Patent Publication Number: US-2022228955-A1

Title: Remote Air Collection

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the benefit of U.S. Provisional Patent Application Ser. No. 63/140,105, filed Jan. 21, 2021, and entitled “Remote Air Collection;” which is incorporated herein by reference in its entirety. 
    
    
     BACKGROUND INFORMATION 
     1. Field 
     The present disclosure relates generally to aircraft and, in particular, to collecting air samples from remote locations in the aircraft. 
     2. Background 
     Air can be sampled in an aircraft for a number of different reasons. For example, air sampling can be used in designing and testing aircraft. For example, with respect to moisture control in an aircraft, airflow can occur in cavities between insulation blankets and the skin on a fuselage of the aircraft. This airflow can occur in locations where frost, condensation, or both can form during flight of the aircraft. The airflow can cause undesired movement of moisture. For example, the condensation of moisture in an undesired location can cause an entry of water into a passenger cabin. The aircraft can be designed to control airflow such that the moisture is moved to drainage collectors to reduce the moisture that may result in water causing undesired conditions in the aircraft 
     Air sampling can be used as part of the design and testing process to detect the airflow. This air sampling includes injecting a gas into the cavities of the aircraft where moisture control is desired. For example, a gas, such as xenon, can be injected into a location in cavities between the insulation blankets and the skin. 
     Air samples can be collected from different locations in the cavities and analyzed to determine whether the injected gas is present at those locations. Detection of the gas in these different locations in the cavities is used to analyze the airflow. This analysis can be made to determine whether adequate moisture control is present or to make changes in the design of the aircraft to obtain desired moisture control in these cavities. 
     As another example, sampling of air can be performed to determine air quality in an aircraft. Samples of air can be collected from various locations such as in a passenger cabin, cargo areas, or other locations within the aircraft. These air samples can be analyzed to determine the air quality during operation of aircraft. 
     For example, the air samples can be collected during the flight of the aircraft to identify air quality issues such as odors or the presence of undesired gases during the flight of the aircraft. Real-time monitoring can be performed to identify air quality issues in a manner that enables resolution of these air quality issues. 
     For example, identification of an odor from melting polystyrene foam or a burnt smell from overheating food in a microwave can be detected through sampling and analyzing air samples from different locations in real-time. In this example, the detection of an odor in a galley can enable a flight attendant or other cabin crew member to resolve the issue. 
     Collection of the air samples from different locations in the aircraft can be performed by moving portable gas analysis to different locations or by installing a network of conduits through which gas samples can be obtained for analysis. These types of sampling techniques can be more difficult to use or implement than desired. For example, currently, air samples to be collected and tested must be within 3 feet of portable testing apparatus such as the gas chromatography mass spectrometer (GS-MS) apparatus. 
     Therefore, it would be desirable to have a method and apparatus that take into account at least some of the issues discussed above, as well as other possible issues. For example, it would be desirable to have a method and apparatus that overcome a technical problem with collecting air samples from different locations in an aircraft without having to be in close proximity to the air sample. 
     SUMMARY 
     An embodiment of the present disclosure provides an air monitoring system comprising an air interface, a first seal mechanism connected to the input port, and a second seal mechanism connected to the sampling port. The air interface comprises a chamber in a body, the chamber in fluid communication with an input port, a sampling port, and a pump port. The first seal mechanism forms a first airtight seal at the input port when a tube is connected to the input port. The second seal mechanism forms a second airtight seal at the sampling port when a probe for a gas analyzer system is inserted into the sampling port. A diverted air moves into the input port, through the chamber, and out of the pump port without increasing a pressure of the diverted air greater than a pressure level for the gas analyzer system to analyze an air sample from the diverted air when the diverted air is drawn through the chamber and out of the pump port. The probe obtains the air sample from the diverted air moving through the chamber. 
     Another embodiment of the present disclosure provides an air monitoring system comprising a computer system and a controller in the computer system. The controller operates to control a pump system to move air from a collection port for a cavity as diverted air to a tube connected to the collection port, move the diverted air into an input port of an air interface connected to the tube, through a chamber of the air interface, and out of a pump port of the air interface without increasing a pressure of the diverted air greater than a pressure level for a gas analyzer system to analyze an air sample collected from the diverted air. The collection port is at a location in the cavity in a platform and an airtight seal is present between the tube and the input port. The controller controls the gas analyzer system connected to a sampling port in the air interface by a probe to obtain the air sample from the diverted air moving through the air interface and analyze the air sample to determine a set of components in the air sample. 
     Yet another embodiment of the present disclosure provides a method for monitoring air. Air is moved from a collection port connected to a tube as diverted air. The diverted air is moved from the tube through an input port in an air interface, through a chamber of the air interface, and out of a pump port in the air interface without increasing a pressure of the diverted air greater than a pressure level for the gas analyzer system to analyze an air sample collected from the diverted air during movement of the diverted air though a chamber in the air interface. A first airtight seal is present between the tube and the input port and a second airtight seal is present between a probe of the gas analyzer system and a sampling port of the air interface. The air sample is obtained from the diverted air as the diverted air moves through the chamber using the probe inserted through the sampling port in the air interface. The air sample is analyzed by the gas analyzer system to determine a set of components in the air sample. 
     The features and functions can be achieved independently in various embodiments of the present disclosure or may be combined in yet other embodiments in which further details can be seen with reference to the following description and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The novel features believed characteristic of the illustrative embodiments are set forth in the appended claims. The illustrative embodiments, however, as well as a preferred mode of use, further objectives and features thereof, will best be understood by reference to the following detailed description of an illustrative embodiment of the present disclosure when read in conjunction with the accompanying drawings, wherein: 
         FIG. 1  is an illustration of a block diagram of an air collection environment in accordance with an illustrative embodiment; 
         FIG. 2  is an illustration of an aircraft with an air monitoring system in accordance with an illustrative embodiment; 
         FIG. 3  is an illustration of components in an analyzer in accordance with an illustrative embodiment; 
         FIG. 4  is an illustration of a cross-sectional view of an air interface in accordance with an illustrative embodiment; 
         FIG. 5  is an illustration of a cross-sectional view of an air interface in accordance with an illustrative embodiment; 
         FIG. 6  is an illustration of a cross-sectional view in accordance with an illustrative embodiment; 
         FIG. 7  is an illustration of a cross-section of a portion of a body of an aircraft in accordance with an illustrative embodiment; 
         FIG. 8  is an illustration of a collection port in accordance with an illustrative embodiment; 
         FIG. 9  is an illustration of a flowchart of a process for monitoring air in accordance with an illustrative embodiment; 
         FIG. 10  is an illustration of a flowchart of a process for moving air in accordance with an illustrative embodiment; 
         FIG. 11  is an illustration of a flowchart of a process for detecting a gas in an air sample in accordance with an illustrative embodiment; 
         FIG. 12  is an illustration of a flowchart of a process for analyzing airflow in accordance with an illustrative embodiment; 
         FIG. 13  is an illustration of a flowchart of a process for determining air quality in accordance with an illustrative embodiment; 
         FIG. 14  is an illustration of a flowchart of a process for determining air quality in accordance with an illustrative embodiment; 
         FIG. 15  is an illustration of a block diagram of a data processing system in accordance with an illustrative embodiment; 
         FIG. 16  is an illustration of an aircraft manufacturing and service method in accordance with an illustrative embodiment; and 
         FIG. 17  is an illustration of a block diagram of an aircraft in which an illustrative embodiment may be implemented. 
