Service Bulletin No. 411 D
October 30, 2015
Service Bulletin No. 621 B
October 5, 2015
MODELS AFFECTED
IO-320, -360, -390, -540, -580; AEIO-320, -360, -390, -540; LIO-320-B1A; O-320-B2D, -D1D; (L)O-360-A1H6, -A1N6, -A1G6D; HIO-360; LIO-360; O-360-A1H, -A2G, -A4G, -A4J, -A4K, -A1G6, -C1F, -C4F; O-540-L3C5D; and TO-360-C1A6D
TIME OF COMPLIANCE
50 hours from the issue date of this Service Bulletin or the next regularly scheduled maintenance event (whichever occurs first)
REASON FOR REVISION
Added new affected engine models.
Service Instruction No. 1526 G
Supersedes Service Instruction No. 1526F
July 24, 2015
MODELS AFFECTED
All Lycoming reciprocating aircraft engines
TIME OF COMPLIANCE
As required for replacement
REASON FOR REVISION
Added new piston part number
Service Instruction No. 1129 D
Supersedes Service Instruction No. 1129C
July 23, 2015
MODELS AFFECTED
All Lycoming direct drive engine models
TIME OF COMPLIANCE
During periodic maintenance inspection of the engine and at anytime the alternator or generator belt is installed.
REASON FOR REVISION
Corrected NM torque values in Table 1
Supplement No. 1 To Service Bulletin No. 608
DATE: May 7, 2015
REASON FOR SUPPLEMENT
Additional affected engines in Tables C and D. Added Table E in the attached bulletin.
You must have a released copy of Service Bulletin No. SB-608 for reference as you review this supplement. If you have complied with Service Bulletin No. SB-608 and do not have any fuel pumps in Tables C or D in this Supplement No. 1 to Service Bulletin No. SB-608, no further compliance is necessary.
Service Bulletin No. 619
DATE: April 9, 2015
MODELS AFFECTED
O-320-H2AD, O, LO, TO, LTO-360-E1A6D.
TIME OF COMPLIANCE
Refer to Table 1 in the attached bulletin.
This Service Bulletin is in response to a single field report of one excessively worn rocker arm found during an investigation of reported engine roughness. Results of material analysis at Lycoming Engines show that the rocker arm had not been case hardened, as required, during manufacturing.
IO-540-D4B5 Parts Catalog
DATE RELEASED:
April 2015
TITLE:
IO-540-D4B5 Parts Catalog
DOCUMENT PART NUMBER:
PC-IO-540-D485
MODELS AFFECTED:
PC-IO-540-D485
Service Letter No. 263
March 11, 2015
To All Owners and Operators of Lycoming IO-540-AC1A5 and TIO-540-AJ1A Engine Models
This Service Letter is in response to reports of discolored paint on engine cylinders of IO-540-AC1A5 and TIO-540-AJ1A engine models. Discoloration on an engine cylinder can be the result of the unique engine configuration and the ecologically friendly paint applied to the cylinder at the factory and is not necessarily an indication of heat build-up or other problems that can cause discoloration.
IO-540-K1A5 Parts Catalog
DATE RELEASED:
February 2015
TITLE:
IO-540-K1A5 Parts Catalog
DOCUMENT PART NUMBER:
PC-615-K1A5
MODELS AFFECTED:
IO-540-K1A5, IO-540-K1A5D
NOTES:
This parts catalog, PC-615-K1A5 Series (models IO-540-K1A5, IO-540-K1A5D) supersedes the previous IO-540-K1A5, IO-540-K1A5D model engines which are covered in PC-615
Service Letter No. 262
December 31, 2014
Models Affected
All Owners and Operators of Lycoming Aircraft Engines
Table 1 of this Service Letter identifies new piston ring part numbers (P/N) that replace existing piston ring part numbers. All of the new piston rings are equivalent to the existing piston rings. Existing and new piston rings can be mixed in the same engine, but be sure to use either all new piston rings in a cylinder or all existing piston rings in a cylinder. Do not mix old and new piston rings on the same cylinder.