Abstract:
An automated interactive method dynamically identifies an unplanned maintenance task during execution of a planned maintenance task on equipment. A user device displays a maintenance menu system for data entry and access and provides an input relating to unplanned maintenance task discovered on the equipment. The unplanned maintenance task is associated with the planned maintenance task at least with respect to a location. The automated interactive method sequentially processes unplanned maintenance task information based on the input from the user device. The automated interactive method establishes and stores an unplanned maintenance task data record including a selected geographical location, a selected item, a selected work category, a selected task type, a selected task description, and selected component data of the unplanned maintenance task.

Description:
PRIORITY 
       [0001]    This application is a continuation of the U.S. application Ser. No. 09/946,095, filed on Sep. 4, 2001, the disclosure of which is incorporated herein by reference. 
     
    
     BACKGROUND 
       [0002]    This application relates generally to managing maintenance of equipment. More particularly, this invention relates to identification, categorization, and integration of unplanned maintenance repair and overhaul (MRO) work in an MRO business organization. 
         [0003]    A number of businesses focus their operations on the maintenance, repair or overhaul of complex equipment. Aircraft fleet and truck fleet maintenance are two commonly known businesses in this arena. In addition, other business that have to maintain expensive complex machinery and other capital equipment such as fully automated manufacturing plants also require the maintenance, repair and/or overhaul of their equipment to keep the business operations running profitably. 
         [0004]    Historically, within MRO business organizations, resource planning has been performed as a product of resource availability within a very near term time window, usually within weeks. The specific scheduling activity of MRO tasks usually is the product of responding to emergencies and matters of necessities to keep a particular end item, or a piece of equipment, in service. The result is that maintenance schedules often serve as general guidelines with critical resources being poorly allocated. Those resources typically need to be continually swapped and reallocated in an ad hoc manner to meet the emergency maintenance needs. This informality often results in both excessive equipment down times and excessive cost of maintenance. 
         [0005]    Scheduling systems have been developed to permit the performance of MRO tasks to a predefined schedule and support that schedule with the correct components, raw materials, information, skilled or certified personnel, tooling and facilities. The ability to reliably schedule MRO work is important to an MRO business and its customers. The predictability of schedule performance is one of the most difficult issues facing MRO management. Such predictability is the foundation of both financial and technical success for an MRO business. 
         [0006]    In the MRO environment, and especially while performing maintenance on more technically complex end items, the discovery of unplanned work (also known as “above and beyond”, or “emergent” work) during the execution of the original maintenance plan is problematic. Such unplanned maintenance work increases the level of difficulty of the effort, makes the supporting of the original plan much less efficient, and can create chaos within the work schedule. Of all of the tasks which must be performed once an item of unplanned work is discovered, the actual identification and categorization of the work content for that unplanned item is one of the most crucial factors in successfully dealing with the unplanned work and the schedule. 
         [0007]    Historically, the identification and categorization of such unplanned work has been manual in nature, open to great latitude in description (both as to accuracy and detail of the description), and time consuming for the mechanic or technician. Additionally, the time spent performing the essentially clerical task of identifying and categorizing the work is time lost from the execution of the already planned maintenance. This is a source of inefficiency and wasted resources. 
         [0008]    In those industries subject to extensive government regulation, the degree of detail required in the description of such tasks compounds the problem further. For example, commercial and military aircraft MRO operations must be scheduled and logged in accordance with government requirements. Disruptions to the schedule must also be logged and accounted. Manual records must be maintained for subsequent verification by regulators. The processing of these manual records, the reaction of the full business to the content of those records (purchasing of components; assignments of personnel; etc.), and the degree of human error represented by those records has made them a serious roadblock to the improvement of the MRO businesses. 
         [0009]    Further difficulty occurs when attempts are made to integrate newly identified and categorized work with a pre-existing maintenance plan. This difficulty arises in reference to the placement and sequencing of the discovered work within the pre-existing plan. This difficulty also arises in reference to the availability of the required components, information, tooling, and certified personnel to perform the tasks. A general rule of thumb is that over 50% of the tasks accomplished by an MRO activity were not part of the original workplan, and well over 60% of the time required to perform the tasks (and the cost associated with the maintenance business) are originally unplanned, meaning discovered during planned work execution. 
         [0010]    Accordingly, there is a need for improved methods and apparatus for identification, categorization and integration of unplanned MRO work in a schedule of planned work. 
       BRIEF SUMMARY 
