CAA NZ AME Piston Engines case studies
CAA NZ AME Piston Engines · Put your knowledge to work in context.
The CAA NZ Aircraft Maintenance Engineer Licence is the New Zealand civil credential that lets a licensed AME certify maintenance on aircraft. The piston engines examination is the module-specific paper for engineers whose rating covers reciprocating powerplants, and it is typically attempted alongside airframe, systems and regulatory modules within a Part 66-style licence structure. The CAA NZ AME Piston Engines case studies are 5 cases and about 3,133 words.
1Turbocharged engine loses manifold pressure at altitude after wastegate maintenance
A six-cylinder turbocharged horizontally opposed engine in a single-engine retractable aircraft has just had its wastegate controller overhauled and refitted during an annual inspection. The aircraft is based at sea level.
690 words, about 3 min2Large magneto drop after 100-hour inspection
A four-cylinder Lycoming O-360 in a training aircraft has just completed a 100-hour inspection. The spark plugs were cleaned, gapped to 0.016-0.019 in, and reinstalled; the magneto-to-engine timing was checked and found correct; the ignition harness was visually inspected.
655 words, about 3 min3Propeller RPM instability after governor replacement
A constant-speed propeller on a six-cylinder fuel-injected engine has just had its propeller governor replaced because of an external oil leak. The replacement governor is the same part number.
633 words, about 3 min4Low differential compression on one cylinder
A six-cylinder Continental IO-520 in a commercial touring aircraft has a differential compression check during a 100-hour inspection. 4 reads 58/80 with air escaping at the exhaust; the other cylinders are 70-74/80.
576 words, about 3 min5Returning a pickled engine to service after long storage
A four-cylinder Lycoming O-320 in a privately owned aircraft has been in an unheated coastal hangar for 22 months. The engine was preserved with an oil-based preservative, desiccant spark plug adapters and a sealed intake and exhaust; the logbook shows the propeller was rotated by hand every 30 days for the first 12 months but not thereafter.
579 words, about 3 min