AD 79-13-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Dornier Luftfahrt GmbH | Do 28 D | Airworthiness Directives; Dornier GmbH Model Do 28 D-2 Airplanes |
Unsafe Condition
Corrosion, accumulation of water, and pipeline chafing in the engine fire extinguishing system pipelines could lead to system failure.
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Required Actions
Inspect the engine fire extinguishing system for corrosion, water accumulation, and pipeline chafing within 25 hours time in service after the effective date. If corrosion or water is found, install a pipeline seal, incorporate pipeline water drainage holes, install a drain valve, and replace corrosion-prone pipelines with stainless steel between the engine fire extinguisher bottle and frame 6020. If pipeline chafing is found, incorporate anti-abrasive protection and install a pipeline securing clamp before further flight.
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Compliance Time
Within the next 25 hours time in service after the effective date of this AD
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Affected Aircraft
Dornier Luftfahrt GmbH Model Do 28 D-2 Skyservant airplanes, serial numbers 4050 and 4301 through 4307
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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