TROUBLESHOOTING Flashcards
The need for overhaul
EXPERIENCE
It is to return the engine to its former operational capacity, and undo these changes.
PURPOSE OF AN OVERHAUL
Most important changes that makes overhaul necessary
- CRITICAL DIMENSIONS IN THE ENGINE ARE CHANGED AS A RESULT OF WEAR AND STRESS.
- FOREIGN MATERIALS ACCUMULATE IN THE ENGINE.
- METAL IN CRITICAL PARTS IN THE ENGINE BECOMES CRYSTALLIZES. MAKING IT MORE BRITTLE.
- ONE OR MORE PARTS MAY ACTUALLY FAIL.
The recommended overhaul time is determined by the _______________.
MANUFACTURER
Those are required to follow this overhaul recommendation, otherwise they will need to secure an FAA Certificate
OPERATORS OF COMMERCIAL AIRCRAFT
It is the complete reconditioning of only the cylinders, pistons, and valve operating mechanism.
TOP OVERHAUL
It implies an overhaul of those parts on top of the crankcase without fully disassembling the engine.
TOP OVERHAUL
It provide for efficient overhaul operations so that engine overhaul can be accomplished at minimum cost to the aircraft owner, an overhaul shop must be well organized.
OVERHAUL SHOP
It can either be a small shop that handles a few engines at a time, or a large one that handles multiple engines at a time.
OVERHAUL SHOP
Overhaul Process Steps
1.RECEIVING INSPECTION
2.DISASSEMBLY
3.VISUAL INSPECTION
4.CLEANING
5.STRUCTURAL INSPECTION
6.DIMENSIONAL INSPECTION
7.REPAIR AND REPLACEMENT
8.REASSEMBLY
9.INSTALLATION
10.ENGINE RESTING AND RUN-IN
11.PREVENTION AND STORAGE
TOOLS
CYLINDER BASE WRENCH
TORQUE WRENCH
VALVE SPRING COMPRESSOR
MAGNETO TIMING TOOL
Every engine overhaul must be carried out in accordance with the instructions given in the __________________.
MANUFACTURER’S OVERHAUL MANUAL
Each engine manufacturer provides very specific tolerances to which the engine parts must conform and provides general instructions to aid in determining the airworthiness of the part.
ENGINE OVERHAUL
The actual top overhaul consists of ____________________ or ____________________, and ______________________ or _______________________.
RECONDITIONING THE ENGINE’S CYLINDERS BY REPLACING OR RECONDITIONING THE PISTON AND PISTON RINGS
RECONDITIONING OR PLATING THE CYLINDER WALL AND VALVE-OPERATING MECHANISM
It consists of the complete reconditioning of the powerplant.
MAJOR OVERHAUL
It would require that the crankcase be disassembled per the FAA.
RECIPROCATING ENGINE
It consists of determining the general condition of the total engine as received, along with an inventory of the engine’s components.
RECEIVING INSPECTION
It should be organized, and the appropriate manuals obtained and reviewed along with a review of the engine’s history.
OVERHAUL RECORDS
It should be carefully noted on the receiving report.
GENERAL CONDITION OF THE ENGINE
It is essential that every part be accounted for, because an owner may not be aware that certain parts or accessories were removed before the engine was delivered to the overhaul facility.
INVENTORY