AD 2005-04-08
Unsafe Condition
Possible blade failure near the hub which can result in blade separation, engine separation, damage to the airplane, and possible loss of the airplane.
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Required Actions
Within 10 hours time-in-service after the effective date, perform a document search to verify compliance with Priority Letter AD 88-24-15 or replacement of blades. If not compliant, inspect the blades using Paragraph 3 of Hartzell Service Bulletin No. 136, Revision Letter 'I', within 500 hours time-since-new or time-since-last-overhaul.
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Compliance Time
Within 10 hours time-in-service for document search; within 500 hours time-since-new or time-since-last-overhaul for inspection if not previously compliant.
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Affected Aircraft
Hartzell Propeller Inc. model HC-B3TN-5( )/T10282( ) propellers installed on Fairchild SA226-TC, SA226-AT, and SA226-T airplanes with Garrett TPE331-10UA-511G engines, excluding propellers with blades part number T10282N( ), T10282NB( ), T10282NK( ), or T10282NE( ). Also includes airplanes with Supplemental Type Certificates SA344GL-D, SA4872SW, and SA345GL-D.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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