FAA Aviation Mechanic - Powerplant (AMP) case studies
FAA Aviation Mechanic - Powerplant (AMP) · Put your knowledge to work in context.
The Aviation Mechanic Powerplant certificate is the rating that allows a certificated mechanic to maintain, repair, and inspect aircraft engines and their related systems. It is one of the three ratings - General, Airframe, and Powerplant - that together qualify a mechanic to approve an aircraft or component for return to service within the limits of the certificate held. The FAA Aviation Mechanic - Powerplant (AMP) case studies are 5 cases and about 3,826 words.
1Low Compression and a Cool Cylinder on a Fuel-Injected Flat Six
A six-cylinder, horizontally opposed, fuel-injected engine in a Part 91 single has 1,180 hours since major overhaul. The owner reports a light roughness at cruise and about 2 gallons per hour more fuel burn than usual.
739 words, about 4 min2Rising ITT on a Free-Turbine Turboprop at Constant Torque
A turboprop powered by a free-turbine engine with a reverse-flow annular combustor has 900 hours since its last hot-section inspection. The operator's trend sheet shows that to reach the same takeoff torque as 200 hours ago, interstage turbine temperature is now about 25 °C higher at the same outside air temperature and pressure altitude.
784 words, about 4 min3Fluctuating Oil Pressure After a Remote Oil Change
A six-cylinder, air-cooled, fuel-injected engine with a wet sump was serviced at a remote field. On the return leg the pilot reports oil pressure fluctuating about ±10 psi at cruise, where it has always been a steady 75 psi, and dropping toward 50 psi in a sustained climb.
776 words, about 4 min4Two Indication Problems on the Same Airplane
A twin with fuel-injected engines came out of a shop after replacement of the left engine's #3 cylinder. On the first flight the pilot reports that #3 exhaust gas temperature reads about 80 °F below its stable historical value at the same power setting and fuel flow, while the other five cylinders are unchanged.
764 words, about 4 min5Propeller Overspeed and Hunt After Cable Replacement
A single-engine airplane with a three-blade constant-speed propeller and an engine-driven governor had the governor control cable replaced at the last annual, 20 hours ago. On takeoff, if the throttle is advanced briskly, RPM overshoots to about 2,780 before settling at 2,700, which is redline.
763 words, about 4 min