       [0011]    By way of introduction only, the present invention provides an automated interactive method for dynamically identifying an unplanned maintenance task during execution of a planned maintenance task on equipment and creating a corresponding unplanned maintenance task data record associated with the planned maintenance task. The automated interactive method includes displaying on a user device a maintenance menu system for data entry and access, receiving from the user device a selected geographical location of unplanned maintenance work discovered on the equipment. The unplanned maintenance work includes a first unplanned maintenance task associated with the selected geographical location and a second unplanned maintenance task not associated with the selected geographical location. The automated interactive method also includes establishing, through a task pointer, a first path to the first unplanned maintenance task on the equipment, establishing, through a location pointer, a second path through the selected geographical location to both the planned maintenance task and the first unplanned maintenance task, and displaying on the user device the first unplanned maintenance task and suppressing display of the second unplanned maintenance task. The automated interactive method further includes receiving from the user device a selection specifying the first unplanned maintenance task at the selected geographical location of the equipment, receiving from the user device a selected work category to assign to the first unplanned maintenance task, receiving from the user device a selected task type to associate with the selected work category, determining a task description corresponding to the selected task type, acquiring component data for the first unplanned maintenance task; and establishing and storing in a memory a resultant unplanned maintenance task data record including the selected geographical location, the selected item, the selected work category, the selected task type, the task description, and the component data. 
         [0012]    By way of introduction only, the present invention provides in one embodiment a method for managing maintenance of equipment. The method includes identifying a planned MRO task and a first set of components associated with the task and determining a set of probabilities associated with a second set of components and indicating that the second set of components will require maintenance during the planned MRO task. The method further includes developing a plan for maintenance of individual items in the second set of components and, upon discovering a need for maintenance of at least one item of the second set of components, accessing the plan and integrating it with a plan of planned MRO tasks for the equipment. 
         [0013]    In another embodiment, the invention further provides a method for managing maintenance of equipment. The method includes discovering a component of the equipment requiring unplanned maintenance and identifying a location of the component. The method further includes identifying a category of work required for the unplanned maintenance, identifying a task description in the category of work to be performed, identifying a data code on the component, obtaining information from one or more databases associated with maintenance of said equipment, and scheduling the unplanned maintenance into a schedule of planned maintenance based on the information obtained from the one or more databases. 
         [0014]    In yet another embodiment, the invention further provides a system for managing the maintenance of equipment by integrating planned maintenance with unplanned maintenance. The system includes a network user interface in communication with a network and at least one storage device in communication with the network, the storage device being configured to store data from a plurality of databases. These databases in one embodiment include a Planned Work Probable Findings database including data of probability that, during planned maintenance of a first component, a second component will be identified as requiring unplanned maintenance, a Geography Definition database including data defining physical zones within which a repair task may be performed on a piece of equipment, a Planned Work Geography Locator database including data associating a planned MRO task to a physical zone, and a Component Tracking database including data selected from one or more of part numbers, component serial numbers and tracking numbers, the Component Tracking database being linked to a configuration database; and a scheduler for scheduling maintenance for a plurality of maintenance time periods; wherein the network user interface is configured to provide access to data from one or more database to describe a MRO task for a component of the equipment discovered to require maintenance; and wherein said scheduler includes logic to integrate the maintenance of the second component into a maintenance plan for said maintenance in a selected time period. 
         [0015]    In yet another embodiment, the invention further provides a method for managing maintenance of equipment. The method includes identifying a planned MRO task of the equipment and based on location of the planned MRO task, retrieving from a memory probable MRO tasks associated with the planned MRO task. 
         [0016]    In yet another embodiment, the invention further provides a computer readable equipment maintenance database storage medium. The storage medium includes first data defining planned maintenance items for equipment and second data defining probable maintenance items for the equipment. The second data is associated with the first data by geographic data for the equipment. 
         [0017]    In yet another embodiment, the invention further provides a method for forming an equipment maintenance database. The method includes identifying a planned MRO task for equipment and identifying one or more geographical areas of the equipment associated with completion of the planned MRO task. The method further includes determining unplanned MRO tasks associated with the one or more geographical areas and, in a database, storing first data related to the planned MRO task, storing second data related to the unplanned MRO tasks, and associating the first data and the second data by data related to the one or more geographical areas of the equipment. 
         [0018]    The foregoing summary has been provided only by way of introduction. Nothing in this section should be taken as a limitation on the following claims, which define the scope of the invention. 
     
