IO-390-A Series Engine Illustrated Parts Catalog
DATE RELEASED:
June 2025
TITLE:
IO-390-A Series Engine Illustrated Parts Catalog
DOCUMENT PART NUMBER:
PC-IO-390-A Rev 1
(L)TO-360-E1A6D Illustrated Parts Catalog
DATE RELEASED:
June 2025
TITLE:
(L)TO-360-E1A6D
Illustrated Parts Catalog
DOCUMENT PART NUMBER:
PC-(L)TO-360-E1A6D
AEIO-360-B1F Illustrated Parts Catalog
DATE RELEASED:
June 2025
TITLE:
AEIO-360-B1F Illustrated Parts Catalog
DOCUMENT PART NUMBER:
PC-AEIO-360-B1F
Service Letter No. 296
June 13, 2025
Service Letter No. L296
Announces obsoleted EIS parts kits
Service Bulletin No. 630B
Service Bulletin No. 630B
(Supersedes Service Bulletin No. 630A)
June 11, 2025
MODELS AFFECTED:
All Lycoming engines
TIME OF COMPLIANCE:
At every maintenance event that requires removal of each cylinder
Service Instruction No. 1593
Service Instruction No. 1593
Incorrectly marked alternator belts.
DATE:
May 12, 2025
MODELS AFFECTED:
TEO-540-C1A
TIME OF COMPLIANCE:
N/A
This Service Instruction is in response to incorrectly marked alternator belts having reached the field on engines or as spare parts.
Service Bulletin No. 656A
REPLACEMENT OF 6-CYLINDER ELECTRONIC IGNITION SYSTEM (EIS)
DATE:
April 2, 2025
MODELS AFFECTED:
All 6-cylinder EIS used in a helicopter application operating in any category
Service Letter No. L 162 B
Service Letter No. L162B
(Supersedes Service Letter No. L162A)
DATE RELEASED:
January 29, 1982
TO:
All Owners, Operators and Service Facilities
Service Bulletin No. 661
Service Bulletin No. 661
STD-35 Plain Washer Replacement
February 20, 2025
MODELS AFFECTED
All Lycoming Reciprocating Aircraft Engines
TIME OF COMPLIANCE
At overhaul or at the next maintenance event which requires removal of STD-35 plain washers, whichever occurs first.
Service Bulletin No. 659
Service Bulletin No. 659
STD-33 Plain Washer Replacement
February 20, 2025
MODELS AFFECTED
All Lycoming Reciprocating Aircraft Engines
TIME OF COMPLIANCE
At overhaul or at the next maintenance event which requires removal of STD-33 plain washers, whichever occurs first.