     
    
    
     DETAILED DESCRIPTION 
     The illustrative embodiments recognize and take into account one or more different considerations. For example, the illustrative embodiments recognize and take into account that gas chromatography mass spectrometers (GC-MS) can be used to analyze air samples. The illustrative embodiments recognize and take into account that a portable gas chromatography mass spectrometer unit can be moved from location to location in an aircraft to collect air samples in performing an airflow analysis for the aircraft. 
     The illustrative embodiments recognize and take into account that currently, portable gas chromatography mass spectrometer may need to be within three feet of the location from which an air sample is to be collected. The illustrative embodiments recognize and take into account that currently, the portable gas chromatography mass spectrometer may be unable to be positioned in or close enough to a cavity to collect an air sample for airflow analysis with this type of distance limitation. The illustrative embodiments recognize and take into account that access issues can be present for collecting the air samples from cavities in different locations. For example, the illustrative embodiments recognize and take into account that the cavities, such as the areas between insulation blankets and an aircraft skin for a fuselage, can be inaccessible or very difficult to access. Further, the illustrative embodiments recognize and take into account that the gas chromatography mass spectrometer may be unable to collect and analyze air that is pressurized at a pressure level greater than ambient atmospheric pressure. 
     Thus, the illustrative embodiments recognize and take into account that collecting the air samples for analysis may be more difficult than desired with currently used gas chromatography mass spectrometers. 
     Thus, the illustrative embodiments provide a method, apparatus, and system for collecting air samples without the need for the collection and testing apparatus to be in close proximity to the air sample, and in embodiments, provides the ability to collect and analyze air that is not pressurized. In addition, the illustrative embodiments reduce the need for lengthy tubing for collecting samples. Further, the illustrative embodiments provide for use of the air monitoring system in real-time. In one illustrative example, an air monitoring system comprises an air interface. The air interface has a body, a first seal mechanism, and a second seal mechanism. In this example, the body has a chamber with a first input port, a sampling port, and a pump port. 
     In this illustrative example, the chamber in the body is in fluid communication with the input port, the sampling port, and the pump port. The first seal mechanism is connected to the input port. The first seal mechanism forms a first airtight seal at the input port when a tube is connected to the input port. The second seal mechanism is connected to the sampling port. The second seal mechanism forms a second airtight seal at the sampling port when a probe for a gas analyzer system is inserted into the sampling port. 
     Diverted air can move into the input port, through the chamber, and out of the pump port without increasing a pressure of the diverted air greater than a pressure level for the gas analyzer system to analyze an air sample from the diverted air when the diverted air is drawn through the chamber and out of the pump port. A probe can obtain the air sample from the diverted air moving through the chamber. This air sample can be analyzed to identify components in the air sample. This analysis can be used for various purposes such as design changes or real-time air quality monitoring. 
     With reference now to the figures and, in particular, with reference to  FIG. 1 , an illustration of a block diagram of an air collection environment is depicted in accordance with an illustrative embodiment. In this illustrative example, air collection environment  100  is an environment in which air  102  can be collected for analysis. 
     As depicted, air monitoring system  104  can collect air  102  from platform  106 . In this illustrative example, platform  106  can take a number of different forms. For example, platform  106  can comprise one or more of a mobile platform, a stationary platform, a land-based structure, an aquatic-based structure, a space-based structure, an aircraft, a commercial aircraft, a rotorcraft, a tilt-rotor aircraft, a tilt wing aircraft, a vertical takeoff and landing aircraft, a surface ship, a cruise ship, a tank, a personnel carrier, a train, a spacecraft, a space station, a satellite, a submarine, an automobile, a power plant, a dam, a house, a manufacturing facility, and a building. 
     In this illustrative example, air monitoring system  104  can collect air  102  from a set of cavities  108  in platform  106 . As used herein, a “set of,” when used with reference to items, means one or more items. For example, a “set of cavities  108 ” is one or more of cavities  108 . In this illustrative example, when platform  106  takes the form of aircraft  110 , the set of cavities  108  can comprise at least one of an area between the outer skin of aircraft  110  and an insulation blanket layer, a passenger cabin, a galley, a cargo area, a cockpit, or some other suitable space within aircraft  110 . 
     As used herein, the phrase “at least one of,” when used with a list of items, means different combinations of one or more of the listed items can be used, and only one of each item in the list may be needed. In other words, “at least one of” means any combination of items and number of items may be used from the list, but not all of the items in the list are required. The item can be a particular object, a thing, or a category. 
     For example, without limitation, “at least one of item A, item B, or item C” may include item A, item A and item B, or item B. This example also may include item A, item B, and item C or item B and item C. Of course, any combinations of these items can be present. In some illustrative examples, “at least one of” can be, for example, without limitation, two of item A; one of item B; and ten of item C; four of item B and seven of item C; or other suitable combinations. 
     As depicted, air monitoring system  104  can comprise a number of different components. For example, air monitoring system  104  can comprise tube network  112 , a set of collection ports  114 , air interface  116 , pump system  118 , gas analyzer system  120 , computer system  122 , and controller  124 . 
     As depicted, the different components in air monitoring system  104  can move air  102  from cavity  126  in the set of cavities  108  as diverted air  128  to gas analyzer system  120  such that gas analyzer system  120  can collect air sample  130  from diverted air  128  for analysis. As a result, gas analyzer system  120  can remotely analyze air  102  in cavity  126 . This type of configuration reduces issues with moving portable gas analyzers to locations for real-time monitoring of air quality in platform  106 . This type of configuration can also produce issues with access to various locations in the set of cavities  108  in platform  106 . 
     In this illustrative example, air  102  is moved from cavity  126  as diverted air  128  to gas analyzer system  120  through the set of collection ports  114 , tube network  112 , and air interface  116 . For example, collection port  132  in the set of collection ports  114  for cavity  126  is in communication with cavity  126 . In this illustrative example, collection port  132  can be in communication with cavity  126  by being located within cavity  126 , being located in the opening to cavity  126 , or in some other suitable location that allows movement of air  102  from cavity  126  into collection port  132  as diverted air  128 . 
     In this illustrative example, the set of collection ports  114  including collection port  132  is connected to tube network  112  such that the set of collection ports  114  is in fluid communication with tube network  112 . Additionally, air interface  116  is connected to and in fluid communication with tube network  112 . In this illustrative example, air interface  116  is connected to tube  136  which is connected to tube network  112 . In some illustrative examples, tube  136  can be considered part of tube network  112 . 
     In this illustrative example, tube network  112  comprises network tubes  138  and valve system  140 . Network tubes  138  are connected to the set of collection ports  114  and to valve system  140 . As depicted, tube  136  is also connected to valve system  140 . Valve system  140  can operate to select collection port  132  in the set of collection ports  114  to be in communication with tube  136  such that air  102  is moved from cavity  126  in which collection port  132  is located as diverted air  128  through network tube  142  in network tubes  138  and into tube  136  connected to valve system  140  in tube network  112 . Diverted air  128  can then move through air interface  116 . 