    
     
       BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS 
         [0019]      FIG. 1  is a block diagram of a system for managing maintenance of equipment; 
           [0020]      FIG. 2  is a flow diagram illustrating one embodiment of a method of operating the system of  FIG. 1 ; 
           [0021]      FIG. 3  illustrates one embodiment of a planned work probable findings database of  FIG. 1 ; and 
           [0022]      FIG. 4  illustrates a question and response session gathering data to permit integration of unplanned work with a planned work schedule. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0023]    Referring now to the drawing,  FIG. 1  is a block diagram of a system  100  for managing maintenance of equipment. As used herein, equipment refers to a machine or machinery that is formed of a defined arrangement of multiple components. A component means a component, a sub-component, an assembly, a system, or any other part of an item of equipment. A component may include, but need not include, one or more sub-components. An assembly may comprise a group of components that are integrated together. A material refers to raw material, a consumable, a component, a provision, or other equipment-related resources related to the performance of a maintenance activity. A maintenance activity or a maintenance task refers to at least one of maintenance, repair and overhaul of an item of equipment or a component of the item. 
         [0024]    A component is not limited to mechanical elements and is broadly defined to include an electrical assembly, an electrical system, an electronic system, a computer controller, software, hydraulics, plumbing, and the like. Mechanical equipment includes heavy equipment and capital intensive equipment that is movable or fixed. Mobile mechanical equipment includes airplanes, buses, locomotives, ships, cranes, heavy trucks, earth moving equipment, and the like. Fixed mechanical equipment includes electrical power generators, industrial presses, manufacturing equipment or the like. 
         [0025]    The system  100  forms a system for managing the maintenance of equipment by integrating planned maintenance of the equipment with unplanned maintenance for the equipment. In one exemplary embodiment described herein, the system  100  may be used in conjunction with a maintenance, repair and overhaul (MRO) system for performing MRO work on equipment. In another exemplary embodiment, the system  100  is used by a provider of MRO services for airplanes such as military and commercial airplanes. However, the system is not so limited and may be used in conjunction with any type of equipment or system. 
         [0026]    The system  100  includes a computer network  102 , a user interface  104 , a server  106 , a storage device  108  and a scheduler  110 . The network  102  may be any suitable data communications network, such as a local area network, wireless network, etc. Many networking standards have been developed and may be adapted for application as shown in  FIG. 1  and described herein. 
         [0027]    The user interface  104  is in communication with the network  102  and provides access to data and applications located remotely on the network  102 . In the illustrative embodiment, the user interface  104  is embodied as a personal computer. In other embodiments, different types of data entry and data communication devices may be used. For example, in one alternative embodiment shown in  FIG. 1 , a wearable data communication device  112  is in communication with the user interface  104  by means of a wireless network  114 . The wearable communication device  112  forms a wireless data entry device in communication with other components of the network  102 . The wearable communication device  112  permits an operator such as a technician or mechanic to access remote locations of equipment undergoing MRO work while remaining in data communication with the network  102  but without the inconvenience of trailing data cables. Other types of data entry devices are known and may be adapted for use in the system  100 . 
         [0028]    The server  106  provides a process workflow and messaging device for the system  100 . The server  106  is in communication with the user interface  104 , the storage device  108  and the scheduler  110 . The server  106  may also provide data communication with other devices, such as other networks. 
         [0029]    The storage device  108  is in communication with other components of the network  102 . The storage device is configured to store data in a plurality of databases. These databases include a planned work probable findings database  116 , a planned work geography located database  118 , a work description library  120 , a geography definition database  122 , a standard repair library  124 , a standard parts list  126 , a component part and serial number database  128 , configuration databases  130  and possibly other databases  132 . The other databases  132  may store ancillary information such as data and applications for use by components such as the server  106  and the user interface  104  of the network. The content and creation of these databases along with their use for scheduling planned and unplanned MRO work will be described in more detail below. 
         [0030]    MRO work is organized by task. Examples of aircraft MRO tasks are “overhaul engine number 1,” or “inspect brake pads on nose landing gear.” Many MRO tasks are planned and scheduled according to a regular preventative maintenance schedule or other planning basis. For each planned MRO task, an analysis is performed to determine what types of additional, unplanned MRO work may be found during routine maintenance within the same geographical area of the equipment. Relative probabilities are assigned to those possible work events and the planned work probable findings database  116  is established from that analysis. One example of data organized in a planned work probable findings database is shown in  FIG. 3 . 
