AD 87-15-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hartzell Propeller, Inc. | HC-B4MN-5 | Airworthiness Directives; Hartzell Propeller, Inc. Model HC-B4MN-5( ) Propellers |
Unsafe Condition
Pitch change rod failure which could result in loss of propeller control
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Required Actions
Replace the spring assembly, P/N B-831-54, with spring assembly P/N B-831-64, which includes a strengthened pitch change rod in accordance with Hartzell Service Bulletin No. 153, dated May 1, 1987.
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Compliance Time
next propeller overhaul or within 30 days after the effective date of this AD, whichever occurs sooner
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Affected Aircraft
Hartzell Propeller, Inc. Model HC-B4MN-5 propellers installed on CASA Model C-212-CC and -CF airplanes
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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