pass/fail criteria for all subsequent article runs.
RAIDD I-04
View Full Change Document (CN-003) →
CN-004
Approved
Update Program Baseline for Corrected Staffing Model
Formalized the 14→25-person staffing correction into the program's standing resource and schedule baseline, ahead of Phase 2 production ramp.
Resource PlanRAIDD D-05
View Full Change Document (CN-004) →
CN-005
Approved
Approve Immersion Ultrasonic Testing as Alternate NDT Method
Added immersion ultrasonic testing as a Meridian-approved alternate inspection method to contact UT, supporting the corrected two-shift NDT staffing model without changing acceptance criteria.
RAIDD I-02
View Full Change Document (CN-005) →
CN-006
Approved
Revise Layup Fixture Preventive Maintenance Schedule
Root cause corrective action following MRB-004 (ply misalignment traced to fixture wear) — added a standing preventive-maintenance schedule for the layup fixture. No change to the part or its acceptance criteria.
MRB-004
View Full Change Document (CN-006) →
CN-007
Approved
Add Repair Limits Table for Oversized Fastener Holes
Formalized the rework disposition used in MRB-001 and MRB-003 into a standing repair-limits table, so future oversized-fastener-hole findings within the approved range don't each require a fresh MRB rework disposition.
MRB-001, MRB-003
View Full Change Document (CN-007) →
CN-008
Approved
Add Second Approved Source for Composite Prepreg Material
Added a second qualified supplier to the drawing's approved-source list for the primary composite prepreg material, closing out RAIDD R-01's single-source schedule exposure (RAIDD Decision D-03).
RAIDD R-01, D-03
View Full Change Document (CN-008) →
CN-009
Declined
Accept deviation to ship panels with porosity above drawing limit
Declined. The porosity limit is a design allowable tied to the stress substantiation, not an inspection convention — a deviation would change what the part is qualified to carry. MRB rework authorized instead and the delivery slot renegotiated.
MRB LogFAI Checklist
View Full Change Document (CN-009) →
CN-010
Declined
Reduce first article inspection to AQL sampling on dimensional characteristics
Declined. AS9102 FAI verifies every characteristic once, before process capability is established — sampling assumes the stability the FAI exists to prove. Four of the nine days recovered by parallelizing CMM programming with tooling proveout.
FAI ChecklistControl Plan
View Full Change Document (CN-010) →
CN-011
Deferred
Install automated ultrasonic scanning cell for in-process NDT
Deferred, not declined. Technical case accepted; the cell could not be NADCAP-qualified before this build concludes, so its benefit accrues to follow-on work while its disruption lands here. Business case handed to capital planning rather than closed.
RAIDD R-01Control Plan
View Full Change Document (CN-011) →
Reference
How to Use This Log
- Every change receives a sequential CN # and is logged here once approved at the correct authority tier — Acme-internal for Tier 1/2 process, tooling, and documentation changes; Meridian Program Office for Tier 3 changes touching form, fit, or function.
- The "Related" pills show which other program artifacts a change traces back to or updates — several changes here trace directly to a RAIDD risk, issue, or decision, or to a specific MRB case, rather than existing in isolation.
- Two of the eight changes (CN-005, CN-007) are true Engineering Change Notices requiring Meridian approval; the rest are Acme-internal process, documentation, or schedule/resource changes that don't touch the customer's engineering baseline.