Exhibit 21.1

SUBSIDIARIES

The subsidiaries of the Company as of October 31, 2008 are as follows:



|                                          |  |                             
|----------------------------------------- |  | ----------------------------
|Name of Subsidiary                        |  | Jurisdiction ofIncorporation
|                                          | 
|Advanced Input Devices, Inc.              |  | Delaware                    
|Memtron Technologies Co.                  |  | Delaware                    
|LRE Medical GmbH                          |  | Germany                     
|Esterline Input Devices (Shanghai) Ltd.   |  | China                       
|                                          | 
|Armtec Defense Products Co.               |  | Delaware                    
|Armtec Countermeasures Co.                |  | Delaware                    
|Armtec Countermeasures TNO Co.            |  | Delaware                    
|Wallop Defence Systems                    |  | England                     
|                                          | 
|Auxitrol Technologies S.A.                |  | France                      
|Auxitrol S.A.                             |  | France                      
|Esterline Sensors Services Americas, Inc. |  | Delaware                    
|                                          | 
|CMC Electronics Incorporated              |  | Canada                      
|CMC Electronics Aurora Incorporated       |  | Delaware                    
|                                          | 
|Darchem Engineering Ltd.                  |  | Scotland                    
|                                          | 
|Hytek Finishes Co.                        |  | Delaware                    
|                                          | 
|Kirkhill  TA Co.                         |  | California                  
|                                          | 
|Korry Electronics Co.                     |  | Delaware                    
|AVISTA Incorporated                       |  | Wisconsin                   
|Palomar Products, Inc.                    |  | Delaware                    
|                                          | 
|Leach International Corporation           |  | Delaware                    
|                                          | 
|Leach International Europe S.A.           |  | France                      
|                                          | 
|Mason Electric Co.                        |  | Delaware                    
|BVR Technologies Co.                      |  | Delaware                    
|                                          | 
|Muirhead Aerospace Limited                |  | England                     
|Traxsys Input Products Ltd.               |  | England                     
|                                          | 
|Pressure Systems, Inc.                    |  | Virginia                    
|                                          | 
|Weston Aerospace Ltd.                     |  | England                     
|Norwich Aero Products Ltd.                |  | New York                    

The above list excludes certain subsidiaries that, considered in the aggregate as a single subsidiary, would not
constitute a significant subsidiary as of October 31, 2008.