     In this illustrative example, network tubes  138  and other tubes used in air monitoring system  104  can be selected from at least one of rigid tubes, flexible tubes, or other suitable types of tubes. These tubes can be comprised of materials that reduce the introduction of contaminants or the absorption of components in diverted air  128  moving through the tubes. 
     In illustrative example, the use of the term “in communication” or “in fluid communication” between different components means that at least one of air, other gases, or fluids can be moved between the different components. 
     As depicted, gas analyzer system  120  can be connected to air interface  116 . Gas analyzer system  120  can collect air sample  130  from diverted air  128  flowing through tube  136  and air interface  116 . 
     In this illustrative example, air interface  116  comprises chamber  144  in body  146 . Chamber  144  is in fluid communication with input port  148 , sampling port  150 , and pump port  152 . 
     As depicted, air interface  116  also includes first seal mechanism  154  connected to input port  148 . First seal mechanism  154  can form first airtight seal  156  at input port  148  when tube  136  is connected to input port  148 . Second seal mechanism  158  for air interface  116  is connected to sampling port  150 . Second seal mechanism  158  can form second airtight seal  159  at sampling port  150  when probe  160  for gas analyzer system  120  is connected to sampling port  150 . The connection of probe  160  can be performed by inserting probe  160  through sampling port  150  into chamber  144  in body  146  of air interface  116 . 
     In the illustrative example, these seal mechanisms can be comprised of a number of different types of materials. For example, the seal mechanisms can be manufactured using at least one of a synthetic rubber, a thermoset polymer, a thermoplastic polymer, butadiene rubber (BR), butyl rubber (IIR), a chlorosulfonated polyethylene (CSM), an ethylene propylene diene monomer (EPDM), an ethylene propylene rubber (EPR), fluoroelastomer (FKM), a nitrile rubber, a silicon rubber, a polyurethane, an ether-ester elastomer, a co-polyester, other suitable materials, or combinations thereof. 
     The selection of the material can be such that contaminants are not introduced into diverted air  128  flowing into and through air interface  116 . 
     Additionally, the selection of the material can also be such that the seals do not absorb or retain components  168  that may be present in diverted air  128  when air sample  130  is collected. 
     In this illustrative example, air interface  116  comprises a set of materials that avoids introducing a contaminant into air sample  130  or absorbing components from air sample  130 . For example, air interface  116  can comprise a set of materials selected from a group consisting of a metal, a plastic, a ceramic, and combinations thereof. The metal can be selected from one or more of aluminum, titanium, nickel, stainless steel, and alloys thereof. 
     During the movement of diverted air  128  into input port  148 , through chamber  144 , and out of pump port  152 , diverted air  128  can be moved by pump system  118  without increasing pressure  162  of diverted air  128  greater than pressure level  164  for gas analyzer system  120  to obtain and analyze air sample  130  from diverted air  128  when diverted air  128  is drawn through chamber  144  and out of pump port  152  by pump system  118 . In this example, probe  160  obtains air sample  130  from diverted air  128  moving through chamber  144 . Pressure  162  of diverted air  128  can be an ambient atmospheric pressure. In this illustrative example, pressure  162  of diverted air  128  is the pressure present when air sample  130  is collected by gas analyzer system  120 . 
     In this illustrative example, operation of pump system  118  and gas analyzer system  120  can be controlled by controller  124  in computer system  122 . Further, controller  124  can also control the operation of valve system  140  in tube network  112 . 
     Controller  124  can be implemented in software, hardware, firmware, or a combination thereof. When software is used, the operations performed by controller  124  can be implemented in program code configured to run on hardware, such as a processor unit. When firmware is used, the operations performed by controller  124  can be implemented in program code and data and stored in persistent memory to run on a processor unit. When hardware is employed, the hardware can include circuits that operate to perform the operations in controller  124 . 
     In the illustrative examples, the hardware can take a form selected from at least one of a circuit system, an integrated circuit, an application specific integrated circuit (ASIC), a programmable logic device, or some other suitable type of hardware configured to perform a number of operations. With a programmable logic device, the device can be configured to perform the number of operations. The device can be reconfigured at a later time or can be permanently configured to perform the number of operations. Programmable logic devices include, for example, a programmable logic array, a programmable array logic, a field programmable logic array, a field programmable gate array, and other suitable hardware devices. Additionally, the processes can be implemented in organic components integrated with inorganic components and can be comprised entirely of organic components excluding a human being. For example, the processes can be implemented as circuits in organic semiconductors. 
     Computer system  122  is a physical hardware system and includes one or more data processing systems. When more than one data processing system is present in computer system  122 , those data processing systems are in communication with each other using a communications medium. The communications medium can be a network. The data processing systems can be selected from at least one of a computer, a server computer, a tablet computer, or some other suitable data processing system. 
     In the illustrative example, controller  124  can control pump system  118  to move air  102  from collection port  132  for cavity  126  as diverted air  128  to tube  136  connected to collection port  132 , move diverted air  128  into input port  148  of air interface  116  connected to tube  136 , through chamber  144  of air interface  116 , and out of pump port  152  of air interface  116  without increasing pressure  162  of diverted air  128  greater than pressure level  164  for gas analyzer system  120  to analyze air sample  130  collected from diverted air  128 . Collection port  132  can be at a location in cavity  126  in platform  106 . An airtight seal, such as first airtight seal  156 , is present between tube  136  and input port  148 . 
     Additionally, controller  124  can also control gas analyzer system  120  connected to sampling port  150  in air interface  116  by probe  160  to obtain air sample  130  from diverted air  128  moving through air interface  116  and analyze air sample  130  to determine a set of components  168  in air sample  130  drawn from diverted air  128  by probe  160 . In this illustrative example, gas analyzer system  120  can comprise one or more gas analyzers selected from at least one of a gas chromatography mass spectrometer, a proton transfer reaction mass spectrometer, a biosensor, an optical biosensor, an electrochemical biosensor, or a combination thereof. 
     Further, controller  124  can control valve system  140  to select collection port  132  to move air  102  as diverted air  128 . This movement of diverted air  128  occurs through valve system  140  connecting network tube  142  in network tubes  138  to tube  136  enabling communication from collection port  132  to air interface  116 . In other words, valve system  140  can change configurations to select different network tubes in network tubes  138  to enable diverted air  128  to be drawn from air  102  in a selected cavity in the set of cavities  108 . 
     In one illustrative example, one or more technical solutions are present that overcome a problem with collecting air samples from different locations in platform  106 , such as aircraft  110 . As a result, one or more illustrative examples can provide a solution in which air monitoring system  104  operates to enable a gas analyzer system to divert air  102  from one or more cavities  108  in aircraft  110  in a manner that enables gas analyzer system  120  to obtain air sample  130  from diverted air  128  for analysis. In the illustrative example, air interface  116  is constructed such that diverted air  128  can flow through air interface  116  with pressure  162  at pressure level  164  that allows gas analyzer system  120  to obtain air sample  130  for analysis. 
