AD 63-19-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | C-2FM3 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | C-2FM4 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | C-2FM5 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | C-2FM6-1 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | C3FR4 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | CS-2FM4 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | CS-2FM5 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | CS-2FM6 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | CS-3FM4 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
| aircraft | Sensenich Propeller Manufacturing Company, Inc. | CS-3FR5 | SENSENICH Models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 Propellers |
Unsafe Condition
Cracks in the wood blade shank and split retaining groove in the blade ferrule, loose or broken lag screws, and cracks in the hub lock ring groove could lead to propeller failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the wood blade shank and split retaining groove in the blade ferrule for cracks, check and tighten lag screws to 160 inch-pounds torque, magnetically inspect the ferrule and hub's ferrous parts, replace blades with broken lag screws, cracked wood shanks, or cracked ferrule before further flight.
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Compliance Time
Within specified intervals based on engine type and propeller time in service: inspections required within 10 hours propeller time after effective date or prior to specific hour limits, followed by recurring inspections every 100 or 300 hours propeller time from last inspection.
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Affected Aircraft
Sensenich Propeller Manufacturing Company, Inc. models C-2FM, CS-2FM, C-3FR4, CS-3FR5, and CS-3FM4 propellers installed on various aircraft including Piper PA-12, -14, -16, -20, -22, Monocoupe 90AL-115, Stinson 108-2 and -3, Bellanca 14-13, and Goodyear GA-2B.
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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