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Title:

EXHAUST SYSTEM

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... UP EXHAUST PIPE TO CHECK CONDITION OF INTERNAL PARTS (BAFFLES) IN HEAT EXCHANGER. IF BAFFLE IS WAVY, DISTORTED, OR ERODED, IT REQUIRES REPAIR ... – PowerPoint PPT presentation

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Title: EXHAUST SYSTEM


1
EXHAUST SYSTEM
  • (FROM AOPA PILOT MARCH 2001)
  • 20 OF POWER LOSSES OR PARTIAL POWER FAILURE DUE
    TO BAD EXHAUST BAFFLES
  • RASH OF FATAL ACCIDENTS IN 1995 AND 1996 TRACED
    TO INADEQUATE EXHAUST SYTEM MAINTENANCE AND
    INSPECTION

2
EXHAUST SYSTEM
  • 321 STAINLESS STEEL (CHROMIUM-NICKEL STEEL) USED
    ON MOST GA AIRCRAFT (NON-TURBOCHARGED ENGINES)
  • GOOD STRENGTH AND PERFORMANCE FROM 800 DEGREES TO
    1600 DEGREES F

3
EXHAUST SYSTEM
  • EASY TO INSPECT
  • LONG-TERM EXPOSURE TO EXHAUST GASES CHANGES METAL
    STRUCTURE
  • WORN-OUT PIPE CHARACTERIZED BY BLUISH-BLACK
    COLOR APPEARANCE OF SMALL ERUPTIONS ON SURFACE
  • SEVERELY WORN PIPES LOOK LUMPY AND SAGGY DUE TO
    METAL FLOWING AS IT LOSES STRENGTH

4
EXHAUST SYSTEM
  • SHINE FLASHLIGHT UP EXHAUST PIPE TO CHECK
    CONDITION OF INTERNAL PARTS (BAFFLES) IN HEAT
    EXCHANGER
  • IF BAFFLE IS WAVY, DISTORTED, OR ERODED, IT
    REQUIRES REPAIR
  • BAFFLE MATERIAL CAN BREAK OFF AND BLOCK EXIT PIPE
  • AC 91.59 CITES 20 OF PARTIAL POWER FAILURES DUE
    TO BAFFLE FAILURES

5
EXHAUST SYSTEM
  • INSPECT OUTER COWL FOR EVIDENCE OF EXHAUST
    LEAKAGE (1 EXHAUST SYSTEM PROBLEM)
  • GRAYISH OR BROWNISH TRAILS STREAMING AFT SIGNAL
    LEAK
  • GAS IS HOT AND CORROSIVE AND QUICKLY ERODES
    ALUMINUM FLANGES OF CYLINDER HEAD

6
EXHAUST SYSTEM
  • UNLIKE OTHER CRITICAL AIRPLANE SYSTEMS, THERE IS
    NO REDUNDANCY WHERE YOUR EXHAUST SYSTEM IS
    CONCERNED
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