     The construction of air interface  116  can be based on one or more dimensions of air interface  116 . For example, the dimensions can be selected such that pressure level  164  for pressure  162  of diverted air  128  is not greater than what gas analyzer system  120  can use to collect and analyze air sample  130 . 
     Gas analyzer system  120  can be sensitive to pressure  162  operating to obtain and analyze air sample  130 . If pressure  162  of diverted air  128  is greater than pressure level  164  that can be used by gas analyzer system  120 , gas analyzer system  120  may be unable to obtain air sample  130  in a manner needed to properly analyze air sample  130  to obtain a desired level of accuracy in the analysis. 
     Further, air monitoring system  104  in the illustrative example can overcome an issue with real-time monitoring of air quality in aircraft  110  using a portable gas analyzer such as a portable gas chromatography mass spectrometry (GC-MS) unit. The use of air interface  116  with tube network  112  connected to collection ports  114  in different locations in aircraft  110  allows for continuously monitoring air  102  for air quality and variations in real-time without the distance and access limitations of a portable gas chromatography mass spectrometry unit. 
     The illustration of air collection environment  100  in  FIG. 1  is not meant to imply physical or architectural limitations to the manner in which an illustrative embodiment may be implemented. Other components in addition to or in place of the ones illustrated may be used. Some components may be unnecessary. Also, the blocks are presented to illustrate some functional components. One or more of these blocks may be combined, divided, or combined and divided into different blocks when implemented in an illustrative embodiment. 
     For example, components such as air interface  116 , gas analyzer system  120 , and pump system  118  can be grouped to form analyzer  170 . In some illustrative examples, multiple analyzers can be present for platform  106 . In yet other illustrative examples, computer system  122  can be considered part of analyzer  170  and can be in communication with multiple analyzers to control their operation. As another example, a single air interface is shown in the depicted example in air collection environment  100 . In other illustrative examples, one or more air interfaces can be present in addition to or in place of air interface  116 . These air interfaces can connect to one or more gas analyzers within gas analyzer system  120  to tube network  112 . In yet other illustrative examples, one or more tube networks may be present in addition to tube network  112  within platform  106 . For example, when platform  106  is aircraft  110 , one tube network may be in communication with cavities  108  located between an insulation layer and the skin of aircraft  110 . Another tube network may be in communication with cavity  126  in the form of a passenger cabin in aircraft  110 . In another example, tube network  112  can be in communication with another cavity in cavities  108  such as a cargo hold or flight deck of aircraft  110 . 
     With reference next to  FIG. 2 , an illustration of an aircraft with an air monitoring system is depicted in accordance with an illustrative embodiment. In this illustrative example, commercial passenger aircraft  200  is an example of one implementation for aircraft  110  shown in block form in  FIG. 1 . In this illustrative example, commercial passenger aircraft  200  takes the form of a commercial passenger aircraft with fixed wings. 
     As depicted, commercial passenger aircraft  200  has wing  202  and wing  204  attached to body  206 . Commercial passenger aircraft  200  includes engine  208  attached to wing  202  and engine  210  attached to wing  204 . 
     Body  206  has tail section  212 . Horizontal stabilizer  214 , horizontal stabilizer  216 , and vertical stabilizer  218  are attached to tail section  212  of body  206 . 
     In this illustrative example, cavities in the interior of commercial passenger aircraft  200  can be seen within body  206  in this exposed view. As depicted in this exposed view, the cavities seen within commercial passenger aircraft  200  include portions of passenger cabin  220  and spaces between insulation layer  224  and skin  226  of body  206 . In this illustrative example, insulation layer  224  comprises insulation blankets. 
     Spaces  222  and passenger cabin  220  are examples of cavities  108  shown in block form in  FIG. 1 . Other cavities that can be present in commercial passenger aircraft  200  but not shown in this exposed view include a flight deck, a cargo area, a galley, a laboratory, or other suitable spaces. 
     In this illustrative example, air monitoring system  228  is located in commercial passenger aircraft  200  to detect at least one of air quality or airflow within commercial passenger aircraft  200 . This detection can be performed in real-time or at a later time using information logs resulting from sampling air within commercial passenger aircraft  200 . 
     In this illustrative example, air monitoring system  228  comprises a number of different components. As depicted, air monitoring system  228  comprises tube network  230 , tube network  232 , analyzer  234 , and analyzer  236 . 
     As depicted in this example, tube network  230  comprise tubes such as network tube  238 , network tube  240 , and network tube  242  connected to valve system  244 . As depicted, network tube  238  is connected to collection port  246 , which can divert air from passenger cabin  220  in spaces  222 ; network tube  240  is connected to collection port  248 , which can divert air from passenger cabin  220  in spaces  222 ; and network tube  242  is connected to collection port  250 , which can divert air from passenger cabin  220  in spaces  222 . In this example, valve system  244  is connected to an air interface in analyzer  236  by tube  252 . 
     In this illustrative example, tube network  232  comprise tubes such as network tube  254 , network tube  256 , and network tube  258  connected to valve system  260 . As depicted, network tube  254  is connected to collection port  262 , which can divert air from passenger cabin  220  in spaces  222 ; network tube  256  is connected to collection port  264 , which can divert air from passenger cabin  220  in spaces  222 ; and network tube  258  is connected to collection port  266 , which can divert air from passenger cabin  220  in spaces  222 . In this example, valve system  260  is connected to an air interface in analyzer  236  by tube  268 . 
     The illustration of commercial passenger aircraft  200  is not meant to limit the manner in which an illustrative example can be implemented in an aircraft. For example, other commercial passenger aircraft may include an upper passenger cabin and a lower passenger cabin separated by a deck. Although not shown, commercial passenger aircraft  200  also includes cavities in the form of cargo areas in which air quality monitoring can be performed. In other illustrative examples, air monitoring system  228  can be used in other types of aircraft other than commercial passenger aircraft  200 . Other types of aircraft in which an illustrative example can be implemented include, for example, a rotorcraft, a tiltrotor aircraft, a tilt wing aircraft, a vertical takeoff and landing aircraft, a military jet, a cargo aircraft, a cargo jet, or other suitable type of aircraft. 
     Turning now to  FIG. 3 , an illustration of components in an analyzer is depicted in accordance with an illustrative embodiment. The components illustrated in  FIG. 3  are examples of components that can be found in analyzer  170  in  FIG. 1 , analyzer  234  in  FIG. 2 , and analyzer  236  in  FIG. 2 . As depicted, these components include air interface  300 , pump  302 , and gas analyzer  304 . 
     As depicted, air interface  300  has input port  306 , pump port  308 , and sampling port  310 . 
     In this illustrative example, tube  312  is connected to input port  306  in air interface  300 . Tube  312  is also connected to a valve system such as valve system  140  in  FIG. 1 , valve system  244  in  FIG. 2 , and valve system  260  in  FIG. 2 . 
     As depicted, tube  312  connects pump  302  to input port  306  in air interface  300 . In this illustrative example, probe  314  for gas analyzer  304  is connected to sampling port  310  in air interface  300 . 
