ATA CHAPTER

ATA Description
74 - 7410 Ignition Power Supply

Ignition

The units and components which generate, control, furnish or distribute an electrical current to ignite thefuel air mixture in cylinders of reciprocating engines or in the combustion chambers or thrust augmentorsof turbine engines.

34 - 3415 High Speed Warning

Navigation

The system components and parts, including the computer which sense, transmit and provide warningwhen operating air speed limits are exceeded. Typical parts are transducer, stall warning detector,switch, vane, horn, lamp, warning unit computer, module, etc.

74 - 7411 Low Tension Coil

Ignition

For reports of magneto coils used on select engines such as the Pratt & Whitney (PWA), Model R2800,to generate a low tension voltage to high tension voltage coil mounted at each engine cylinder. Notgenerally used on modern light aircraft reciprocating engines.

34 - 3416 Altimeter, Barometric/Encoder

Navigation

Altimeters and barometric encoders used to measure and indicate altitude. Also includes the unit whichsenses and alerts to a change in a preselected altitude. Does not include the Ground Proximity Systemsand radio/radar altimeters which are filed in JASC codes 3444. Typical parts are dial, case, pointer,spring, etc.

74 - 7412 Exciter

Ignition

The unit used with turbine engine ignition systems for starting engines. Typical parts are exciter box,bracket, relay. The component make and model should be included.

34 - 3417 Air Data Computer

Navigation

The computer and its integral parts which receives data from various environmental sensing systems,computes this data, and makes it available to the various navigation systems. Does not include externalhardware such as cables, mounting racks, remote switches, etc., which are filed in JASC code 3410.

74 - 7413 Induction Vibrator

Ignition

The unit which provides a high tension spark to reciprocating engine spark plugs for starting.

34 - 3418 Stall Warning System

Navigation

The system components and parts, including the computer which sense, transmit and provide aural,visual and stick shaker warning of an aircraft in an impending flight stall condition. Typical parts aretransducer, stall warning detector, switch, vane, horn, lamp, stick shaker, heater element, warning unitcomputer, module, etc.

74 - 7414 Magneto/Distributor

Ignition

The components which generate and distribute a high voltage to spark plugs in reciprocating engines forfuel/air combustion. Typical parts are coil, breaker points, gear, bearing, contact finger, distributor block,frame, impulse coupling, condenser, rotor, cam, electrode, seal, etc.

34 - 3420 Attitude and Direction Data System

Navigation

The system components and parts which use magnetic, gyroscopic, and inertia forces to indicate anaircraft attitude and direction. Use this code for reports with insufficient information to file in JASC codes3421 through 3425. Includes such items as the inertial reference system (IRS), etc