Service Bulletin No. 650
INTAKE PIPE AND FLANGE INSPECTION
DATE:
January 4, 2024
Service Bulletin No. 655 - Undersized Turbocharger Journal Bearing
HARTZELL ENGINE TECH (HET) SERVICE BULLETIN (SB) No. 203
DATE:
January 4, 2024
MODELS AFFECTED:
Turbochargers manufactured, rebuilt or overhauled by HET and HET turbocharger Overhaul Kits shipped between 10/31/2022 and 5/17/2023 with less than 50 hours time in-service for the turbocharger.
TIME OF COMPLIANCE:
If applicable, immediately perform a one-time inspection of the affected turbocharger.
Service Letter No. L 279 A
TO:
All Owners and Operators of Lycoming Piston Aircraft Engines
REASON FOR PUBLICATION:
Revised prefixes, letter codes, and descriptions
Service Instruction No. 1532 N
Service Instruction No. 1532 N
APPROVED FUEL INJECTORS, FUEL MANIFOLD ASSEMBLIES, AND FUEL NOZZLE ASSEMBLIES FOR LYCOMING ENGINES
DATE:
December 13, 2023
SUBJECT:
Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines
MODELS AFFECTED:
Engine models in Tables 1, 2, and 3
TIME OF COMPLIANCE:
As required for replacement
REASON FOR REVISION:
Added part numbers for IO-390-C in Table 1
Service Instruction No. 1589
SERVICE INSTRUCTION NO. 1589
DATE:
December 1, 2023
SUBJECT:
Exhaust Bypass Valve Assembly Replacement
MODELS AFFECTED:
Lycoming TEO-540-C1A
TIME OF COMPLIANCE:
At replacement or upon observation of manifold pressure oscillations.
Service Instruction No. 1585 A
SERVICE INSTRUCTION NO. 1585A
DATE:
December 1, 2023
SUBJECT:
Oil Cooler Bypass Valve Assembly Replacement
REASON FOR REVISION:
Revised the first paragraph and replacement instructions based on the option to use either Oil Cooler Bypass Valve Assembly P/N 53E29909 or Oil Cooler Bypass Valve Assembly P/N 53E22144
MODELS AFFECTED:
Lycoming TEO-540-C1A
TIME OF COMPLIANCE:
At owner’s discretion
Service Letter No. L 293
SERVICE LETTER NO. L293
Air Temperature Sensor P/N 60C28409
DATE POSTED:
November 9, 2023
TO:
All Owners and Operators of Lycoming TEO-540-C1A
REASON FOR PUBLICATION:
This Service Letter announces the availability of an enhanced Air Temperature Sensor to be used when replacement of existing sensor is required.
Service Bulletin No. 653
September 8, 2023
Service Bulletin No. 653
Hartzell Engine Tech (HET) Alert Service Bulletin (ASB) No. 098, SB653
MODELS AFFECTED
Lycoming engine models using the HET part number 200F or 202F series fuel pumps with less than 100 hours time-in-service for the fuel pump.
TIME OF COMPLIANCE
Next maintenance event not to exceed 25 hours.
Special Service Publication No. SSP-122 Rev. 1
SPECIAL SERVICE PUBLICATION NO. SSP-122 Rev. 1
Field Service Tool User Manual & Troubleshooting Guide
DATE RELEASED:
September 2023
TITLE:
Field Service Tool User Manual & Troubleshooting Guide, TEO-540 Series Engine Models. Field Service Tool User Manual and Troubleshooting Guide provides information in a separate publication that will allow for easier reference by the customer and allow for more convenient updates to instructions with each FST software release.
DOCUMENT PART NUMBER:
SSP-122 Rev.1
Service Instruction No. 1472
Service Instruction No. 1472
August 12, 1994
MODELS AFFECTED
All Lycoming reciprocating engines.
TIME OF COMPLIANCE
Prior to installation of engine in the aircraft
Prior to shipment from Lycoming, an engine undergoes a preservation treatment. In order to protect the cylinders and related parts preservative oil is sprayed into each cylinder. If an intake valve is open, it is possible for oil to get into the induction system of the engine. For this reason, careful deperservation of an engine is important.