Service Instruction No. 1577 A
Service Instruction No. 1577A
INTAKE VALVE IN-SERVICE DATA
DATE:
JANUARY 25, 2023
SUBJECT:
Intake Valve In-Service Data
MODELS AFFECTED:
O-540-F1B5 engines with serial number ending with “-40E” installed in Robinson R44 Raven I and R44 Cadet helicopters
Service Instruction No. 1324 D
Service Instruction No. 1324 D
January 25, 2023
Supersedes Service Instruction No. 1324 C
MODELS AFFECTED
All direct drive series engines.
TIME OF COMPLIANCE
Any time the front crankshaft oil seal is replaced
Service Bulletin No. 649
SERVICE BULLETIN NO. 649
DATE:
December 8, 2022
MODELS AFFECTED:
IO-540-AB1A5
TIME OF COMPLIANCE:
Before next flight
Service Instruction No. 1443 S
SI1443S_Approved_Slick_Magnetos_and_EIS
DATE:
December 8, 2022
SUBJECT:
Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines
MODELS AFFECTED:
See Table 1
TIME OF COMPLIANCE:
Not applicable
REASON FOR REVISION:
Corrected Engine Timing and EIS P/Ns for IO-540-AB1A5 in Table 5.
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