         [0031]    Defined categories of MRO work, such as mechanical, electrical, software, etc. are specified along with expected types of tasks relative to that category. For example, plumbing could be expected to have leaks of varying severity, including seepage, pooling, heavy volume, burst pipe, etc. As another example, structural failures could include task types such as corrosion, cracking, fastener loss and bending, etc. For each of these categories and tasks types, standard nomenclature is developed and category/task-type pairs are established. The resulting data is stored in the work description library database  120 . 
         [0032]    For each unplanned work category/task type pair identified in the work description library database  120 , a standard method of repair is established and associated data is stored in the standard repair library database  124 . This library, in one embodiment, includes task descriptions, basic required tool listings as well as any special processing notes, skills or certifications required for the task, including safety warnings. This database also includes both schedule span estimates and cost estimates of the effort required to accomplish the standard repair tasks. 
         [0033]    For each entry in the standard repair library database  124 , a generalized components list of the items forecast to be required to be perform a specified maintenance or repair task is established in the standard repair parts list library database  126 . This database may be organized by part numbers or nomenclature or both. In case of a database organized according to nomenclature only, various analysis techniques related to the context of the semantics used to describe the components may be applied to determined proper part applications for the various configurations. 
         [0034]    The equipment geography description database  122  stores data related to geographic zones or locations for all maintained areas of the end item of equipment. This may include detailed information about subareas, focused on defining where maintenance work has been located on the end item of equipment. For example, geography must be specified as “right-hand front fender—rear edge” or “left-hand forward wheel well—pump mount side.” Only those areas determined to be subject to frequent or expensive maintenance may be listed. Preferably, the geographic location descriptions are related to a user graphical interface allowing for rapid point-and-click data acquisition. That is, a user operating a pointer-type device in conjunction with a display device may find and identify a specific geographic location or zone quickly using a graphical user interface. In instances where industry regulatory entities have pre-established geographic areas or zones or sub-zones, such as the ATA zones specified by the Air Transport Association for commercial aircraft, utilization or cross references may made to those standards in the geographic description database  122 . An example of the ATA zones is provided herein as an appendix. 
         [0035]    The component part/serial number database  128  stores part numbers or component serial numbers or some other unique tracking number for components of the equipment. The configuration database  130  stores information about the configuration or interrelationship of the components and parts of the equipment. These databases may be accessed for additional information about equipment needing repair or replacement. 
         [0036]    While the several databases shown in  FIG. 1  and described herein are independent in this embodiment, other data storage embodiments may be used. The data associated with the respective databases may be combined or linked in one or more databases. Databases may be located together as shown or distributed about the network. Any suitable database management tool or applications may be used for managing and maintaining the databases. 
         [0037]    The scheduler  110  schedules maintenance for a plurality of maintenance time periods for equipment as part of the operation of the MRO system. As noted above, some MRO work occurs according to a schedule, such as routine preventative maintenance or overhaul work. Some MRO work may be planned but unscheduled, such as repairs. The scheduler  110  tracks work that must be performed over time against a calendar and using information about availability of other resources. 
         [0038]    The scheduler  110  is illustrated in  FIG. 1  as a computer in communication with the network  102  with access to the storage device  108  including its databases, the server  106  and user interface  104 . In other embodiments, the functionality provided by the scheduler  110  may be performed by other components of the system  100 . For example, a processor associated with the server  106  may perform the functions provided by the scheduler  110 . 
         [0039]    The scheduler receives data inputs regarding equipment on which maintenance is to be performed, the maintenance to be performed on the equipment, and resources available to perform the maintenance, such as parts and personnel. The scheduler may also receive other information such as availability of the equipment and planned maintenance schedules for the equipment. Using this information and other required information, the scheduler  110  develops a maintenance plan for maintenance in a selected time period for specified equipment. As will be described in greater detail herein, the scheduler  110  further receives information about unplanned work identified, for example, by a technician during inspection or performance of other work. The scheduler  110  integrates performance of the unplanned maintenance work into the maintenance plan for the equipment. 