     In this illustrative example, pump  302  can operate to pump diverted air through tube  312  into input port  306  and out through pump port  308 . With the movement of the diverted air, gas analyzer  304  can obtain an air sample using probe  314  inserted into sampling port  310 . In this illustrative example, pump  302  operates such that the pressure of the diverted air is at a level that enables gas analyzer  304  to obtain an air sample for analysis. 
     With reference next to  FIG. 4 , an illustration of a cross-sectional view of an air interface is depicted in accordance with an illustrative embodiment. In the illustrative examples, the same reference numeral may be used in more than one figure. This reuse of a reference numeral in different figures represents the same element in the different figures. In this figure, a cross-sectional view of air interface  300  is shown taken along lines  4 - 4  in  FIG. 3 . 
     In this cross-sectional view, body  406  of air interface  300  has a T-shape. In this view, tube  312  is shown as being connected to input port  306 . In this illustrative example, the connection is made by inserting tube  312  into input port  306 . 
     Further, an airtight seal is formed between tube  312  and input port  306 . This seal can be formed using seal  400 . Seal  400  is a mechanical seal that aids in joining tube  312  to input port  306  in a manner that prevents leakage of diverted air  402  flowing through tube  312  into chamber  404  inside body  406  of air interface  300  through input port  306 . As depicted, seal  400  is an O-ring seal. In this illustrative example, an airtight seal can also be formed between tube  412  and pump port  308  using seal  408 , which can also be an O-ring seal. 
     As depicted, probe  314  is inserted through sampling port  310 . An airtight seal can also be formed between probe  314  and sampling port  310  using seal  410 . As depicted, seal  410  can also take the form of an O-ring seal. In the illustrative example, the airtight seals at the different ports can reduce or prevent contaminants from being introduced into diverted air  402  as diverted air  402  flows from tube  312  into input port  306  through chamber  404  and body  406  and out through tube  312  connected to pump port  308 . 
     In this illustrative example, probe  314  is inserted into sampling port  310  that probe  314  extends through chamber  404  and input port  306 . In this illustrative example, end  416  of probe  314  extends through input port  306  into tube  312 . This position of probe  314 , with end  416  being located within tube  312 , can reduce concerns that contaminants may be introduced into diverted air  402  or components may be removed from diverted air  402  by various materials that may be used to construct body  406 , seal  400 , seal  408 , and seal  410 . With this position, air sample  414  is collected by probe  314  from diverted air  402  prior to diverted air  402  moving through body  406  of air interface  300 . 
     With reference to  FIG. 5 , an illustration of a cross-sectional view of an air interface is depicted in accordance with an illustrative embodiment. In this figure, a cross-sectional view of air interface  300  is shown taken along lines  4 - 4  in  FIG. 3 . 
     As depicted in this view, probe  314  does not extend into tube  312 . As depicted, end  416  of probe  314  remains within body  406  of air interface  300 . As illustrated in this example, probe  314  extends through sampling port  310 , chamber  404 , and into input port  306 . 
     With now reference to  FIG. 6 , an illustration of a cross-sectional view is depicted in accordance with an illustrative embodiment. A cross-sectional view of air interface  300  is shown taken along lines  6 - 6  in  FIG. 4 . This view shows a visualization of diameters for tube  312 , seal  400 , input port  306 , and probe  314 . In this illustrative example, tube  312  has first diameter  600  and probe  314  has second diameter  602 . 
     As depicted, first diameter  600  for tube  312  is larger than second diameter  602  of probe  314 . In this example, first diameter  600  and second diameter  602  have a ratio of approximately 3.5:1. This ratio is one example of a dimension that may be used for air interface  300 . 
     In this illustrative example, the ratios can be selected to obtain a desired flow rate of diverted air  402  without increasing the pressure of diverted air  402  to a level greater than can be present for the gas analyzer to operate to obtain air sample  414  for analysis. This ratio can also be selected based on the operation of the pump drawing diverted air  402 . For example, the rate at which air flows when the pump pulls air can be taken into consideration with selecting the ratios to obtain the desired pressure for diverted air  402 . 
     The illustration of air interface  300  in  FIGS. 3-6  is an example of one manner in which air interface  116  shown in block form in  FIG. 1  can be implemented. In other illustrative examples, the air interface can have a different shape other than a T-shape. For example, the air interface can have a Y-shape or other suitable shape. Further, in other illustrative examples, end  416  of probe  314  may extend into tube  312  while remaining in input port  306  when tube  312  is connected to input port  306  by being inserted into input port  306 . 
     Turning next to  FIG. 7 , an illustration of a cross-section of a portion of a body of an aircraft is depicted in accordance with an illustrative embodiment. In this depicted example, body  700  is an example of a structure or fuselage for an aircraft such as aircraft  110  shown in block form in  FIG. 1  or for commercial passenger aircraft  200  in  FIG. 2 . 
     In this illustrative example, cavities are present within body  700 . As depicted, cavity  702 , cavity  704 , and cavity  706  can be seen in this cross-sectional view of a portion of body  700 . 
     Cavity  702  is the space between skin  708  and insulation layer  710  of body  700 . Insulation layer  710  can be comprised of insulation blankets. Cavity  702  is a cavity in which moisture can at least one of collect, condense, or freeze during operation of an aircraft. 
     In this example, cavity  706  is an interior cavity within body  700 . For example, cavity  706  can be a passenger cabin or a flight deck of the aircraft. 
     As depicted, cavity  704  is a location where tube network  712  can run within body  700 . In this illustrative example, tube network  712  comprises tube  714 , tube  716 , tube  718 , and tube  719 . These tubes can be indirectly connected to a gas analyzer through a valve system or can be directly connected to the gas analyzer depending on the particular implementation. 
     In this illustrative example, collection port  720  is located in cavity  704 . Collection port  720  is located on skin  708  in this illustrative example. In other depicted examples, collection port  720  can be located on insulation layer  710  or located in some other location in cavity  702  between skin  708  and insulation layer  710 . As depicted, collection port  720  is connected to tube  714  and tube  716 . 
     Collection port  720  is a device that provides an opening to collect air  726  located within cavity  702  such that air  726  can be moved through at least one of tube  714  or tube  716  as diverted air. In one illustrative example, gas  728  can be introduced into cavity  702  though tube  716  and air  726  can be collected through tube  714 . Depending on the implementation, both tubes can introduce gas  728  into cavity  702  or collect air  726  from cavity  702 . In this illustrative example, the gas can take a number of different forms. For example, the gas can be selected as one that can be detected by a gas analyzer. For example, the gas can be xenon or some other noble or inert gas. The particular gas can be selected as one that can be odorless, colorless, and have a desired level of chemical reactivity. Other examples of gases that may be selected include helium, neon, and argon. 
     In this example, gas  728  introduced at the location of collection port  720  can travel within cavity  702 . Gas  728  can be detected in air  726  in another location in cavity  702  at collection port  721 . In this example, collection port  721  is located on skin  708  within cavity  702 . 
     Air  726  can be moved through tube  719  as diverted air. Additionally, this diverted air can also include gas  728 . The time for gas  728  to travel from a first location at collection port  720  to a second location at collection port  721  can be determined to calculate air from within cavity  702  between those two locations. In the calculation, the time between the introduction of gas  728  and the detection of gas  728  can be adjusted to take into account travel time to reach a gas analyzer from tube  719  and other parts of tube network  712 . 
