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Service Letters | 08.17.21
Service Letter No. L 287
Increased Fuel Economy and Improved Manifold Pressure Stability
Service Instructions | 07.21.21
Service Instruction No. 1280 D
Rotator Type Intake Valves
Service Bulletins | 06.17.21
Service Bulletin No. 642 A
Incorrect Piston and Ring Combination
Service Instructions | 04.21.21
Service Instruction No. 1569 B
Installation, Operation, and Maintenance of Lycoming Electronic Ignition System (EIS)
Service Letters | 03.17.21
Service Letter No. L 284
Blemish on Cylinder Barrel
Service Letters | 02.23.21
Service Letter No. L 283
Alternate Ignition System
Maintenance Manuals | 02.23.21
YO-233-B2A Maintenance Manual
DOCUMENT PART NO. MM-YO-233
Service Letters | 12.13.20
Service Letter No. L 282
Australian Fuel Testing
Service Instructions | 11.19.20
Service Instruction No. 1579
Exhaust System Replacement Components
Service Instructions | 11.09.20
Service Instruction No. 1577
Intake Valve In-Service Data
Service Instructions | 08.06.20
Service Instruction No. 1316 A
Repair of Oil Cooler By-Pass Valve Seat
Service Instructions | 07.30.20
Service Instruction No. 1014 N
Lubricating Oil Recommendations
Reference Documents | 04.30.20
Special Service Publication No. SSP-110-2
CERTIFICATED ENGINE LIST
Service Instructions | 04.23.20
Service Instruction No. 1009 BE
TIME BETWEEN OVERHAUL (TBO) SCHEDULES
Service Instructions | 04.21.20
Service Instruction No. 1060 U
PUSH ROD IDENTIFICATION
Parts Catalog | 04.21.20
IO-390-D Series Engine Illustrated Parts Catalog
DOCUMENT PART NO. PC-IO-390-D
Service Instructions | 04.15.20
Service Instruction No. 1154 W
FAA-APPROVED STARTERS AND ALTERNATORS
Reference Documents | 04.12.20
Special Service Publication No. SSP-1776-5
SERVICE TABLE OF LIMITS AND TORQUE VALUE RECOMMENDATIONS
Service Instructions | 04.08.20
Service Instruction No. 1098 Q
PROPELLER FLANGE BUSHING LOCATION
Service Bulletins | 04.08.20
Service Bulletin No. 369 S
ENGINE INSPECTION AFTER OVERSPEED