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Hydraulic overspeed governor
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Table of Contents
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Table of Contents
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Table of Contents (Overview)
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List of Revisions
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List of Effective Pages
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General
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Model Application
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Performance Data
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Design and Operation Information
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Installation and Operation Instruction
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Inspections
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Troubleshooting
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Shipping and Storage
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Governor Installation Record
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ATA 61-08-54
(E-3854)
(Avia Manual No. E-1625)
OPERATION- AND INSTALLATION MANUAL
HYDRAULIC OVERSPEED GOVERNOR
P-8S( )-( ) SERIES
Original Issue: 2021-08-13
The technical content of this document is approved under authority of DOA No.
EASA.21J.020.
EASA DE.21G.0008
EASA.21J.020
Table ofContents
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Table of Contents
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Summary of Contents for MT-Propeller P-8S Series
- Page 1 ATA 61-08-54 (E-3854) (Avia Manual No. E-1625) OPERATION- AND INSTALLATION MANUAL HYDRAULIC OVERSPEED GOVERNOR P-8S( )-( ) SERIES Original Issue: 2021-08-13 The technical content of this document is approved under authority of DOA No. EASA.21J.020. EASA DE.21G.0008 EASA.21J.020...
- Page 2 Manual. Please give it your attention, especially the section dealing with Inspections and Checks. Thank you for choosing a MT-Propeller governor, manufactured by AVIA Propeller. Properly maintained it will give you many years of reliable service.
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Page 3: Table Of Contents
ATA 61-08-54 Page 2 Original Issue 2021-08-13 TABLE OF CONTENTS Page Table of Contents (Overview) List of Revisions List of Effective Pages General Model Application Performance Data Design and Operation Information Installation and Operation Instruction Inspections Trouble Shooting Shipping and Storage Governor Installation Record... -
Page 4: List Of Revisions
ATA 61-08-54 Page 3 Original Issue 2021-08-13 LIST OF REVISIONS Rev. No. Date of Issue Page Description Original Issue 2021-08-13 Original Issue... -
Page 5: List Of Effective Pages
ATA 61-08-54 Page 4 Original Issue 2021-08-13 LIST OF EFFECTIVE PAGES Page Date of Issue 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13 2021-08-13... -
Page 6: General
ATA 61-08-54 Page 5 Original Issue 2021-08-13 GENERAL The P-8S( )-( ) hydraulic overspeed propeller governors are single acting governors developed for hydraulically variable pitch propellers to protect propellers against overspeeding. Statement of Purpose This publication provides operation, installation and line maintenance information for the MT- Propeller governors. -
Page 7: Model Application
ATA 61-08-54 Page 6 Original Issue 2021-08-13 MODEL DESIGNATION P - 8 S X - X Legend: Propeller Governor / Overspeed Governor manufactured by AP Overspeed Governor Solenoid valve for resetting, AND 20010 drive pad modified (TP-100) Solenoid valve for resetting, AND 20010 drive pad Solenoid valve for resetting and feathering, AND 20010 drive pad reserved... -
Page 8: Performance Data
ATA 61-08-54 Page 7 Original Issue 2021-08-13 PERFORMANCE DATA Range of acceptable operation temperature from -16°C (+3.2°F) to +150°C(+302°F). The break away torque with engine oil SAE No. 40 at 4.5°C (+40°F) is 40 Nm ( 30 ft lbs) The torque required at 220 psi and 2700 rpm is 0,1 Nm ( 0,8 inch lbs) DIMENSIONS Fig. -
Page 9: Design And Operation Information
ATA 61-08-54 Page 8 Original Issue 2021-08-13 DESIGN AND OPERATION INFORMATION The Avia Propeller aircraft overspeed governors P-8S( )-( ) are base mounted centrifugal overspeed governors for use with single acting constant speed propeller control systems on turboprop engines. The propeller overspeed governor is located on the reduction gearbox. It limits propeller RPM should the primary propeller governor fail. - Page 10 ATA 61-08-54 Page 9 Original Issue 2021-08-13 ON-SPEED If the primary propeller governor is in failure mode or the overspeed governor is in reset condition, the overspeed governor controls the propeller speed, if other circ*mstances (engine power, velocity, …) enable propeller to reach speed setting. In this condition the forces action on the engine-overspeed governor-propeller combination is in a state of balance.
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Page 11: Installation And Operation Instruction
ATA 61-08-54 Page 10 Original Issue 2021-08-13 INSTALLATION AND OPERATION INSTRUCTION a) If applicable: Remove old overspeed governor per aircraft service instructions. Prepare new mounting gasket, P/N B-20024. Coat gasket with engine oil or equivalent before installation. b) Check that mounting studs project a minimum of 31,75 mm (1.250 inch) from face of engine pad. c) Clean engine pad, studs and mounting hardware before installing new mounting gasket. -
Page 12: Inspections
ATA 61-08-54 Page 11 Original Issue 2021-08-13 INSPECTIONS Check for oil leakage. Check oil leakage immediately after engine stop. Check oil leakage at governor’s surface and at mounting pad. If oil leakage is detected, check stop nuts at the governor housing and the mounting nuts. Torque if necessary. -
Page 13: Troubleshooting
ATA 61-08-54 Page 12 Original Issue 2021-08-13 TROUBLESHOOTING Propeller speed is not reduced by pressing TEST button – Possible Causes: a) The solenoid is not energized Check voltage on the connector after pressing the TEST button. If no voltage appears, check aircraft electric circuits. -
Page 14: Shipping And Storage
ATA 61-08-54 Page 13 Original Issue 2021-08-13 SHIPPING AND STORAGE Conservation Inner conservation is automatically done by engine oil. Attach cover cap. After installing the overspeed governor the conservation is done together with engine in accordance with the instruction of the engine manufacturer. Outside conservation isn’t required. -
Page 15: Governor Installation Record
ATA 61-08-54 Page 14 Original Issue 2021-08-13 OVERSPEED GOVERNOR INSTALLATION RECORD Date Authorized Date Notes installed Signature removed... - Page 16 Avia Propeller distributor of the area in which the governor is firstly operated or to MT-Propeller itself within 30 days after date from starting operation. 2) No other warranties and/or guarantees than defined in the actual warranty conditions are made.