MAINTENANCE PRACTICES
61-00-36
Page 6-27
Rev. 2 Feb/17
Propeller Owner's Manual
136
6. Propeller Low Pitch Setting
WARNING 1: RPM ADJUSTMENTS MUST BE MADE
WITH REFERENCE TO A CALIBRATED
TACHOMETER. AIRCRAFT MECHANICAL
TACHOMETERS DEVELOP ERRORS OVER
TIME, AND SHOULD BE PERIODICALLY
RECALIBRATED TO MAKE SURE THE
PROPER RPM IS DISPLAYED.
WARNING 2: LOW PITCH BLADE ANGLE ADJUSTMENTS
MUST BE MADE IN CONSULTATION WITH
THE APPLICABLE TYPE CERTIFICATE
OR SUPPLEMENTAL TYPE CERTIFICATE
HOLDERS MAINTENANCE DATA.
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. Low Pitch
(1) The propeller low pitch stop is set at the factory to the
aircraft TC or STC Holder's requirements and should
not require any additional adjustment. The TC or STC
Holder provides the required low pitch stop blade angle
and may also provide the acceptable RPM range for
a maximum power static condition. Be aware that the
aircraft TC or STC holder may specify the static RPM to
be less than the RPM to which the engine is rated.
(2) An overspeed at the maximum power static condition
may indicate that the propeller low-pitch blade angle is
set too low or that the governor is improperly adjusted.