         [0040]    It is to be noted that other embodiments of the system  100  may be substituted. The functionality provided by the system may be alternately provided by computation and data storage devices having any configuration which is suitable to the needs and purposes described herein. The configuration shown in  FIG. 1  is exemplary only and is intended to clarify the function of the various elements of the system described therein. 
         [0041]      FIG. 2  is a flow diagram illustrating one embodiment of a method for operating the system  100  of  FIG. 1 . The method illustrated in  FIG. 2  permits identification, categorization and integration of unplanned MRO work in a schedule for completion of planned MRO work. The method begins at block  200 . 
         [0042]    At block  202 , unplanned MRO work is discovered. This may occur at any point in the MRO work process. For example, the unplanned work may be discovered before the equipment is delivered for MRO processing. The MRO work may be discovered while planned MRO work is under way, for example, when the equipment has been opened up for access to a planned work area. 
         [0043]    In accordance with one embodiment, for each item of unplanned work discovered, an MRO technician or mechanic utilizes a computer input device to define the location of the work on the equipment. Two techniques for location definition are envisioned, and others may be implemented as well. In one technique, the location of the unplanned work is specified using the most relevant planned work definition, as specified in the probable findings database  116  ( FIG. 1 ), as will be described in greater detail below. Alternatively, the unplanned work can be specified through an assigned MRO geography definition. This definition may be obtained, for example, from the geography definition database  122  ( FIG. 1 ). In the example involving aircraft MRO work, this information may be specified in the format of standard codes and locations for aircraft specified by the Air Transport Association, shown in the appendix hereto. For example, those standard codes may be specified as a default definition database. If other definitions are specified, for example by a specific airline which operates an aircraft, the preferred definitions may be substitute for the standard, default codes and locations. 
         [0044]    Preferably, the location definition operation described by block  204  occurs when the technician clicks on an item on a menu. The menu may be presented to the technician by means of the user interface  104  or a device such as the wireless data communication device  112  in communication with the user interface  104 . It is envisioned that the user interface will provide an easy to navigate menu system for data entry and access by a technician, mechanic or other operator. The menus are preferably dynamic pop up or pull down menus, with menu selections varying with the context of the menu. Only appropriate menu choices are provided to the user depending on his current context or location in the menu system or level of operation. 
         [0045]    At block  206 , the operator specifies the geography/work pairing for the unplanned work items. Preferably, this is accomplished using a point and click menu system associated with a user interface. The menu system may be used to access or specify the particular geographical location of the equipment. The menu system may further be used to select or identify a particular item of unplanned MRO work to be completed at the specified geographical location. This task description selection is preferably based on a pull down menu of relevant information only, and a click-to-verify method for input. That is, once the geographical location has been identified by the operator, only the possible work tasks in that geographical location are made available by the menu system. If the operator specifies an area of the assembly where only hydraulic systems are located, only hydraulic work tasks will be displayed by the menu system. Other tasks, such as electrical tasks and airframes repair tasks, will be suppressed. 
         [0046]    At block  208 , the operator identifies and verifies the work category for the items of unplanned work. Preferably, different tasks are specified in different categories of work. For example, in the airplane repair context, categorization may assign tasks to categories such as hydraulics, electrical, airframe repair, etc. Categorization can be important to allow allocation of proper and necessary resources for completion of the planned and unplanned work. Alternatively, the tasks could be categorized by geography, specifying physical regions of the equipment under repair for categories to which work tasks may be assigned. 
         [0047]    At block  210 , a task description for the unplanned work tasks is identified and verified. Again, this is preferably accomplished using a pull down menu of relevant information, along with a click-to-verify method for input. Based on the information provided by the technician, the system responds with a pull down menu whose entries are limited to only relevant or proper entries. Irrelevant or improper entries are suppressed. 
         [0048]    At block  212 , component data is acquired by the system. In one embodiment, this is done by reading a data code from the device. The data code may be machine readable, such as a bar code or magnetic stripe or may be a part number or serial number attached to the device. The data code is a unique identifier of the device. In another embodiment, this is done by posing tailored questions to the operator to obtain the required information. The questions may be posed using a video entry device associated with the user interface of the system or with the wearable communication device. Alternatively, an audio interface may be provided. The questions are tailored to the type of MRO task already identified by the technician. In one example, the following questions may be transmitted to the operator for data entry. 
