Exhibit 21.1

SUBSIDIARIES

The subsidiaries of the Company as of
October 30, 2009, are as follows:



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

The above list excludes certain subsidiaries that, considered in the aggregate as a single
subsidiary, would not constitute a significant subsidiary as of October 30, 2009.