4.
Drill nearly through the head of the rivet, using a drill the same size as the rivet shank. (See View 4)
5.
Break off rivet head, using a drift pin as a pry. (See View 5)
6.
Drive out the remaining rivet shank with a pin having a diameter equal to the rivet shank. (See View 6)
20-00-00 Page 20-7 Revised: February 28, 2002
CHART 2001. MAXIMUM DISTANCE BETWEEN SUPPORTS FOR FLUID TUBING
DISTANCE BETWEEN SUPPORTS (IN.)
TUBE O.D. (IN.) ALUMINUM ALLOY STEEL
1/8 3/16 1/4 5/16 3/8 1/2 5/8 3/4 1 9 1/2 12 13 1/2 15 16 1/2 19 22 24 26 1/2 11-12 14 16 18 20 23 25 1/2 27 1/2 30
IDENTIFICATION OF FLUID LINES. (Refer to Figure 20-4)
Fluid lines in aircraft are often identified by markers made up of color codes, words, and geometric symbols. These markers identify each line's function, content, and primary hazard, as well as the direction of fluid flow.
In most instances, fluid lines are marked with l-inch tape or decals. Paint is used on lines in engine compartments, where there is the possibility of tapes, decals or tags being drawn into the engine induction system.
In addition to the above mentioned markings, certain lines may be further identified as to specific function within a system, for example: DRAIN, VENT, PRESSURE or RETURN.
Lines conveying fuel may be marked FLAM (Flamable); lines containing toxic materials are marked TOXIC in place of FLAM. Lines marked PHDAN contain physically dangerous materials: such as oxygen, nitrogen and freon.
The aircraft and engine manufacturers are responsible for the original installation of identification markers, but the aviation mechanic is responsible for their replacement when it becomes necessary.
Generally, tapes and decals are placed on both ends of a line and at least once in each compartment through which the line runs. In addition, identification markers are placed immediately adjacent to each valve, regulator, filter or other accessory within a line. Where paint or tags are used, location requirements are the same as for tapes and decals.
20-00-00 Page 20-8 Revised: February 28, 2002
1G20
Figure 20-4. Identification of Aircraft Fluid Lines
20-00-00
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Revised: February 28, 2002
1G21
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20-00-00 Page 20-10 Revised: February 28, 2002
1G22
CHAPTER
21
ENVIRONMENTAL SYSTEMS
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CHAPTER 21 - ENVIRONMENTAL SYSTEMS
TABLE OF CONTENTS / EFFECTIVITY
CHAPTER/ SECTION SUBJECT GRID NO. EFFECTIVITY
21-00-00 GENERAL 1H5
Description and Principles of Operation Troubleshooting 1H5 1H5
21-20-00 DISTRIBUTION 1H9
Cabin Vent System Overhead Vent Blower Removing Blower Assembly Dismantling Blower Assembly Rebuilding Blower Assembly Installing Blower Assembly 1H9 1H9 1H9 1H10 1H10 1H10
21-40-00 HEATING 1H11
Heater System - Operational Test 1H11
Description of Heater and Basic Components 1H12
Spark-Spray Ignition Fuel Regulator and Shutoff Valve Duct Switch Combustion Air Blower Ventilating Air Blower Operating Controls Operating Procedure 1H12 1H15 1H15 1H15 1H15 1H17 1H17
Maintenance Service 1H18
Inspection of Heater and Heater Components Preflight and/or Daily Inspection 100 Hour Inspection Removal of Heater Installation of Heater Heater Electrical System Checks Electrical Checks Vent Blower Power Circuit Check Heater Power Circuit Check 1H18 1H18 1H19 1H19 1H20 1H21 1H21 1H23 1H24
21-Cont./Effec. Page 21-3 Revised: February 28, 2002
CHAPTER 21 - ENVIRONMENTAL SYSTEMS
TABLE OF CONTENTS / EFFECTIVITY
CHAPTER/ GRID SECTION SUBJECT NO. EFFECTIVITY
21-40-00 HEATING (cont)
General Maintenance 1H24
Combustion Air Blower 1H24 Spark Plug 1I2 Ignition Unit 1I4 Ignition Unit Removal and Installation 1I4 Testing Ignition Unit 1I5 Operational Test of Ignition Unit 1I5 Vibrator 1I6 Vibrator Removal and Installation 1I6 Inspection of Ignition Unit 1I7 Cycling Switch and Limit (Overheat) Switch 1I7 Combustion Air Pressure Switch 1I8 Fuel Regulator and Shutoff Valve 1I8 Removal of Fuel Regulator 1I8 Adjustment of Fuel Regulator 1I8 Installation of Fuel Regulator 1I9 Heater Fuel Pump 1I9 Removal of Heater Fuel Pump 1I9 Disassembly of Pump 1I10 Cleaning of Pump 1I10 Inspection and Repair of Pump 1I11 Assembly of Pump 1I11 Installation of Heater Fuel Pump 1I11 Duct Switch 1I11
Overhaul Instructions 1I12 1R0202
Disassembly of Heater 1I12 Disassembly of Combustion Air Blower Assembly 1I13 Cleaning of Heating Components 1I13 Cleaning and Inspecting the Combustion Tube Assy 1I15 Inspection of Remaining Components 1I16
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