     In this example, collection port  722  is located in ceiling structure  724 . As depicted, ceiling structure  724  is a structural component that separates crown area of aircraft from the passenger cabin, flight deck, or other interior areas. Collection port  722  is connected to tube  718  in tube network  712 . In this example, collection port  722  can provide an opening to collect air  730  from cavity  706 . Air  730  collected from cavity  706  can be moved through tube  718  as diverted air for analysis by the gas analyzer. 
     This analysis can be used to determine air quality within cavity  706 . This type of analysis can be performed in real-time during operation of the aircraft. With multiple collection ports in communication with cavity  706 , the air quality in different parts of cavity  706  can be determined. An indication of an undesired air quality such as an odor can be used to locate the source of an odor to reduce or cease generation of the odor. 
     With reference now to  FIG. 8 , an illustration of a collection port is depicted in accordance with an illustrative embodiment. Collection port  800  is an example of one implementation for collection port  132  and other collection ports in collection ports  114  in  FIG. 1 . Collection port  800  can also be an example implementation for one or more of collection port  246 , collection port  248 , collection port  250 , collection port  262 , collection port  264 , and collection port  266  in  FIG. 2 . Collection port  800  can also be used to implement collection port  720 , collection port  721 , and collection port  722  in  FIG. 7 . 
     Collection port  800  can be comprised of a number of different types of materials. For example, one or more materials can be selected based on factors such as weight and different temperatures to which collection port  800  may be exposed. Additionally, the material can be selected as material that reduces at least one of the introduction of contaminants or the absorption of components from air drawn through collection port  800 . 
     In this illustrative example, collection port  800  has opening  802  and opening  804  through which air can be drawn from a cavity. Opening  802  leads to connector  806  and opening  804  leads to connector  808 . 
     These two connectors can be connected to tubes to draw air into the tubes for movement as diverted air. In one illustrative example, opening  802  and connector  806  can be connected to a tube that introduces a gas into the cavity while opening  804  and connector  808  can be connected to a tube that draws air from the cavity. In this illustrative example, when used to implement collection port  721  and collection port  722  in  FIG. 7 , collection port  800  has a single opening and connector. 
     The illustrations of collection ports and the tube network in  FIG. 7  and  FIG. 8  are presented for purposes of showing one illustrative example of how different components can be implemented. These illustrations are not meant to limit the manner in which other illustrative examples can be implemented. For example, other numbers of tubes and collection ports can be used in the portion of the aircraft displayed. As another example, the collection ports can have a different shape other than the cylindrical shape shown in  FIG. 7  and  FIG. 8 . For example, a collection port can have a shape of a hemisphere, a cube, a cuboid, a triangular prism, a square pyramid, or some other suitable shape that includes openings to draw air from a cavity. 
     Turning next to  FIG. 9 , an illustration of a flowchart of a process for monitoring air is depicted in accordance with an illustrative embodiment. The process in  FIG. 9  can be implemented in hardware, software, or both. When implemented in software, the process can take the form of program code that is run by one or more processor units located in one or more hardware devices in one or more computer systems. For example, the process can be implemented in controller  124  in computer system  122  in  FIG. 1 . These different operations can be implemented in controller  124  to control the operation of different components in air monitoring system  104  in  FIG. 1  to monitor air in a platform. 
     The process begins by moving air from a collection port connected to a tube as diverted air (operation  900 ). The process moves the diverted air from the tube through an input port in an air interface, through a chamber in the air interface, and out of a pump port in the air interface without increasing a pressure of the diverted air greater than a pressure level for a gas analyzer system to analyze an air sample collected from the diverted air during movement of the diverted air though a chamber in the air interface; and wherein a first airtight seal is present between the tube and the input port and a second airtight seal is present between a probe of the gas analyzer system and a sampling port of the air interface (operation  902 ). 
     The process obtains the air sample from the diverted air as the diverted air moves through the chamber using the probe inserted through the sampling port in the air interface (operation  904 ). The process analyzes, by the gas analyzer system, the air sample to determine a set of components in the air sample (operation  906 ). The process terminates thereafter. 
     Turning to  FIG. 10 , an illustration of a flowchart of a process for moving air is depicted in accordance with an illustrative embodiment. The operation in this flowchart is an example of an operation that can be performed with other operations in the flowchart in  FIG. 9 . In this example, a collection port is at a location in a cavity in a platform and a tube is connected to the collection port by a tube network in a platform. 
     The process moves diverted air from the collection port at a location in a cavity in a platform to the tube through a tube network in the platform (operation  1000 ). The process terminates thereafter. 
     This operation can be performed after the air is moved from the collection port as diverted air. The process can move the air to the tube through the tube network as described in operation  1000 . This operation is optional and is not necessary when the tube is connected directly to the collection port. 
     With reference now to  FIG. 11 , an illustration of a flowchart of a process for detecting a gas in an air sample is depicted in accordance with an illustrative embodiment. The flowchart in  FIG. 11  is an example of implementation for operation  906  in  FIG. 9 . In this example, a gas is injected into a set of cavities in a first location in a set of cavities and a collection port is located at a second location in the set of cavities in a platform. 
     The process begins by detecting a gas in an air sample in diverted air received from a second location in a cavity in a set of cavities through a tube connected to a tube network that is in communication with a collection port in the second location in the cavity in the set of cavities (operation  1100 ). The process terminates thereafter In this example, the gas is a component in the set of components. 
     In  FIG. 12 , an illustration of a flowchart of a process for analyzing airflow is depicted in accordance with an illustrative embodiment. The flowchart in  FIG. 12  is an example of an operation that can be performed with the other operations in  FIG. 9  and  FIG. 11  using the gas detected as a component in the set of components in the air sample. 
     The process then begins by determining a velocity of an air flow of air based on a distance from a first location to a second location and a first time when the gas is injected into a set of cavities at the first location and a second time when the gas is detected in the air sample from the diverted air in the second location (operation  1200 ). The process terminates thereafter. 
     Tuning to  FIG. 13 , an illustration of a flowchart of a process for determining air quality is depicted in accordance with an illustrative embodiment. The flowchart in  FIG. 13  is an example of an operation that can be performed with the other operations in  FIG. 9 . 
     The process begins by determining air quality of air at a location of a collection port in a cavity in a platform using an analysis of an air sample generated by a gas analyzer system analyzing the air sample (operation  1300 ). The process terminates thereafter. 
     The operations in  FIG. 13  can be performed in real-time by analyzing air samples as quickly as possible during operation of the platform. In other illustrative examples, the operations can be performed later based on analysis results of the air samples that have been logged or stored in a database. 
     The process illustrated in  FIG. 13  can be used to determine the air quality at different locations in a platform. This analysis can be used to determine whether particular locations may need further analysis or whether changes may be needed to improve or change the air quality at particular locations. This information can also be used to generate air quality maps for a platform. 
     With reference next to  FIG. 14 , an illustration of a flowchart of a process for determining air quality is depicted in accordance with an illustrative embodiment. The process illustrated in  FIG. 14  is an example of one implementation for operation  1300  in  FIG. 13 . 