         [0049]    Does the item to be maintained have a digital media (bar code/magnetic stripe, etc.) attached? If yes, input the information by scanning it now. 
         [0050]    If no such media identifier exists, input the serial number printed or stamped on the item, or input “no” if none exists. 
         [0051]    Should the item be removed for further work, yes/no. 
         [0052]    Additional tailored questions may be asked as required. 
         [0053]    At this point, the answers to the tailored questions along with other data entered by the operator have provided the system with sufficient information to draw inferences as to the next steps required. Any appropriate or available application may be employed to perform necessary logical operations to process the input information. The system can accordingly initiate required transactions in support of those next steps. 
         [0054]    The information provided by the operator and obtained from the storage device of the system allows the system to fully identify and describe the unplanned work task. At block  214 , the system establishes an unplanned task data record, which may be located in a portion of memory for storing data related to the unplanned task. At block  216 , the system determines a time span/cost estimate for the unplanned task. The time and cost estimates may be based on prior art data or experience performing similar unplanned work. At block  218 , the system orders the necessary support for the task. Examples of required support include components for repair and replacement, information such as directions, and personnel. 
         [0055]    At block  220 , the unplanned work is sequenced into the planned work sequence to produce a revised work plan. This forms the preparation of an integrated schedule including the original work tasks and the newly discovered tasks. After producing the revised work plan, the method illustrated in  FIG. 2  terminates at block  222 . Additional or alternate actions may be taken in other embodiments. 
         [0056]    It may happen that the system cannot develop the necessary described linkages. In that case, a transaction is produced by the system to a maintenance control area for further analysis or engineering assistance. In all cases, the unplanned work is fully identified, categorized and integrated to the total work plan prior to executing the repair task. This reduces or eliminates the uncertainty and variability formerly associated with unplanned MRO work. 
         [0057]      FIG. 3  illustrates one embodiment of the planned work probable findings database. The database  116  is preferably contained on a storage medium such as a hard-disk drive, semiconductor memory or other electronic storage. The storage device or storage medium forms a computer readable equipment maintenance database storage medium. The database includes first data defining planned maintenance items for equipment and second data defining probable maintenance items for the equipment. The second data are associated with the first data by geographic data for the equipment. 
         [0058]    In the embodiment illustrated in  FIG. 3 , the first data are organized as a series of planned MRO tasks  302 ,  304 ,  306 . A task pointer  308  points to one of their designated tasks. Only three MRO tasks are shown in  302 ,  304 ,  306   FIG. 3  but the database  116  may contain any number of tasks. Associated with each planned MRO tasks  302 ,  304 ,  306  are one or more probable maintenance items. Thus, associated with a first plan MRO task  302  are a first probable MRO task  310 , a second probable MRO task  312 , and a third probable MRO task  314 . Any number of probable MRO tasks may be associated with each planned MRO task.  FIG. 3  is exemplary only. 
         [0059]    Linking the planned MRO tasks and the probable maintenance items is location data. The location data defines the physical or geographical location of the equipment where the components associated with the planned maintenance and probable maintenance may be found. The location for respective probable maintenance items associated with a common planned MRO task may vary. A location pointer  316  points to the currently accessed location in the database. Thus, this database may be considered a two-sided database. 
         [0060]    Two-way operation of the database  116  may occur as follows. The database may be accessed using any suitable database management system or other user interface. Preferably, in the embodiment of  FIG. 1 , a pull down menu system is used to display data from the database  116 . By pointing and clicking with a pointer-type device, for example, the task pointer  308  or the location pointer  316  may be moved to select different database entries. By specifying a planned MRO task as indicated by the task pointer  308 , all probable maintenance items associated with that planned MRO task can be located. Similarly, by specifying a geographic location using the location pointer  316  into the database  116 , all planned maintenance such as planned MRO task  302  and probable or unplanned maintenance items such as tasks  310 ,  312 ,  314  associated with that location can be identified. 
         [0061]    It should be noted that there may be several different location entries which may be associated with a single planned MRO task  302 ,  304 ,  306 . For example, in the airplane context, if the planned MRO task  302  is described as “inspect air conditioning air ducts,” such ducts run the length of the plane, in a plurality of locations. Each separate location may have a separate probable MRO task  312 ,  312 ,  314  associated therewith. 
