GROUP E – PROPELLER ATA-chapter 61 / PROPELLER

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GROUP E – PROPELLER ATA-chapter 61 / PROPELLER TRAINING USE ONLYDA 40 Series (Austro Engine) PropellerGROUP E – PROPELLER ATA-chapter 61 / PROPELLER TRAINING USE ONLYDA 40 Series (Austro Engine) Propeller E-01 Issue: July

ATA 61 – PROPELLER Propeller General This chapter tells you about the propeller installed on theATA 61 – PROPELLER Propeller General This chapter tells you about the propeller installed on the DA 40 NG. Refer to AMM Section 61 -10 for data about the propeller and refer to AMM Section 61 -20 for data about the propeller control. If OÄM 40 -314 is carried out, a gearbox fan with an additional alternator pulley is installed on the gearbox flange. For more data on the propeller refer to the propeller manufacturers’ manuals. Note: Equipment which is certified for installation in the DA 40 NG is listed in Section 6. 5 of the airplane Flight Manual. Such equipment may be installed in accordance with the Airplane Maintenance Manual. Any equipment which is not listed in Section 6. 5 of the Airplane Flight Manual is called “Additional Equipment”. The installation of Additional Equipment is a modification which must be handled in accordance with national regulations or a Service Bulletin. TRAINING USE ONLY Propeller E-02 DA 40 Series (Austro Engine) Issue: July

ATA 61 – PROPELLER Propeller Assembly General The DA 40 NG has a MTV-6 -R/190 -69ATA 61 – PROPELLER Propeller Assembly General The DA 40 NG has a MTV-6 -R/190 -69 variable pitch propeller installed. The propeller has three blades. The blades are made from wood and are covered with GFRP. The blades have an acrylic lacquer painted finish. The outboard leading-edges of the blades are protected from erosion by a stainless-steel sheath. The stainless-steel sheath is bonded into position. The inboard section of the leading-edge is protected by a self-adhesive rubber strip (PU tape). This Section describes how to remove and install the propeller and how to do a propeller blade tracking test. Refer to the propeller and governor manufacturer manuals for more data. Description The propeller hub has six studs on the rear face. The propeller attaches to the engine gearbox flange with six nuts and washers. If OÄM 40 -314 is carried out, an additional alternator gearbox fan with an additional alternator pulley is installed on the gearbox flange using a prop flange pulley support. The six propeller attachment nuts mount the gearbox fan assy and the propeller to the gearbox flange. A spinner bulkhead (spinner backplate) attaches to the rear of the hub with six bolts. The bolts are secured with lock-wire. A front support plate attaches to the front of the hub with six screws. The screws are also secured with lock-wire. The spinner dome which is made from composite material attaches to the front/aft bulkhead with screws. When the engine is running, aerodynamic as well as spring forces push the propeller blades towards fine pitch. The engine has an electronic engine control system EECS which includes an electronic engine control unit (EECU). The EECU controls the propeller pitch via the governor hydraulically. Gearbox oil flows through the constant speed governor and controls the oil pressure in the propeller pitch change mechanism. The oil pressure is increased to obtain propeller blade pitch increase and reduced to lower the blade pitch angles. The oil to govern the propeller blade pitch flows through the hollow propeller and gearbox hub. TRAINING USE ONLY Propeller E-03 DA 40 Series (Austro Engine) Issue: July

ATA 61 – PROPELLER Operation When the propeller is turning aerodynamic and spring forces cause theATA 61 – PROPELLER Operation When the propeller is turning aerodynamic and spring forces cause the blades to turn towards fine pitch. High pressure oil is used to move the propeller blades to high pitch. Oil from the engine gearbox is pumped to the governor. The governor directs the oil to the propeller as necessary to control the propeller pitch. The propeller pitch control system is integrated into the engine EECS system. The pitch is controlled automatically by the EECU. Depending on the power setting the propeller pitch is adjusted such that the required RPM will be obtained. An adjustable pitch stop limits the amount of blade movement towards coarse pitch. If the oil pressure fails during normal flight aerodynamic propeller blade forces and spring forces of the propeller pitch change mechanism pushes the blades into fine pitch. TRAINING USE ONLY Propeller E-04 DA 40 Series (Austro Engine) Issue: July

ATA 61 – PROPELLER TRAINING USE ONLY Propeller E-05 DA 40 Series (Austro Engine) Issue: JulyATA 61 – PROPELLER TRAINING USE ONLY Propeller E-05 DA 40 Series (Austro Engine) Issue: July

ATA 61 – PROPELLER Propeller Control General The DA 40 NG has a MTV-6 -R/190 -69ATA 61 – PROPELLER Propeller Control General The DA 40 NG has a MTV-6 -R/190 -69 variable pitch propeller with an engine mounted constant speed governor P-853 -16. The constant speed governor is controlled by the engine EECS system. The constant speed governor controls the propeller blade angle (pitch). For further information about the constant speed governor unit refer to mt-Propeller Operation and Installation Manual, latest revision. Description and Operation The DA 40 NG has a MTV-6 -R/190 -69 variable pitch propeller. When the propeller is rotating the aerodynamic and spring forces causes the blades to move towards fine pitch. The propeller uses oil pressure to increase the blade angle (pitch). The constant speed governor is controlled by the engine control units (EECUs). The pilot has only one lever to control the engine performance. The propeller blade angle is adjusted automatically based on power lever position. As with other constant speed propeller control systems, the EECU senses engine performance and sets the governor to regulate oil pressure to the propeller to change blade angle as required. Depending on the power setting the propeller pitch is adjusted such that the required RPM will be obtained. The oil pressure at the governor is approximate 7 bar (100 PSI). If the engine speed is too high, the constant speed governor operates the pilot valve such that the oil flows in the propeller hub which increases the propeller pitch and reduces the RPM. If the engine speed is too low, the governor releases oil flow out of the propeller hub. The piston moves aft to reduce the blade angle which will increase engine RPM. During normal operation a preset coarse-pitch-stop prevents the propeller blades from moving past a preset maximum blade angle. If the engine fails in flight, or if the propeller oil supply fails in flight, aerodynamic and spring forces will reduce the blade pitch angle which keeps the propeller rotating. For further information of the governor’s working principles refer to the mt-Propeller Operation and Installation Manual, latest revision. WARNING: Make sure that the engine is safe before you do any work on the propeller. If the engine is turned, the propeller can cause injury or death. TRAINING USE ONLY Propeller E-06 DA 40 Series (Austro Engine) Issue: July

ATA 61 – PROPELLER TRAINING USE ONLY Propeller E-07 DA 40 Series (Austro Engine) Issue: JulyATA 61 – PROPELLER TRAINING USE ONLY Propeller E-07 DA 40 Series (Austro Engine) Issue: July

ATA 61 – PROPELLER TRAINING USE ONLY Propeller E-08 DA 40 Series (Austro Engine) LEFT BLANKATA 61 – PROPELLER TRAINING USE ONLY Propeller E-08 DA 40 Series (Austro Engine) LEFT BLANK Issue: July