Aviation Mechanic - General, Airframe, and Powerplant › III. Powerplant › Task L. Engine Exhaust and Reverser Systems

AM.III.L.S4

Skill

Inspect exhaust system internal baffles or diffusers.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - Powerplant p. 3-17
Chapter 3: Induction & Exhaust Systems › Turbine Engine Inlet Systems › Variable-Geometry Duct
accomplish this, inlet ducts are designed to function as diffusers, decreasing the velocity and increasing the static pressure of the air passing through them. [Figure 3-26] As with military supersonic aircraft, a diffuser progressively decreases in area ... section of the duct then increases in area, since this part must act as a subsonic diffuser. [Figure 3-27] In practice, inlet ducts for supersonic aircraft follows this general design only as much as practical, depending upon the design…
Aviation Maintenance Technician Handbook - Powerplant p. 1-38
Chapter 1: Aircraft Engines › Compressor Types › Centrifugal-Flow Compressors
Centrifugal-Flow Compressors The centrifugal-flow compressor consists of an impeller (rotor), a diffuser (stator), and a compressor manifold. [Figure 1-46] Centrifugal compressors have a high pressure rise per stage that can be around 8:1. Generally centrifugal compressors ... limited to two stages due to efficiency concerns. The two main functional elements are the impeller and the diffuser. Although the diffuser is a separate unit and is placed inside and bolted to the manifold, the entire assembly (diffuser…
Aviation Maintenance Technician Handbook - Powerplant p. 3-23
Chapter 3: Induction & Exhaust Systems › Reciprocating Engine Exhaust Systems › Reciprocating Engine Exhaust System Maintenance Practices
inspection of an exhaust system, close attention should be given to all external surfaces of the exhaust system for cracks, dents, or missing parts. This also applies to welds, clamps, supports, support attachment lugs, bracing, slip ... probing suspected areas. The system should be disassembled as necessary to inspect internal baffles or diffusers. If a component of the exhaust system is inaccessible for a thorough visual inspection or is hidden by nonremovable parts…
Aviation Maintenance Technician Handbook - Powerplant p. 11-11
Chapter 11: Light-Sport Aircraft Engines › Opposed Light-Sport, Experimental, & Certificated Engines › Jabiru Light-Sport Engines
cooled, aircraft engines. The fact that these baffles and plenum chamber are not required also ensures a cleaner engine installation, which in turn facilitates maintenance and inspection of the engine and engine components. The engine is fitted with ... very effective starting. The engine has very low vibration level; however, it is also supported by four large rubber shock mounts attached to the engine mounts at the rear of the engine. The fuel induction system uses a pressure…
Aviation Maintenance Technician Handbook - Airframe p. 2-63
Chapter 2: Aerodynamics, Aircraft Assembly, & Rigging › Annual & 100-Hour Inspections › Preparation
seats and seat belts for defects and TSO tags; windows and windshields…