Service Bulletin No. 649
SERVICE BULLETIN NO. 649
DATE:
December 8, 2022
MODELS AFFECTED:
IO-540-AB1A5
TIME OF COMPLIANCE:
Before next flight
Service Bulletin No. 628 A
REPRINT OF HARTZELL ENGINE TECHNOLOGIES’ (HET) ALERT SERVICE BULLETIN (ASB) 076
DATE:
December 8, 2022
MODELS AFFECTED:
Lycoming engine models using the HET model 200F, 201F or 202F series fuel pump.
TIME OF COMPLIANCE:
Next maintenance event not to exceed 25 hours.
REASON FOR REVISION:
Update to the new ASB 076 which obsoletes ASB 069.
Service Bulletin No. 651
Service Bulletin No. 651
Inspection for Rotator Caps on Intake Valves
September 29, 2022
MODELS AFFECTED
O-540-F1B5 and O-360-J2A engines with serial number identified in Table 1
TIME OF COMPLIANCE
Engines with less than 300 hours, inspect at next scheduled maintenance event not to exceed 50 hours of operation. Engines with 300 hours or more must be inspected within next 10 hours of operation.
Service Instruction No. 1583
SERVICE INSTRUCTION NO. 1583
DATE:
May 18, 2022
SUBJECT:
Front Expansion Plug Replacement
MODELS AFFECTED:
All Lycoming opposed series engines using a front expansion plug
TIME OF COMPLIANCE:
As necessary when front expansion plug replacement is required
Service Bulletin No. 646 A
Service Bulletin No. 646A
T-Bolt Clamp Inspection
April 22, 2022
MODELS AFFECTED
Lycoming Engines models TEO-540-C1A; TIO-540-R2AD, -W2A; (L)TIO-540-F2BD, -J2B, -J2BD
TIME OF COMPLIANCE
Inspection of non-conforming T-bolt clamp every 50 hours or replacement with conforming T-bolt clamp at owner’s discretion. Replacement with conforming T-bolt clamp must not exceed 12 months.
Service Instruction No. 1533 E
Supersedes Service Instruction No. 1533 D
April 7, 2022
MODELS AFFECTED
All Lycoming reciprocating aircraft engines using rotary-style fuel pumps
TIME OF COMPLIANCE
As Required for Replacement
REASON FOR REVISION
Added 62E28152 fuel pump to Table 1
Service Letter No. L 289
SERVICE LETTER NO. L289
Valve Spring Part Numbers
DATE POSTED:
March 2, 2022
TO:
All Owners, Operators, and Maintenance Providers of Lycoming Aircraft Engines
REASON FOR PUBLICATION:
Lycoming has released new valve springs with new part numbers that are interchangeable with the old valve springs.
Service Instruction No. 1587
SERVICE INSTRUCTION NO. 1587
DATE:
February 3, 2022
SUBJECT:
Reprint of AVStar Service Information Letter No. AFS-SIL-03
MODELS AFFECTED:
All Lycoming engine models with an AVStar LVC-3-3A, LVC-3-3PA, LVC-5-4PA, LVC-5-5BPA, LVC-5-5PA, LHC-6-6BPA & LHC-6-6BA
TIME OF COMPLIANCE:
Whenever adjustments are made to an AVStar carburetor installed on a Lycoming engine
Service Instruction No. 1586
SERVICE INSTRUCTION NO. 1586
DATE:
December 2, 2021
SUBJECT:
Oil Cooler Bypass Valve Assembly Replacement
MODELS AFFECTED:
Lycoming TEO-540-C1A
TIME OF COMPLIANCE:
At next scheduled oil change
Service Letter No. L 288
SERVICE LETTER NO. L288
Alternate Bolt Locking of Wastegate Solenoid Valve
DATE:
December 16, 2021
TO:
Owners and Operators of Lycoming TEO-540-C1A
REASON FOR PUBLICATION:
This Service Letter announces that the repetitive need to remove and install safety wire on the solenoid valve attaching bolt can be eliminated by usage of lock washer P/N STD-160 in combination with Loctite® 243 or equivalent.