Latest Service Bulletins
The 30 most recently issued manufacturer Service Bulletins we index, newest first. Every bulletin links to the manufacturer's own notice, and that source is revisited on a scheduled document sweep.
1 FAA directive for aircraft or engines we cover is waiting for our review and is not listed yet. Newest listed: 2026-09-28. Check FAA DRS (opens in a new tab) for the newest directives.
September 2026
Issued 2026-09-10Bulletin
SB26-06
TEMPEST AERO GROUP SERVICE BULLETIN SB-012 (Continental Aerospace Technologies)
Issued 2026-09-09Bulletin
SB 671A
Fuel Pump Leak Inspection and Diaphragm Replacement, Hartzell Engine Tech (HET) Alert Service Bulletin No.233 (Lycoming Engines)
Issued 2026-09-09Bulletin
SB 671
Fuel Pump Leak Inspection and Diaphragm Replacement, Hartzell Engine Tech (HET) Alert Service Bulletin No.233 (Lycoming Engines)
August 2026
Issued 2026-08-05Bulletin
SB 670
E-MAG Spark Plug Adapter Inspection, Hartzell Engine Tech (HET) Alert Service Bulletin No.232 (Lycoming Engines)
July 2026
Issued 2026-07-30Bulletin
SI 1485
Exhaust Valve and Guide Identification Procedure (Lycoming Engines)
Lycoming O-235, Lycoming O-320, Lycoming O-360, Lycoming IO-390, Lycoming O-435, Lycoming O-540, Lycoming IO-580, Lycoming IO-720
Issued 2026-07-20Bulletin
SI 1596
Recommended Time Between Overhaul Periods for Engines Affected by and Not in Compliance with AD 2012-19-01 (Lycoming Engines)
Issued 2026-07-20Bulletin
June 2026
Issued 2026-06-30Bulletin
SB 669
Hartzell Engine Tech (HET) Exhaust Bypass Valve Assembly (Lycoming Engines)
Issued 2026-06-30Bulletin
SB CSB26-04
INSPECTION, REMOVAL AND REPLACEMENT OF AFFECTED OIL SUMPS, P/N 652423 (Continental Aerospace Technologies)
Issued 2026-06-29Bulletin
SB26-03
RECOMMENDED REPLACEMENT OF AEL12892 THRUST BUTTONS (Continental Aerospace Technologies)
Issued 2026-06-29Bulletin
SB017
RECOMMENDED REPLACEMENT OF AEL12892 THRUST BUTTONS (Continental Aerospace Technologies)
Issued 2026-06-29Bulletin
SB E-SB007
RECOMMENDED REPLACEMENT OF AEL12892 THRUST BUTTONS (Continental Aerospace Technologies)
Issued 2026-06-25Bulletin
SL L305
Camshaft Kits (Lycoming Engines)
Issued 2026-06-25Bulletin
SL L234
Tool Rental Program (Lycoming Engines)
Lycoming O-235, Lycoming O-320, Lycoming O-360, Lycoming IO-390, Lycoming O-435, Lycoming O-540, Lycoming IO-580, Lycoming IO-720
Issued 2026-06-25Bulletin
SL 385
Rental Service Tools for Lycoming Piston Engines (Lycoming Engines)
Issued 2026-06-25Bulletin
SI 385
Rental Service Tools for Lycoming Piston Engines (Lycoming Engines)
Issued 2026-06-25Bulletin
SB 385
Rental Service Tools for Lycoming Piston Engines (Lycoming Engines)
May 2026
Issued 2026-05-18Bulletin
SI 1154
FAA-Approved Starters and Alternators (Lycoming Engines)
Lycoming O-235, Lycoming O-320, Lycoming O-360, Lycoming IO-390, Lycoming O-435, Lycoming O-540, Lycoming IO-580, Lycoming IO-720
Issued 2026-05-14Bulletin
SL 303
Warranty Repair of Airflow Performance, LLC. Fuel Control Products (Lycoming Engines)
Issued 2026-05-14Bulletin
SI 1597
Cracking of Cylinder-Head Exhaust or Intake Port. (Lycoming Engines)
Issued 2026-05-14Bulletin
SI 1595
Rocker Arm Bushing Installation (Lycoming Engines)
Issued 2026-05-14Bulletin
SI 1125
Alternate Crankcase Parting Surface Sealants (Lycoming Engines)
Issued 2026-05-14Bulletin
SB 640
Starter Wire Contact with Fuel Servo (Lycoming Engines)
Issued 2026-05-06Bulletin
SB SIL675
NEW SERVICE KIT PART NUMBERS AND APPLICATION INFORMATION FOR S‑20, S‑200, AND S‑1200 MAGNETO 500‑HOUR INSPECTION (Continental Aerospace Technologies)
March 2026
Issued 2026-03-30Bulletin
SB125-1030
SB CG 125-1030 P1, Rev. 8, Additional Coolant Liquid Analysis CD-170 260330 (Continental Aerospace Technologies)
Issued 2026-03-16Bulletin
SB643D
MAINTENANCE INTERVALS FOR CONTINENTAL AEROSPACE TECHNOLOGIES (FORMERLY CMI/TCM/BENDIX) S-20, S-200, S-1200 MAGNETOS AND RELATED EQUIPMENT (Continental Aerospace Technologies)
Issued 2026-03-11Bulletin
SB SIL26-02
NEW RIVETED V-BAND COUPLING (CLAMP) 672127 REPLACING 653332 (Continental Aerospace Technologies)
Issued 2026-03-09Bulletin
SB26-01
HARTZELL ENGINE TECH (HET) LLC ALERT SERVICE BULLETIN (ASB) (Continental Aerospace Technologies)
February 2026
Issued 2026-02-10Bulletin
SI 1575
New Connecting Rod Bushing (Lycoming Engines)
Lycoming O-235, Lycoming O-320, Lycoming O-360, Lycoming IO-390, Lycoming O-435, Lycoming O-540, Lycoming IO-580, Lycoming IO-720
Issued 2026-02-10Bulletin