# STAGE C BATCH 004 FINAL RE-AUDIT REPORT — REV1

## Audit Summary

Audit object: `STAGEC_BATCH004_DATABASE_REV1.zip`

Role: **AI Engineering Database Auditor**

Final decision: **PASS WITH OPEN GAPS**

Freeze eligibility: **APPROVED**

## 1. Correction-Scope Audit

REV1 was compared against the original Batch004 package. Registry cardinality and all IDs were preserved. Only the fields required by the prior independent audit were changed:

- 3 Source `Reference` fields: `SRC-C-000109`, `SRC-C-000110`, `SRC-C-000111`.
- 3 Evidence fields across `EVD-C-000197` and `EVD-C-000204`.
- 2 Claim fields: `CLM-C-000197`, `CLM-C-000204`.
- 2 Validation fields: `VAL-C-000197`, `VAL-C-000204`.
- No Risk, Traceability, Gap, or historical frozen record was modified.

Result: **PASS**.

## 2. Source Integrity Re-Audit

The three ASTM references that previously blocked freeze now match the official ASTM publisher titles:

- ASTM D8066/D8066M-23 — Standard Practice Unnotched Compression Testing of Polymer Matrix Composite Laminates.
- ASTM D8131/D8131M-23 — Standard Practice for Tensile Properties of Tapered and Stepped Joints of Polymer Matrix Composite Laminates.
- ASTM D8285/D8285M-19(2026) — Standard Practice for Compressive Properties of Tapered and Stepped Joints of Polymer Matrix Composite Laminates by Sandwich Construction Long Beam Flexure.

Official publisher references used in re-audit:

- https://store.astm.org/d8066_d8066m-23.html
- https://store.astm.org/d8131_d8131m-23.html
- https://store.astm.org/d8285_d8285m-19r26.html

Result: **PASS**.

## 3. Evidence Boundary Re-Audit

`EVD-C-000197` now uses source-supported `vacuum consolidation` wording. Hexcel's Prepreg Technology guidance explicitly describes vacuum consolidation during lay-up and repeat consolidation after defined layer intervals.

`EVD-C-000204` is now limited to ASTM E2663 DICONDE data organization/interoperability scope and explicitly states that the practice does not define a testing or validation procedure.

Result: **PASS**.

## 4. Claim / Validation Governance Re-Audit

`CLM-C-000204` no longer asserts unsupported personnel/equipment qualification requirements. It now states only that DICONDE format compliance does not itself establish ultrasonic inspection validity or engineering acceptance. `VAL-C-000204` requires separate governed validity and acceptance evidence before disposition without inventing a qualification system.

Result: **PASS**.

## 5. Risk Governance

All 50 Risk rows are unchanged. Risks remain potential / process / interpretation / traceability risks and do not assert confirmed failure.

Result: **PASS**.

## 6. Traceability Integrity

Independent registry checks:

- Source: 25 rows, unique IDs.
- Evidence: 50 rows, unique IDs.
- Claim: 50 rows, unique IDs.
- Validation: 50 rows, unique IDs.
- Risk: 50 rows, unique IDs.
- Traceability: 50 rows, unique IDs, all `COMPLETE`.
- Gap: 5 rows, unique IDs.
- No broken foreign keys.
- No orphan Evidence / Claim / Validation / Risk records.
- Trace Source→Evidence→Claim→Validation/Risk relationships are internally consistent.

Result: **PASS**.

## 7. Historical ID / Additive Protection

The embedded approved Batch003 baseline was inspected. Batch003 and Batch004 ID ranges are non-overlapping:

- Source: Batch003 `SRC-C-000073`–`SRC-C-000097`; Batch004 `SRC-C-000098`–`SRC-C-000122`.
- Evidence/Claim/Validation/Risk/Traceability: Batch003 `000109`–`000158`; Batch004 `000159`–`000208`.
- Gap: Batch003 `GAP-C-000015`–`GAP-C-000019`; Batch004 `GAP-C-000020`–`GAP-C-000024`.

Result: **PASS**.

## 8. Frozen Baseline Integrity

Embedded Batch003 baseline:

`PICKLEBALL_DATABASE_APPROVED_FROZEN_BASELINES_THROUGH_STAGEC_BATCH003_2026-09-10.zip`

Independent SHA-256 recalculation:

`875cf12e7fe07013c43c304e8953ca3d49e369f952592d6994f4b0e0ecf2a954`

This exactly matches the supplied integrity manifest and prior version index. Byte size is `1,695,499` bytes.

Result: **PASS**.

## 9. Performance Leakage Audit

No data record contains Performance Score, Power Ranking, Spin Ranking, Control Ranking, Product Ranking, OEM Recommendation, Confirmed Failure, or Lifetime Prediction constructs.

Result: **PASS**.

## 10. Open Gap Registry

Five source gaps remain open and are preserved rather than converted into unsupported evidence:

1. Composite failure mechanisms — no approved paddle-specific coupon-to-production damage/load-spectrum mapping.
2. Composite structural mechanics — no approved paddle boundary conditions/load paths/configuration-specific allowables.
3. Advanced laminate architecture — no controlled production stacks/tolerances/hygrothermal/joint substantiation.
4. Composite process control — no production prepreg specification/traveler/cure/thermal-survey/batch records.
5. Advanced quality inspection — no paddle-specific NDT qualification/known-defect/POD/acceptance criteria.

These gaps do not invalidate the source-bounded engineering intelligence chains.

## 11. Final Decision

# PASS WITH OPEN GAPS

`STAGE C BATCH004 REV1` is approved for inclusion in the Engineering Intelligence Database and is eligible to become the next cumulative immutable frozen baseline.