r22_mm_4

Prévia do material em texto

CHAPTER 4
AIRFRAME
Section Title Page
4.000 Airframe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
4.001 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
4.002 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
4.100 Fuselage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
4.110 Cabin Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1
4.120 Windshield Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2
4.121 Windshield Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2
4.122 Windshield Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2
4.123 Windshield Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3
4.130 Door Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4
4.140 Fairing, Cowling and Inspection Panels . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4
4.141 Side Skirts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4
4.142 Mast Fairing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6
4.143 Aft Cowling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6
4.144 Cabin Inspection Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6
4.200 Welded Steel Tube Frame Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7
4.210 Left-Hand Frame Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.8
4.211 Left-Hand Frame Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.8
4.212 Left-Hand Frame Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.8
4.220 Right-Hand Frame Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.9
4.221 Right-Hand Frame Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.9
4.222 Right-Hand Frame Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.12
4.230 Upper Frame Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.13
4.231 Upper Frame Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.13
4.232 Upper Frame Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.14
4.240 Strut Assembly Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . 4.15
4.300 Tailcone And Empennage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.16
4.310 Tailcone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.16
4.311 Tailcone Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.16
4.312 Tailcone Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.16
4.313 Tailcone Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.17
4.314 Tailcone Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.22
4.320 Empennage Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.22
4.321 Empennage Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.22
OCT 2014 Chapter 4 Airframe Page 4.i
Page 4.ii Chapter 4 Airframe OCT 2014
CHAPTER 4
AIRFRAME (Continued)
Section Title Page
4.322 Empennage Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.23
4.323 Upper Stabilizer Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.23
4.324 Lower Stabilizer Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.23
4.325 Horizontal Stabilizer Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.24
CHAPTER 4
AIRFRAME
4.000 Airframe
4.001 Introduction
This section contains procedures for removal and installation of the cabin components, 
steel tube structures, tailcone and empennage.
4.002 Description
The R22 is a two-place, single main rotor, single engine helicopter constructed primarily 
of metal and equipped with skid-type landing gear.
The primary fuselage structure is welded steel tubing and riveted aluminum sheet. The 
tailcone is a monocoque structure in which aluminum skins carry primary loads. Fiberglass 
and thermoplastics are used in the secondary cabin structure, engine cooling shrouds, 
and various other ducts and fairings. The cabin doors are also constructed of fiberglass 
and thermoplastics.
A right-side cowl door provides access to the main gearbox and drive system. Additional 
access to controls and other components for maintenance is provided by removable 
panels and cowlings.
Stainless steel firewalls are located forward of and above the engine.
Both cabin doors may be removed and installed by maintenance personnel or pilots. To 
remove a door, remove cotter pins in upper and lower hinges, then open and lift door off. 
To install doors, use reverse procedure. Adjust weight and balance as required when 
removing and installing doors.
4.100 Fuselage
4.110 Cabin Assembly
The cabin assembly is a non-field replaceable assembly.
OCT 2014 Chapter 4 Airframe Page 4.1
Page 4.2 Chapter 4 Airframe OCT 2014
4.120 Windshield Assembly
The windshield is made of transparent plexiglass set in a weather-tight silicone sealer and 
is screwed to the cabin structure.
4.121 Windshield Removal
a. Remove door and hinges.
NOTE
To prevent scratches in the windshield, a protective cover 
should be taped to the inside and outside of the windshield 
prior to removal.
b. Remove screws and side retainer holding windshield.
c. Reinstall hinges and doors for cabin structure support with window removed.
d. Remove screws and retainers (upper, lower and middle) holding windshield.
e. Clean silicone sealant off retainers.
f. Clean silicone sealant off windshield for re-installation.
4.122 Windshield Installation
a. Remove all old sealant on cabin, retainers and windshield.
b. Tape edge of windshield with 3/4” polyvinyl chloride tape.
c. Install windshield and cleco retainer strips.
d. Mask windshield along edge of retainer strips with 1/2” masking tape. This will 
catch silicone gel squeeze-out on installation of retainer strips.
e. Remove the retainer strips.
f. To ensure a proper seal, run a bead of B270-13 silicone gel along entire edge of 
tape line.
g. Holding windshield in place, cleco retainer strips (center, upper and lower) onto 
windshield.
	Chapter 4 - Airframe
	4.000 Airframe
	4.001 Introduction
	4.002 Description
	4.100 Fuselage
	4.110 Cabin Assembly
	4.120 Windshield Assembly
	4.121 Windshield Removal
	4.122 Windshield Installation
	4.123 Windshield Replacement
	4.130 Door Removal and Installation
	4.140 Fairing, Cowling and Inspection Panels
	4.141 Side Skirts
	4.142 Mast Fairing
	4.143 Aft Cowling 
	4.144 Cabin Inspection Panels
	4.200 Welded Steel Tube Frame Assemblies
	4.210 Left-Hand Frame Assembly
	4.211 Left-Hand Frame Removal 
	4.212 Left-Hand Frame Installation
	4.220 Right-Hand Frame Assembly
	4.221 Right-Hand Frame Removal 
	4.222 Right-Hand Frame Installation
	4.230 Upper Frame Assembly
	4.231 Upper Frame Removal
	4.232 Upper Frame Installation 
	4.240 Strut Assembly Removal and Installation
	4.300 Tailcone and Empennage
	4.310 Tailcone
	4.311 Tailcone Removal
	4.312 Tailcone Installation
	4.313 Tailcone Replacement
	4.314 Tailcone Repair
	4.320 Empennage Assembly
	4.321 Empennage Removal
	4.322 Empennage Installation
	4.323 Upper Stabilizer Replacement4.324 Lower Stabilizer Replacement
	4.325 Horizontal Stabilizer Replacement