Service Instruction No. 1577

Intake Valve In-Service Data

  • Publications

Service Instruction No. 1577

Intake Valve In-Service Data
DATE:

November 10, 2020

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

TIME OF COMPLIANCE:

During the next scheduled 50-hour inspection for engines with less than 500 hours since new, rebuild, overhaul, or cylinder replacement. Then every 50 hours until 500 hours since new, rebuild, overhaul, or cylinder replacement. At next scheduled 100-hour inspection for engines with more than 500 hours since new, rebuild, overhaul, or cylinder replacement.

Product Support Network

Wherever you are in the world, you have access to exceptional expertise and knowledge about Lycoming engines. Get the most comprehensive customer service and support in the general aviation industry.

Get It Exchanged

Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.