     The process determines air quality of air at a location in a cavity using an analysis of an air sample generated by a gas analyzer system analyzing the air sample during operation of a platform (operation  1400 ). The process terminates thereafter. In this manner, the air quality of the platform, such as an aircraft, can be monitored during flight of the aircraft. 
     The flowcharts and block diagrams in the different depicted embodiments illustrate the architecture, functionality, and operation of some possible implementations of apparatuses and methods in an illustrative embodiment. In this regard, each block in the flowcharts or block diagrams can represent at least one of a module, a segment, a function, or a portion of an operation or step. For example, one or more of the blocks can be implemented as program code, hardware, or a combination of the program code and hardware. When implemented in hardware, the hardware can, for example, take the form of integrated circuits that are manufactured or configured to perform one or more operations in the flowcharts or block diagrams. When implemented as a combination of program code and hardware, the implementation may take the form of firmware. Each block in the flowcharts or the block diagrams can be implemented using special purpose hardware systems that perform the different operations or combinations of special purpose hardware and program code run by the special purpose hardware. 
     In some alternative implementations of an illustrative embodiment, the function or functions noted in the blocks may occur out of the order noted in the figures. For example, in some cases, two blocks shown in succession may be performed substantially concurrently, or the blocks may sometimes be performed in the reverse order, depending upon the functionality involved. Also, other blocks may be added in addition to the illustrated blocks in a flowchart or block diagram. 
     Turning now to  FIG. 15 , an illustration of a block diagram of a data processing system is depicted in accordance with an illustrative embodiment. Data processing system  1500  can also be used to implement computer system  122 . In this illustrative example, data processing system  1500  includes communications framework  1502 , which provides communications between processor unit  1504 , memory  1506 , persistent storage  1508 , communications unit  1510 , input/output (I/O) unit  1512 , and display  1514 . In this example, communications framework  1502  takes the form of a bus system. 
     Processor unit  1504  serves to execute instructions for software that can be loaded into memory  1506 . Processor unit  1504  includes one or more processors. For example, processor unit  1504  can be selected from at least one of a multicore processor, a central processing unit (CPU), a graphics processing unit (GPU), a physics processing unit (PPU), a digital signal processor (DSP), a network processor, or some other suitable type of processor. Further, processor unit  1504  can may be implemented using one or more heterogeneous processor systems in which a main processor is present with secondary processors on a single chip. As another illustrative example, processor unit  1504  can be a symmetric multi-processor system containing multiple processors of the same type on a single chip. 
     Memory  1506  and persistent storage  1508  are examples of storage devices  1516 . A storage device is any piece of hardware that is capable of storing information, such as, for example, without limitation, at least one of data, program code in functional form, or other suitable information either on a temporary basis, a permanent basis, or both on a temporary basis and a permanent basis. Storage devices  1516  may also be referred to as computer-readable storage devices in these illustrative examples. Memory  1506 , in these examples, can be, for example, a random-access memory or any other suitable volatile or non-volatile storage device. Persistent storage  1508  can take various forms, depending on the particular implementation. 
     For example, persistent storage  1508  may contain one or more components or devices. For example, persistent storage  1508  can be a hard drive, a solid-state drive (SSD), a flash memory, a rewritable optical disk, a rewritable magnetic tape, or some combination of the above. The media used by persistent storage  1508  also can be removable. For example, a removable hard drive can be used for persistent storage  1508 . 
     Communications unit  1510 , in these illustrative examples, provides for communications with other data processing systems or devices. In these illustrative examples, communications unit  1510  is a network interface card. 
     Input/output unit  1512  allows for input and output of data with other devices that can be connected to data processing system  1500 . For example, input/output unit  1512  can provide a connection for user input through at least one of a keyboard, a mouse, or some other suitable input device. Further, input/output unit  1512  can send output to a printer. Display  1514  provides a mechanism to display information to a user. 
     Instructions for at least one of the operating system, applications, or programs can be located in storage devices  1516 , which are in communication with processor unit  1504  through communications framework  1502 . The processes of the different embodiments can be performed by processor unit  1504  using computer-implemented instructions, which can be located in a memory, such as memory  1506 . 
     These instructions are referred to as program code, computer usable program code, or computer-readable program code that can be read and executed by a processor in processor unit  1504 . The program code in the different embodiments can be embodied on different physical or computer-readable storage media, such as memory  1506  or persistent storage  1508 . 
     Program code  1518  is located in a functional form on computer-readable media  1520  that is selectively removable and can be loaded onto or transferred to data processing system  1500  for execution by processor unit  1504 . Program code  1518  and computer-readable media  1520  form computer program product  1522  in these illustrative examples. In the illustrative example, computer-readable media  1520  is computer-readable storage media  1524 . 
     Computer-readable storage media  1524  is a physical or tangible storage device used to store program code  1518  rather than a media that propagates or transmits program code  1518 . Computer-readable storage media  1524 , as used herein, is not to be construed as being transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission media (e.g., light pulses passing through a fiber-optic cable), or electrical signals transmitted through a wire, as used herein, is not to be construed as being transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission media (e.g., light pulses passing through a fiber-optic cable), or electrical signals transmitted through a wire. 
     Alternatively, program code  1518  can be transferred to data processing system  1500  using a computer-readable signal media. The computer-readable signal media are signals and can be, for example, a propagated data signal containing program code  1518 . For example, the computer-readable signal media can be at least one of an electromagnetic signal, an optical signal, or any other suitable type of signal. These signals can be transmitted over connections, such as wireless connections, optical fiber cable, coaxial cable, a wire, or any other suitable type of connection. 
     Further, as used herein, “computer-readable media  1520 ” can be singular or plural. For example, program code  1518  can be located in computer-readable media  1520  in the form of a single storage device or system. In another example, program code  1518  can be located in computer-readable media  1520  that is distributed in multiple data processing systems. In other words, some instructions in program code  1518  can be located in one data processing system while other instructions in program code  1518  can be located in one data processing system. For example, a portion of program code  1518  can be located in computer-readable media  1520  in a server computer while another portion of program code  1518  can be located in computer-readable media  1520  located in a set of client computers. 
     The different components illustrated for data processing system  1500  are not meant to provide architectural limitations to the manner in which different embodiments can be implemented. In some illustrative examples, one or more of the components may be incorporated in or otherwise form a portion of, another component. For example, memory  1506 , or portions thereof, can be incorporated in processor unit  1504  in some illustrative examples. The different illustrative embodiments can be implemented in a data processing system including components in addition to or in place of those illustrated for data processing system  1500 . Other components shown in  FIG. 15  can be varied from the illustrative examples shown. The different embodiments can be implemented using any hardware device or system capable of running program code  1518 . 
     Illustrative embodiments of the disclosure may be described in the context of aircraft manufacturing and service method  1600  as shown in  FIG. 16  and aircraft  1700  as shown in  FIG. 17 . Turning first to  FIG. 16 , an illustration of an aircraft manufacturing and service method is depicted in accordance with an illustrative embodiment. During pre-production, aircraft manufacturing and service method  1600  may include specification and design  1602  of aircraft  1700  in  FIG. 17  and material procurement  1604 . 
