MAINTENANCE PRACTICES
61-00-15
Page 6-17
Rev. 24 Dec/20
Propeller Owner's Manual
115N
4. Air Charge (-2 and -5 Propellers)
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. Charging the Propeller
WARNING:
EXCEPT FOR THE HC-C3YF-5F
PROPELLER, DO NOT AIR CHARGE
THE CYLINDER OR MEASURE THE AIR
CHARGE ON A PROPELLER THAT IS IN
FEATHER POSITION.
(1) Examine the propeller to make sure that it is positioned
on the start locks.
(2) Using proper control, charge the cylinder with dry air or
nitrogen.
(a) The air charge valve is located on the cylinder as
indicated in Figure 6-1.
(b) Nitrogen is the preferred charging medium.
CAUTION:
MAKE SURE THAT THE GAUGE IS
CALIBRATED BEFORE CHARGING
THE CYLINDER OR MEASURING
THE AIR PRESSURE.
(c) Use an appropriate tool that has a calibrated gauge
to charge the cylinder or measure air pressure in the
propeller.
(d) The correct charge pressure is identified in Table 6-1
through Table 6-10 in this chapter.
