Singapore is one of Asia's largest aviation MRO markets. Companies ranging from ST Engineering subsidiaries to independent component repair shops operate under CAAS Part 145 approval, maintaining civil aircraft, engines, components, and avionics. The documentation burden is high — every repair must be traceable to authorised maintenance data, performed by qualified personnel, and released on a regulatory-approved certificate.
Most Singapore MRO companies manage this with a combination of legacy MRO software (built for airlines, not component shops), spreadsheets, and paper work order packets. The system works until it does not — usually when an audit finds traceability gaps, a customer requests electronic maintenance records, or regulatory changes require documentation formats the legacy system cannot produce.
The five ERP gaps Singapore aerospace and MRO companies consistently hit
1. Serialized part traceability
Standard inventory tracks quantities by part number. Aerospace MRO tracks individual serial numbers — each with its own time-since-new, cycles-since-overhaul, last inspection date, applicable airworthiness directives, and maintenance history. When a customer asks for the life status of a part, the answer must come from the system in seconds, not from a filing cabinet in minutes.
2. Certification document management
Each repair order generates a CAAS Form 1 or equivalent release document, linked to the work order, the approved maintenance data reference, and the certifying staff authorisation. These documents must be stored, retrievable by serial number and work order, and producible on demand for customer and CAAS audits. PDF email attachments in a shared drive is not a traceability system.
3. Repair order workflow with scope change management
Aerospace repair orders follow a defined sequence: component received → incoming inspection → scope of work defined → quote approved → work performed → final inspection → release to service. The complication is scope changes — additional defects found during teardown that require customer authorisation before repair proceeds. These mid-repair scope changes must be documented, quoted, approved, and linked to the final release documentation.
4. Warranty and life-limit tracking
MRO companies must track two types of limits: life limits (parts that must be retired after a fixed number of cycles or hours regardless of condition) and warranty claims (parts within OEM or repair warranty that should be returned rather than repaired). Missing a life limit is an airworthiness violation. Missing a warranty opportunity is a direct cost to the business.
5. PEPPOL e-invoicing for government and airline customers
Singapore MRO companies supplying government agencies (DSTA, SAF) and government-linked aviation entities (Changi Airport Group, ST Engineering subsidiaries) are among the first-wave InvoiceNow mandate targets. Invoices must be issued as PEPPOL BIS 3.0 XML through a certified access point. Legacy MRO systems that generate only PDF invoices require either an access point integration or a replacement billing module.
What a custom build covers for Singapore MRO
- Serialized part registry — each part number / serial number pair with life status, airworthiness directive applicability, and maintenance history
- Repair order management — full workflow from receipt to release: inspection, quote, customer approval, work recording, QC signoff
- Scope change management — mid-repair defect findings with customer notification, revised quote, approval gate, and documentation linkage
- CAAS Form 1 generation — auto-populated release certificates linked to work order, maintenance data reference, and certifying staff
- Warranty tracking — OEM and repair warranty periods with alerts and return-to-vendor workflow for in-warranty components
- Life limit monitoring — retirement alerts based on cycles or hours with quarantine workflow for life-expired parts
- InvoiceNow e-invoicing — PEPPOL BIS 3.0 XML output for government and airline customers
Custom vs legacy airline MRO platforms
Large airline MRO software (AMOS, TRAX, Ultramain) is built for airline-scale operations with thousands of work orders per day and extensive regulatory module depth. Pricing reflects this — annual licence and implementation costs typically exceed S$200,000 for a mid-sized Singapore component shop. These systems are also built for Part 145 heavy maintenance, not component repair operations with 1–5 technicians per cell.
For a Singapore component MRO with 10–80 staff and 50–500 active work orders at any time, a scoped custom build covering the five gaps above costs S$15,000–S$30,000 and runs in 8–14 weeks. The key design decision is not to replicate airline MRO software — it is to solve the specific documentation and traceability gaps that are causing customer complaints, audit findings, or staff hours wasted on paper.
EDG grant support for aerospace MRO workflow systems
The Enterprise Development Grant (EDG) covers productivity and process upgrade projects, including digital repair order management, serialized part traceability, and certification document automation. EDG can offset up to 50% of qualifying costs. The application must be submitted and approved before project work begins — the project plan produced in a Start Canyon Discovery engagement supports the application directly.
A paid Discovery engagement (one week, S$1,500–S$3,000) maps your repair order workflow, traceability gaps, and documentation requirements, and produces a written build plan and fixed quote. For EDG applicants, the Discovery documentation supports the grant application.