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Aircraft Leak Check Training and Inspection Guidelines

Detailed guidelines for conducting leak checks on aircraft engines and components. Training for crew members and students, emphasizing safety precautions during inspections. Includes essential cautions and procedures for identifying and addressing leaks effectively.

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Aircraft Leak Check Training and Inspection Guidelines

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  1. Leak Check Training

  2. Leak Checks Shall Be Conducted • By IP’s prior to the first flight of the day, during crew changes, and while serving as Site Watch • By Solo SNA’s prior to the first leg of each solo flight • With the engine running and the twist grip at flight idle (except on post flight) • During post flight inspections after the engine has been secured.

  3. Amplifying Information • Use a logical flow around the aircraft. • Only cross in front of the aircraft (never behind). • Never place hands inside any compartment . • Don’t use the cowling prop rods to hold cowlings open. • Beware of the blast coming from exhaust stacks and 5th stage bleed air valve. • Ensure any snag hazards (frays in clothing / helmet chords) are secure. • Student solo leak check training shall be conducted by the check pilot prior to the student’s solo flight.

  4. Engine Oil Filter Access Engine Oil Tank CAUTION Beware of the spinning tail rotor drive shaft Don’t try to spin the knurled nut! Engine Oil Filter

  5. Port Rear Fuselage CAUTION Beware of the hot exhaust blast from the exhaust stack Never go behind the horizontal stabilizer

  6. Left Engine Cowling CAUTION Beware of tail rotor driveshaft and air conditioner belt Engine Driven Boost Pump Fuel Nozzle Freewheeling Unit oil lines Turbine Scavenge Lines

  7. Port Transmission Access Transmission Oil Filter Freewheeling Unit return oil line T-fitting

  8. Port Hydraulics Bay Hydraulic Servos

  9. Starboard Hydraulics Bay Hydraulic Power Pack Pressure Switch Hydraulic Filter Servos

  10. Starboard Transmission Access Transmission Chip Detector CAUTION Beware of rotating K-Flex shaft

  11. Starboard Engine Compartment AGB oil lines CAUTION Beware of hot bleed air AGB Chip Detector Free Wheeling Unit Chip Detector Airframe Fuel Filter CAUTION Beware of rotating K-Flex Shaft

  12. Starboard Engine Compartment CAUTION Beware of rotating tail rotor driveshaft and fan belt FCU Generator Garlock seal NOTE Look under The orange hoses. Don’t try to lift them.

  13. Starboard Oil Tank Access Ensure the cap isn’t leaking Do NOT remove the oil cap

  14. Before Reentering the Aircraft • Ensure all cowlings and access panels are secure • If a leak is discovered that could potentially be hazardous or if unsure of the potential hazards caused by any leak, contact a trouble shooter.

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