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AGENT v1.0 · ACTIVE

Invoice Check
Engineer Agent

AI agent that audits MRO invoices for aviation operators — validates labor rates, part markups, TAT compliance, and flags overcharges with documented evidence.

View on GitHub Demo Report
// WORKFLOW

Processing Pipeline

A 7-step orchestrated pipeline that takes a raw PDF invoice and produces a structured HTML audit report with findings and evidence.

📄
PDF
Input
→
🔍
Parse &
Extract
→
⚖
Validate
Rates
→
🚩
Flag
Issues
→
📊
Audit
Report
// CAPABILITIES

Key Features

Labor Rate Validation

Compares billed man-hours and hourly rates against contract terms and historical MRO shop data. Flags variances above configurable thresholds (default: 20%).

Part Markup Analysis

Validates part prices against approved price lists and quotation matching. Detects excessive markup on materials, consumables, and rotable components.

TAT Compliance

Verifies turn-around time against SLA commitments in MRO contracts. Identifies AOG breaches, priority service violations, and consequential delay claims.

Contract Matching

Matches invoice line items against approved quotations (JSON format). Detects scope creep, unapproved work orders, and billing for non-contracted services.

// SAMPLE OUTPUT

Sample Audit Findings

Example findings from a typical A-Check invoice audit. The HTML report includes full evidence chain and recommended actions.

Line Item Billed Contract / Ref Variance Status
A-Check Labor (32h @ €180/h) € 5,760 € 4,800 (€150/h) +20% OVERCHARGE
Hydraulic Pump Overhaul € 12,400 € 12,000 (QUO-2026-001) +3.3% REVIEW
Engine Oil SAE 5W-30 (20L) € 480 € 480 (approved list) 0% APPROVED
AOG Part TAT (actual: 52h) Extra charges claimed 24h SLA (contract p.8) +28h breach SLA BREACH
Brake Disc P/N 2550460-3 € 3,200 € 2,800 (approved price) +14.3% REVIEW
// ARCHITECTURE

Module Structure

Modular Python architecture with dedicated validators for each audit dimension. Each module can be configured independently via threshold settings.

invoice-check-engineer/ ├── agent.py # 7-step orchestrator ├── modules/ │ ├── pdf_extractor.py # pdfplumber invoice parser │ ├── mh_comparator.py # labor rate validator │ ├── price_checker.py # part markup analysis │ ├── quotation_matcher.py # contract matching │ ├── warranty_checker.py # warranty eligibility │ ├── duplicate_detector.py# duplicate billing (90% threshold) │ └── report_generator.py # HTML audit report output ├── config/ │ └── thresholds.json # MH 20%, price 15%, quotation 2% └── data/ ├── mh_history.csv # historical labor rate database ├── approved_prices.csv # approved part price list ├── warranty_database.csv# component warranty records └── quotations/ # approved quotations (JSON)
// USAGE

Commands

bash — full audit workflow
# Generate a sample invoice for testing
$ python scripts/generate_sample_invoice.py

# Run full invoice audit with quotation matching
$ python agent.py data/invoice_INV-2026-001234.pdf \
    -q data/quotations/QUO-2026-0001.json

# Audit with custom thresholds
$ python agent.py invoice.pdf --mh-threshold 15 --price-threshold 10

# Output is saved to: output/audit_reports/audit_INV-2026-001234.html