Propeller Owner’s Manual
147
MAINTENANCE PRACTICES
61-00-47
Page 6-15
Rev. 16 May/20
3. Corrosion Inhibitor
(Rev. 1)
CAUTION:
INSTRUCTIONS AND PROCEDURES IN
THIS SECTION MAY INVOLVE PROPELLER
CRITICAL PARTS. REFER TO THE
INTRODUCTION CHAPTER OF THIS
MANUAL FOR INFORMATION ABOUT
PROPELLER CRITICAL PARTS. REFER TO
THE ILLUSTRATED PARTS LIST CHAPTER
OF THE APPLICABLE OVERHAUL MANUAL(S)
FOR THE IDENTIFICATION OF SPECIFIC
PROPELLER CRITICAL PARTS.
A. Application Intervals
(1) The bolt-on, steel counterweights on propellers
manufactured after the release date of Service Letter
HC-SL-61-364 dated April, 3, 2020 will be coated with
corrosion inhibitor CM352 by Hartzell Propeller Inc.
during the assembly process.
(a) Corrosion inhibitor CM352 is applied to prevent
corrosion on the counterweight.
(b) Periodic re-application of the corrosion inhibitor
CM352 will provide extended protection from
corrosion.
1
Hartzell Propeller Inc. recommends
re-application of the corrosion inhibitor
CM352 at regularly scheduled intervals,
similar to the lubrication interval specified
in this propeller owner’s manual.