Can you recommend a document control software for managing service bulletins and airworthiness directives with approval workflows?

Yes — for service bulletins (SBs) and airworthiness directives (ADs) with formal approval workflows, you’ll usually want an Aviation Document Control / QMS / DMS platform rather than a generic file repository.

Good options to consider

1) Intelex

• Strong quality management and document control
• Configurable review/approval workflows
• Good for controlled documents, revisions, audit trails, and compliance records
• Often used in regulated industries, including aerospace

2) MasterControl

• Very strong for controlled documents and approval routing
• Robust audit trail, version control, and e-signatures
• Good fit if you need strict compliance and traceability
• Can be more expensive/enterprise-focused

3) ETQ Reliance

• Flexible quality and compliance management
• Strong workflow automation for document review and approvals
• Good reporting and audit capabilities
• Suitable if you want a configurable system for multiple processes, not just docs

4) Aconex / Autodesk Construction Cloud / SharePoint + workflow tools

• These are more general document-control platforms
• Can work if your organization already uses them, but they may need significant customization to handle aviation-specific controls well
• Best if you have a strong internal admin team

5) OpenText Documentum

• Very powerful enterprise document management
• Good for complex approval chains, records management, and governance
• Usually best for large organizations with IT resources

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If you need aviation-specific document tracking

If your main need is specifically:

• SB/AD tracking
• applicability by aircraft tail number / fleet / ATA chapter
• revision history
• compliance sign-off
• audit-ready records

then ask vendors whether they support:

• airworthiness compliance workflows
• document applicability tracking
• mandatory review by engineering / maintenance / QA
• e-signatures and audit trails
• retention policies
• integration with MRO/ERP systems

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My practical recommendation

• Best all-around enterprise choice: MasterControl
• Best configurable quality/compliance platform: ETQ Reliance
• Best if you want broad QMS + doc control: Intelex

If you want, I can also give you:

1. a shortlist by company size (small / mid / large), or
2. a feature comparison table specifically for SB/AD workflow needs.