DM

Applicability: 1. Textron Lycoming TIO-540 and LTIO-540 series engines with a rated take-off power of 300 horsepower or greater; and

2. Textron Lycoming IO-540 series engines modified by a Supplemental Type Certificate (STC) listed in Table 1 of this directive, regardless of the rated horsepower

Note 1: Applicable IO-540 powered aircraft include the Ted Smith/Piper PA-60 601 and 601P models.

Note 2: FAA Airworthiness Directive 2002-19-03 Amdt 39-12883 refers.

Requirement: 1. Textron Lycoming TIO-540 and LTIO-540 series engines with a rated take-off power of 300 horsepower or greater and listed by serial number in Table 2 of this directive:

A CAR 42ZC (6) authorised representative of Textron Lycoming to obtain a sample of the crankshaft material for the purpose of metallurgical evaluation in accordance with Textron Lycoming Mandatory Service Bulletin (MSB) 553; and
Following compliance with Requirement 1a of this Directive; applicable engines may only be returned to service following receipt of Textron Lycoming documented evidence that confirms the material sample was found not to exhibit any metallurgical anomalies; and

c. The Textron Lycoming notification of the result of the metallurgical evaluation is to be retained in the engine logbook as an engine record.

2. Textron Lycoming TIO-540 and LTIO-540 series engines with a rated take-off power of 300 horsepower or greater and listed by serial number in Table 3 of this directive:

A sample of the crankshaft material is to be taken in accordance with Requirement 1 (a), (b) and (c) of this directive.