     During production, component and subassembly manufacturing  1606  and system integration  1608  of aircraft  1700  in  FIG. 17  takes place. Thereafter, aircraft  1700  in  FIG. 17  can go through certification and delivery  1610  in order to be placed in service  1612 . While in service  1612  by a customer, aircraft  1700  in  FIG. 17  is scheduled for routine maintenance and service  1614 , which may include modification, reconfiguration, refurbishment, and other maintenance or service. 
     Each of the processes of aircraft manufacturing and service method  1600  may be performed or carried out by a system integrator, a third party, an operator, or some combination thereof. In these examples, the operator may be a customer. For the purposes of this description, a system integrator may include, without limitation, any number of aircraft manufacturers and major-system subcontractors; a third party may include, without limitation, any number of vendors, subcontractors, and suppliers; and an operator may be an airline, a leasing company, a military entity, a service organization, and so on. 
     With reference now to  FIG. 17 , an illustration of an aircraft is depicted in which an illustrative embodiment may be implemented. In this example, aircraft  1700  is produced by aircraft manufacturing and service method  1600  in  FIG. 16  and may include airframe  1702  with plurality of systems  1704  and interior  1706 . Examples of systems  1704  include one or more of propulsion system  1708 , electrical system  1710 , hydraulic system  1712 , and environmental system  1714 . Any number of other systems may be included. Although an aerospace example is shown, different illustrative embodiments may be applied to other industries, such as the automotive industry. In this illustrative example, an air monitoring system, such as air monitoring system  104  in  FIG. 1 , can be implemented in environmental system  1714  and aircraft  1700 . 
     Apparatuses and methods embodied herein may be employed during at least one of the stages of aircraft manufacturing and service method  1600  in  FIG. 16 . 
     In one illustrative example, components or subassemblies produced in component and subassembly manufacturing  1606  in  FIG. 16  can be fabricated or manufactured in a manner similar to components or subassemblies produced while aircraft  1700  is in service  1612  in  FIG. 16 . As yet another example, one or more apparatus embodiments, method embodiments, or a combination thereof can be utilized during production stages, such as component and subassembly manufacturing  1606  and system integration  1608  in  FIG. 16 . One or more apparatus embodiments, method embodiments, or a combination thereof may be utilized while aircraft  1700  is in service  1612 , during maintenance and service  1614  in  FIG. 16 , or both. The use of a number of the different illustrative embodiments may substantially expedite the assembly of aircraft  1700 , reduce the cost of aircraft  1700 , or both expedite the assembly of aircraft  1700  and reduce the cost of aircraft  1700 . 
     For example, components for an air monitoring system, such as air monitoring system  104 , can be designed during specification and design  1602  and manufactured during component and subassembly manufacturing  1606 . These components can be installed during system integration  1608  of aircraft  1700 . As another example, the different components can be manufactured and installed during maintenance and service  1614 . Maintenance and service  1614  can include modification, reconfiguration, refurbishment, and other maintenance or service of aircraft  1700 . 
     The air monitoring system can be operated during operation of aircraft  1700 . This air monitoring system can collect data for analysis in updates or changes in the design of aircraft  1700 . For example, these design changes can include at least at least one of selecting insulation blankets, stringer layouts, or other components that may be located between the insulation layer and the skin of aircraft  1700 . 
     In another example, the air monitoring system can operate during in service  1612  to monitor for air quality in the cabin, flight deck, galley, laboratories, cargo area, or other areas within aircraft  1700 . This operation can be used to monitor air quality during the flight of aircraft  1700 . 
     Thus, the illustrative examples provide a method, apparatus, system, and computer program product for an air monitoring system. In one illustrative example, a method for monitoring air is provided. Air is moved from a collection port connected to a tube as diverted air. The diverted air is moved from the tube thorough an input port in an air interface, through a chamber in the air interface, and out of a pump port in the air interface without increasing a pressure of the diverted air greater than a pressure level for the gas analyzer system to analyze an air sample collected from the diverted air during movement of the diverted air though the chamber in the air interface. A first airtight seal is present between the tube and the input port and a second airtight seal is present between a probe of the gas analyzer system and a sampling port of the air interface. The air sample is obtained from the diverted air as the diverted air moves using the probe inserted through the sampling port in the air interface as the diverted air moves through the chamber in the air interface. The gas analyzer system analyzes the air sample to determine a set of components in the air sample. 
     Another embodiment of the present disclosure provides an air monitoring system comprising a computer system and a controller in the computer system. The controller operates to control a pump system to move air from a collection port for a cavity as diverted air to a tube connected to the collection port, move the diverted air into an input port of an air interface connected to the tube, through a chamber in the air interface, and out of a pump port of the air interface without increasing a pressure of the diverted air greater than a pressure level for a gas analyzer system to analyze an air sample collected from the diverted air. The collection port is at a location in the cavity in a platform, wherein an airtight seal is present between the tube and the input port. The controller operates to control the gas analyzer system connected to a sampling port in the air interface by a probe to obtain the air sample from the diverted air moving through the air interface and analyze the air sample to determine a set of components in the air sample. 
     In the illustrative example, the use of the air interface can be used to draw air from cavities to monitor airflow patterns within the cavities in a platform such as aircraft. Further, the air interface can also be used to draw air from cavities to monitor the air quality at different locations in the platform. In the illustrative example, the air interface can be connected to a valve system that can selectively connect the air interface to multiple collection ports at different locations in one or more cavities. 
     Further, an air monitoring system in the illustrative example can overcome an issue with real-time monitoring of air quality in an aircraft using a portable gas analyzer such as a portable gas chromatography mass spectrometry (GC-MS) unit. The use of an air interface with a tube network connected to the collection ports in different locations in an aircraft allows for continuously monitoring of air for air quality and variations in real-time without the distance and access limitations of a portable gas chromatography mass spectrometry unit. 
     The air monitoring system in the illustrative examples overcomes an issue with real-time monitoring of air quality in an aircraft using a portable gas analyzer such as a portable gas chromatography mass spectrometry (GC-MS) unit. The use of interface with a tube network connected to collection ports at different locations in an aircraft allows for continuously monitoring of air samples for air quality and variations in real-time without the distance and access limitations of a portable gas chromatography mass spectrometry (GC-MS) unit. 
     The description of the different illustrative embodiments has been presented for purposes of illustration and description and is not intended to be exhaustive or limited to the embodiments in the form disclosed. The different illustrative examples describe components that perform actions or operations. In an illustrative embodiment, a component can be configured to perform the action or operation described. For example, the component can have a configuration or design for a structure that provides the component an ability to perform the action or operation that is described in the illustrative examples as being performed by the component. Further, to the extent that terms “includes”, “including”, “has”, “contains”, and variants thereof are used herein, such terms are intended to be inclusive in a manner similar to the term “comprises” as an open transition word without precluding any additional or other elements. 
     Many modifications and variations will be apparent to those of ordinary skill in the art. Further, different illustrative embodiments may provide different features as compared to other desirable embodiments. The embodiment or embodiments selected are chosen and described in order to best explain the principles of the embodiments, the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.