AD Amdt-39-14043

final rule
Data completeness: 90%

Airworthiness Directives; Hartzell Propeller Inc. (Formerly TRW Hartzell Propeller) Models HC-B3TN-2, HC-B3TN-3, HC-B3TN-5, HC-B4TN-3, HC-B4TN-5, HC-B4MN-5, and HC-B5MP-3 Turbopropellers

AD Number
Amdt-39-14043
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. 83-ANE-14-AD
FR Citation
70 FR 17315

Unsafe Condition

Propeller attaching bolt failures or improperly secured propellers, which could lead to separation of the propeller from the airplane.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Install all new propellers and serviceable propellers using P/N B-3339 bolts and P/N A-2048-2 washers, or other equivalent FAA-approved serviceable bolts and washers. Apply MIL-T-83483 Petrolated Graphite or Hartzell Lubricant P/N A-3338 to threads of the bolts and flat surfaces of the washers. Torque all attaching bolts to specified values and safety wire them in an FAA-approved manner.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Hartzell Propeller Inc. (formerly TRW Hartzell Propeller) models HC-B3TN-2, HC-B3TN-3, HC-B3TN-5, HC-B4TN-3, HC-B4TN-5, HC-B4MN-5, and HC-B5MP-3 turbopropellers.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 4, 2026

Rights: U.S. Government Public Domain

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