Lycoming Engines (Lycoming) O-320-H, O-360-E, LO-360-E, TO-360-E, LTO- 360-E series engines SAIB NE-06-31

FAA Aircraft Certification Service
SPECIAL AIRWORTHINESS INFORMATION BULLETIN
SAIB: NE-06-31R2

SUBJ: Engine Lubricating Oils Date: April 29, 2009
This is information only. Recommendations aren’t mandatory.

Introduction
This Revised Special Airworthiness Information Bulletin clarifies information (see revision marks
below) previously published in SAIB NE-06-31, dated February 27, 2006, and advises you, owners and operators of Lycoming Engines (Lycoming) O-320-H, O-360-E, LO-360-E, TO-360-E, LTO-360-E series engines of the following approval of an alternative method of compliance (AMOC) to the requirements of airworthiness directive (AD) 80-04-03 R2. All other information remains the same. At this time, this airworthiness concern isn’t an unsafe condition that would warrant airworthiness directive action under Title 14 of the Code of Federal Regulations (14 CFR) part 39.
We have determined that the anti-wear additive contained in the engine lubricating oils listed in
Table 1 of this SAIB is the same as Textron Lycoming additive, LW-16702, and therefore meets the requirements of Lycoming Service Bulletins 446B, 446C, 446D, and 446E. We approved changing to these oil brands as an AMOC to the requirements of AD 80-04-03 R2, paragraph b.1, with the limitations described below.

Background
AD 80-04-03 R2 requires that Textron Lycoming additive, LW-16702, be added to certain O-360 engine models to provide anti-wear protection at engine start. The AD requires the additive to be replenished at each 50-hour oil service interval due to depletion of the additive with service time.
The engine lubricating oils listed in Table 1 of this SAIB contain an additive that is identical to
Textron Lycoming additive, LW-16702. We determined the use of engine lubricating oils listed in
Table 1 of this SAIB provide the necessary anti-wear protection at engine start-up and therefore
satisfies the intent of the AD. As with Textron Lycoming additive, LW-16702, these additized
engine lubricating oils must be replaced at each 50-hour oil service interval to replenish the additive contained in the oil. This can be accomplished either by changing the oil and adding new additized oil, or by adding Textron Lycoming additive, LW-16702, if the oil is not changed.

SAIB Attached