         [0062]    The planned work geography locator database  116  can be formed in any suitable method. In one embodiment, this database is formed by identifying a planned MRO task for particular equipment and identifying one or more geographical areas of the equipment associated with completion of the planned MRO task. Subsequently, unplanned MRO tasks are identified which are associated with the one or more geographical areas. For example, a planned MRO task may be identified as “inspect left wing hydraulic lines.” The geographical areas for the airplane associated with this MRO task may be identified as the left wing and individual components and spaces thereof. An example of unplanned MRO tasks associated with the one or more geographical areas is “left wing airframe damage” or “worn electrical cables in left wing.” 
         [0063]    The method for forming the equipment maintenance database further includes storing in a database first data related to the planned MRO task. This data may define, for example, an element or component requiring maintenance and the particular maintenance to be performed. The method further includes storing second data in the database, the second data related to the unplanned MRO tasks which have been identified for the geographical areas associated with the planned MRO task. The method still further includes associating the first data and second data by geographic data related to one or more geographical areas of the equipment. In one example, the geographical data may be data related to the codes established by the Air Transport Association industry organization to define an standard reference characteristic the geographical locations of an airplane. Examples of these codes are included herewith as an Appendix. 
         [0064]      FIG. 4  illustrates a tailored question and response session between the system of  FIG. 1  and an operator to gather data to permit integration of unplanned work tasks with a planned work schedule. At block  402 , the operator is prompted to identify the item for maintenance. At block  404 , the data entered by the operator is received. At block  406 , the operator is asked if the specified item should be removed for further work. A response input is received at block  408 . If a yes response is received, block  410 , the operator is asked if a special fixture is required at block  412 . A yes or no response is received at block  414 . 
         [0065]    At block  416 , the operator is prompted to enter a required time for completion of the unplanned MRO task. A response is received at block  418 . In addition, in one embodiment, external data is also received related to timing and duration of maintenance work. In one example, some airlines specify a very short turnaround time, meaning the duration from arrival of an airplane at an airport gate until subsequent departure of the plane on a next flight from the gate. Some airlines specify a turnaround time of 20 minutes. Other airlines specify a turnaround time of, for example, one hour. This information may be used, in conjunction with the data entered at block  418  to schedule the unplanned maintenance. Thus, if the data entered requires less than one hour for completion, and the turnaround time received at block  420  is an hour or more, the system may conclude that this unplanned work item may be completed during a turnaround process, assuming personnel and the equipment required for the task are available. 
         [0066]    At block  422  the operator is prompted for a need for evaluation of the completed work. A response is received at block  424 . At block  426 , the operator is asked if an engineer is required for completion of the task. A response is received at block  428 . At block  430 , the operator is asked if quality assurance personnel are required for completion of the work item. A response is received at block  432 . At block  434 , the operator is asked if a lead technician or mechanic is required for completion of the task. A response is received at block  436 . 
         [0067]    Other questions may be asked of the operator based on the location and nature of the unplanned work to be performed and based on other information provided in the responses to the questions. The questions may be viewed as a tree, where the branch taken in the tree by the system is dependent upon the input received from the operator. Any number of questions may be generated depending upon the responses provided by the operator. Preferably, the number of questions is limited to the range of six to ten questions which are fairly general in nature for ready response by the operator. 
         [0068]    From the foregoing, it can be seen that the present invention provides method and apparatus for identification, categorization and integration of unplanned MRO work in an MRO work schedule. A technician identifies location of the unplanned work and answers tailored questions posed by the system to obtain additional information about the nature of the work. Using this information, the system identifies and describes the unplanned work tasks and modifies the schedule for planned maintenance work to include the identified unplanned work. In this manner, the required components, information, tooling and personnel to perform the tasks, both unplanned and planned tasks, may be scheduled for efficient utilization and completion of the work schedule. 
         [0069]    While a particular embodiment of the present invention has been shown and described, modifications may be made. It is therefore intended in the appended claims to cover such changes and modifications which follow in the true spirit and scope of the invention. 
         [0000]    
       
