ATPL Aircraft General Knowledge case studies
ATPL Aircraft General Knowledge · Put your knowledge to work in context.
Aircraft General Knowledge (AGK) is one of the fourteen theoretical knowledge subjects a candidate must pass before taking the EASA Airline Transport Pilot Licence (ATPL) or Commercial Pilot Licence (CPL) skill test. It is also examined, with national variations, by other authorities such as the UK CAA. The ATPL Aircraft General Knowledge case studies are 5 cases and about 1,941 words.
1Hydraulic Pressure Fluctuation with a Foamy Reservoir
After a 12-minute climb in a twin-engine business jet, the Green hydraulic system pressure begins fluctuating between 2,100 and 2,900 psi. The Green reservoir sight glass is full of foam, although the quantity gauge still indicates 7.8 L out of 8.0 L.
406 words, about 2 min2Cabin Altitude Climb After One Pack Trips
At FL250 in a pressurised twin turboprop, the cabin altitude is 8,000 ft and rising at 350 ft/min. The left engine bleed pressure is low and the left pack valve has closed automatically.
425 words, about 2 min3Residual Ice and Increasing Nose-Up Trim
During cruise at FL190 in a turboprop, OAT is -6°C and you are in visible moisture. The airframe ice-protection system uses pneumatic boots on the wing and tail leading edges, electrically heated propellers and heated pitot/static.
391 words, about 2 min4Battery Discharge with One Generator Online
On a twin turboprop with two 28 V, 200 A starter-generators and a 24 V, 35 Ah NiCd battery, generator 1 trips shortly after takeoff. Generator 2 picks up the load, but the loadmeter reads 185 A and the battery ammeter shows 10 A discharge.
363 words, about 2 min5Propeller Overspeed at Cruise Climb
During climb at FL240, the left propeller RPM rises from 100% to 106% while torque falls from 90% to 68%. ITT and Ng remain normal, oil pressure is normal, and there is no vibration.
356 words, about 2 min