# STAGE C BATCH 004 FINAL AUDIT REPORT

Audit object: `STAGEC_BATCH004_DATABASE.zip`
Audit role: AI Engineering Database Auditor
Final decision: **FAIL — FREEZE BLOCKED**

## 1. Audit Summary

The Batch004 engineering data delta is structurally strong and the 50 traceability chains are complete. The package contains 25 sources, 50 evidence records, 50 claims, 50 validation records, 50 risk records, 50 traceability records, 5 open gaps, and 37 QA rows.

However, the package is not eligible for freeze in its current form because the independent audit found source-reference metadata inaccuracies and the submitted package does not contain the approved Batch003 frozen baseline artifact needed to independently verify frozen-baseline immutability and construct the required cumulative frozen package.

## 2. Package Integrity

Required files are present:

- `STAGEC_BATCH004_REPORT.md`
- `database/source_registry.csv`
- `database/evidence_registry.csv`
- `database/claim_registry.csv`
- `database/validation_registry.csv`
- `database/risk_registry.csv`
- `database/traceability_registry.csv`
- `database/gap_registry.csv`
- `database/qa_report.csv`

Result: PASS.

## 3. Registry Counts

| Registry | Rows |
|---|---:|
| Source | 25 |
| Evidence | 50 |
| Claim | 50 |
| Validation | 50 |
| Risk | 50 |
| Traceability | 50 |
| Gap | 5 |
| QA | 37 |

## 4. Traceability Integrity

Independent checks found:

- No duplicate primary IDs in the seven data registries.
- No missing Source → Evidence links.
- No missing Evidence → Claim links.
- No missing Claim → Validation links.
- No missing Claim → Risk links.
- No broken Traceability foreign keys.
- No relational mismatch inside the 50 Traceability chains.
- All 50 Traceability rows are marked COMPLETE.

Result: PASS.

## 5. Engineering Boundary Audit

No prohibited performance leakage was found.

No:

- Performance Score
- Power Ranking
- Spin Ranking
- Control Ranking
- Product Ranking
- OEM Recommendation
- Confirmed Failure
- Lifetime Prediction

Claims remain engineering-governance statements and generally preserve coupon / test-method / configuration boundaries.

Result: PASS WITH OBSERVATIONS.

## 6. Source Authenticity Audit

The submitted designations were checked against official ASTM, ISO, NASA, and Hexcel publisher material. The source set is substantially authentic.

Confirmed source families include:

- ASTM D6264/D6264M-23
- ASTM D7137/D7137M-23
- ASTM D7615/D7615M-23
- ASTM D6873/D6873M-23
- ASTM C394/C394M-16(2024)
- ASTM D6641/D6641M-23
- ASTM D7078/D7078M-20(2025)
- ASTM D5448/D5448M-22
- ASTM D5450/D5450M-22
- ASTM D5467/D5467M-97(2025)
- NASA RP-1351
- ASTM D8066/D8066M-23
- ASTM D8131/D8131M-23
- ASTM D8285/D8285M-19(2026)
- ASTM D7956/D7956M-16(2024)
- ASTM D8336-24
- ASTM E1356-25
- ASTM E2160-23
- ASTM E220-25
- Hexcel Prepreg Technology
- ASTM E2581-14(2023)
- ASTM E2862-23
- ASTM E2663-25
- ASTM E2374-16(2021)
- ISO 16810:2024

### Source-reference defects requiring correction

1. `SRC-C-000109`

Submitted title:
`Unnotched Compressive Strength of Polymer Matrix Composite Laminates`

Official title:
`Standard Practice Unnotched Compression Testing of Polymer Matrix Composite Laminates`

2. `SRC-C-000110`

Submitted title:
`Tapered and Stepped Joints of Polymer Matrix Composite Laminates`

Official title:
`Standard Practice for Tensile Properties of Tapered and Stepped Joints of Polymer Matrix Composite Laminates`

3. `SRC-C-000111`

Submitted title:
`Compressive Strength of Tapered and Stepped Joints of Polymer Matrix Composite Laminates`

Official title:
`Standard Practice for Compressive Properties of Tapered and Stepped Joints of Polymer Matrix Composite Laminates by Sandwich Construction Long Beam Flexure`

These are not fake standards, but the Reference field is not exact enough for a frozen auditable registry.

Result: FAIL FOR FREEZE UNTIL CORRECTED.

## 7. Evidence / Claim Observation

`EVD-C-000197` describes Hexcel guidance using the word `debulking`. The reviewed Hexcel manual directly discusses repeated vacuum consolidation during layup, but the visible source text uses `consolidation` rather than `debulking`.

For frozen evidence governance, either:

- replace `debulking` with `vacuum consolidation`, or
- cite an additional controlled Hexcel source that explicitly uses `debulking`.

No ID change is required.

`CLM-C-000204` states that a DICONDE-compliant record remains subject to procedure qualification, equipment verification, personnel qualification, and approved disposition criteria. ASTM E2663 directly governs interoperability / storage and explicitly does not define a testing or validation procedure. The specific positive requirements for personnel qualification and disposition should either be narrowed to the source-supported boundary or be supported by an additional allowed source.

Result: CORRECTION REQUIRED BEFORE FREEZE.

## 8. Validation and Risk Governance

Validation records remain test / measurement / verification / documentation requirements.

Risk records remain potential risks and do not assert confirmed failure.

Result: PASS.

## 9. Open Gap Registry

Five open source gaps are properly recorded:

- Composite failure mechanisms
- Composite structural mechanics
- Advanced laminate architecture
- Composite process control
- Advanced quality inspection

No gap was converted into unsupported evidence.

Result: PASS.

## 10. Frozen Baseline Protection Audit

The Batch004 report states:

- approved baseline: `PICKLEBALL_DATABASE_APPROVED_FROZEN_BASELINES_THROUGH_STAGEC_BATCH003_2026-09-10.zip`
- SHA-256 before production: `875cf12e7fe07013c43c304e8953ca3d49e369f952592d6994f4b0e0ecf2a954`
- SHA-256 after production: identical

However, that Batch003 frozen ZIP is not contained in the submitted audit package, so the independent auditor cannot recalculate the hash or compare the actual frozen bytes.

The package is therefore insufficient to independently prove historical immutability or to construct the required cumulative `THROUGH_STAGEC_BATCH004` frozen package.

Result: FAIL FOR FREEZE.

## 11. Final Decision

# FAIL

Meaning:

- Batch004 is not rejected as unusable engineering work.
- The 50-chain data structure passes.
- The package is **not yet eligible to become an APPROVED FROZEN BASELINE**.
- No frozen Batch004 ZIP should be created from this submission.

Required action:

Produce a corrected `STAGEC_BATCH004_DATABASE_REV1.zip` with the exact source-reference corrections, the evidence/claim boundary corrections above, and the exact approved Batch003 frozen baseline artifact / integrity manifest required for independent freeze verification.