AirComm Corporation Bell 429 Heating System 429H201M1 Rev3 User Manual

HEATER SERVICE MANUAL 429H-201M-1 
Revision 2    Page 3-13 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 3.11 Heater Control Panel 
(Aircraft right looking inboard) 
  

HEATER SERVICE MANUAL 429H-201M-1 
Revision 2    Page 3-13 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
Figure 3.12 Heater System Electrical Schematic  

HEATER SERVICE MANUAL 429H-201M-1 
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HEATER SERVICE MANUAL 429H-201M-1 
Revision 2    Page 3-15 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Heater System Control Valve Body 
(View looking aft) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Heater System Control Valve Controls 
(View looking down) 
   
 
 
 
 
 
 
 
 
           
 
Figure 3.13 Heater System Control Valve  

HEATER SERVICE MANUAL 429H-201M-1 
Revision 0    Page 4-1 
 
 
CHAPTER 4 
PLACARDS AND MARKINGS 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
Figure 4.1 Placards and Markings 
 
 
 
 
 
 
 
429H-6620-33 
ES39300-14 ES39300-12  

HEATER SERVICE MANUAL 429H-201M-1 
Revision 2    Page 5-1 
 
            
 
CHAPTER 5 
SERVICING 
 
1. SERVICING INFORMATION 
 
No servicing required for the continued airworthiness of the 429 Heater System. 
 
 
 
 
 
2.  SUGGESTED SPARES LIST 
 
Item 
Description Part No. 
1  Heater Shut Off Valve  ES26192-1 
2  Cockpit Heater Ejector  429H-6602-4 
3  Cabin Heater Ejector Assy. FWD  429H-6610-1   Left Side 
429H-6610-2    Right Side 
4  Cabin Heater Ejector Assy. AFT  429H-6608-1    Right Side...

HEATER SERVICE MANUAL 429H-201M-1 
Revision 3    Page 6-1 
 
 
CHAPTER 6 
STANDARD PRACTICES INFORMATION 
 
 
1.  B-NUT / FITTING SAFETY WIRE PROCEDURE 
 
A.  Use MS20995C-32 per QQ-W-423B Cond A Safety wire (or Equivalent) to secure all B-nut / 
Fittings in the heater bleed air system. 
 
i. Cut safety wire with excess length. 
 
ii. Thread through safety wire hole in B-nut (or fitting). 
 
iii. Pull ends even. Twist safety wire to ensure a tight fit against the safety wire hole on the B-
nut (or...

HEATER SERVICE MANUAL 429H-201M-1 
Revision 3    Page 6-4 
 
CHAPTER 6 
STANDARD PRACTICES INFORMATION (cont’d) 
 
3.  REMOVAL INSTALLATION / REPLACEMENT OF THE HEATER SHUTOFF VALVE (see 
figure 3.3). 
 
REMOVAL 
A.  Gain access to the Main Rotor Transmission Cowling. 
 
B.  Disconnect the bleed air plumbing from the Shutoff Valve. 
 
C.  Disconnect the electrical connection to the valve. 
 
D.  Remove the two MS27039C-1-15 mounting screws and remove the heater shutoff valve 
from the aircraft....

HEATER SERVICE MANUAL 429H-201M-1 
Revision 3    Page 6-4 
 
CHAPTER 6 
STANDARD PRACTICES INFORMATION (cont’d) 
 
5.  REMOVAL INSTALLATION /  REPLACEMENT OF THE HEATER THERMAL SNAP 
SWITCHES 
 
REMOVAL 
 
A.  Remove NAS1802-3-7 Bolt, MS21043-3 Nut, NAS1149CO316R Washer (qty 2) and 
MS21919WCH2 clamp.   
 
B.  Remove M81824/1-1(qty 2) environmental splice. 
 
C.   Remove S-8016EC-1 Thermal Snap Switch 
 
 
 
  INSTALLATION / REPLACEMENT 
 
NOTE 
Maintain a minimum clearance of 0.8 inches between Snap...

HEATER SERVICE MANUAL 429H-201M-1 
Revision 3    Page 6-4 
 CHAPTER 6 
STANDARD PRACTICES INFORMATION (cont’d) 
 
  INSTALLATION / REPLACEMENT 
 
NOTE 
Always use a back-up wrench to hold the union, bulkhead fitting, or component that the Bleed 
Air Plumbing is being connected to. 
 
 
A.  Align connection and thread B-Nut until metal on metal contact is felt.  Continue to tighten 
an additional 60 degrees of rotation and safety wire per step 1. 
 
B.  After completion of Bleed Air Plumbing installation,...