AD 81-12-06 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bendix | Lycoming Engines | Magnetos | Airworthiness Directives; BENDIX: Applies to Bendix Engine Products Division D-3000 and D-3200 (Blue) series magnetos |
| aircraft | Bendix | Lycoming Engines | LTIO-540-J2BD | Airworthiness Directives; BENDIX: Applies to Bendix Engine Products Division D-3000 and D-3200 (Blue) series magnetos |
| aircraft | Bendix | Lycoming Engines | TIO-540-J2BD | Airworthiness Directives; BENDIX: Applies to Bendix Engine Products Division D-3000 and D-3200 (Blue) series magnetos |
Unsafe Condition
Loose distributor gear rotating electrodes on Bendix D-3000 and D-3200 (Blue) series magnetos with 100 or more hours in service since new or overhaul may cause bronze colored particles and metal-to-metal contact, leading to engine piston damage or reduced valve tappet clearance.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect distributor gears and block for bronze particles and metal-to-metal contact, check rotating electrode looseness, inspect engine pistons and valve tappet clearance if contamination is found, replace gears with laser welded assemblies marked 'Z', 'XO', or 'L', and log compliance with magneto serial number. Equivalent procedures require FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before further flight (for magnetos with 100+ hours) and every 50 hours in service thereafter until gears are replaced
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Affected Aircraft
Bendix Engine Products Division D-3000 and D-3200 (Blue) series magnetos with serial numbers below 1423 on AVCO Lycoming TIO/LTIO-540-J2BD engines, and all D-3000/D-3200 magnetos with serial numbers 100-1968 not previously addressed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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