AD 56-19-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Standard | Propeller Blades | HAMILTON STANDARD Model 2J17 Propellers |
Unsafe Condition
Corrosion and defects in Hamilton Standard 2J17 propeller blades could lead to blade failure, and improper operation or maintenance could result in unsafe r.p.m. conditions or deicer system malfunctions.
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Required Actions
Conduct specified inspections (hand magnetic, electrical leakage/resistance checks) at intervals per service bulletin 302; adhere to r.p.m. placard restrictions; avoid using external deicers on metal blade portions; replace blades with serial numbers below 649,400 per inspection schedules; install new sleeves and inspect blades at 1,500-hour intervals.
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Compliance Time
Compliance required as specified herein.
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Affected Aircraft
Hamilton Standard Model 2J17 propeller blades installed on Boeing 377 aircraft, including serial numbers below 649,400 and those with specific model designations (e.g., 2J17H3-8W, 2J17Z3-8W).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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