         
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
             
               
               
             
               
               
             
               
               
             
               
             
               
               
             
               
             
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
               
             
               
             
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
             
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
               
               
             
               
             
               
               
             
           
               
                 APPENDIX 
               
               
                   
               
             
             
               
                 ATA CODES 
               
             
          
           
               
                 05 MTC CHECKS 
                 22 AUTO FLIGHT 
               
               
                 10 Time Limit 
                 10 Auto Pilot &amp; Flight Director * 
               
               
                 20 Scheduled Checks 
                 Pitch/Roll/Annunciation 
               
               
                 21 Trans Check 
                 20 Speed-Attitude Correction 
               
               
                 23 #1 Layover 
                 YAW Damp 
               
               
                 25 #2 &amp; ER Layover Checks 
                 Speed/Mach or Pitch Trim 
               
               
                 50 Unscheduled Checks 
                 Stability Augmentation 
               
             
          
           
               
                   
                 Hard Landing 
                 30 AutoThrottle 
               
               
                   
                 Turbulent Air 
                 Thrust Management 
               
               
                   
                 Lightning Strike 
                 40 System Monitor 
               
               
                   
                 Over-weight Landing 
                 MCDP 
               
               
                   
                 Bird Strike 
                 DLC/Auto Ground Spoilers 
               
             
          
           
               
                   
                 Pre-Ferry Inspection 
                 (L 1011 only) 
               
             
          
           
               
                 21 AIR CONDITIONING 
                 70 Aerodynamic Load Alleviating 
               
               
                 10 Compression 
                 Active Control System 
               
               
                 20 Distribution 
                 23 COMMUNICATIONS 
               
             
          
           
               
                   
                 Conditioned Air Ducts 
                 10 VHF 
               
               
                   
                 Lav/Galley Vent System 
                 20 VHF and UHF 
               
             
          
           
               
                   
                 Recirculation Fan System 
                 SELCAL 
               
             
          
           
               
                   
                 Gasper 
                 30 Passenger Address 
               
             
          
           
               
                   
                 Equipment Cooling 
                 and Entertainment 
               
             
          
           
               
                 30 Pressurization 
                 Audio and Video 
               
             
          
           
               
                   
                 Control &amp; Indication 
                 Tape Recorders 
               
             
          
           
               
                   
                 ReliefValves 
                 35 Sky Radio 
               
             
          
           
               
                 40 Heating 
                 40 Interphone 
               
             
          
           
               
                   
                 Cargo Heat 
                 Cabin and Service 
               
             
          
           
               
                   
                 Floor/Foot/Shoulder Heat 
                 50 Audio Integrating 
               
             
          
           
               
                   
                 Hot Air Manifold Heat 
                 Flight Interphone 
               
             
          
           
               
                 50 Cooling 
                 Cockpit Microphones/Headsets 
               
             
          
           
               
                   
                 Air Cycle Machine 
                 and Loudspeakers 
               
             
          
           
               
                   
                 ACM Control &amp; Ind.(ACM Only) 
                 60 Static Discharge 
               
               
                   
                 ACM Valves 
                 70 Voice Recorder 
               
               
                   
                 ACM Controller 
                 80 ACARS 
               
             
          
           
               
                 60 Temp. Control 
                 90 Air to Ground Telephones 
               
             
          
           
               
                   
                 Zone Temp. Controller 
                 (Airfone, Satcom) 
               
             
          
           
               
                   
                 Zone Trim System 
                 91 ARINC 629 
               
               
                   
                 Compartment &amp; Zone Ind. 
                 93 Overhead Panel ARINC 
               
             
          
           
               
                 70 Humidity Regulation 
                 System (OPAS) 
               
             
          
           
               
                 73 Ozone Control 
                 94 Onboard Local Area 
               
             
          
           
               
                   
                 Network (OLAN) 
               
             
          
           
               
                 24 ELECTRICAL POWER 
                 27 FLIGHT CONTROLS 
               
             
          
           
               
                   
                 09Electrical Load Management 
                 02 Primary Flight Controls 
               
             
          
           
               
                   
                 System (ELMS) 
                 03 High Lift Control System 
               
             
          
           
               
                 10 Generator Drive CSD and IDG 
                 10 Ailerons 
               
             
          
           
               
                 20 AC Generation 
                 Aileron Trim 
               
             
          
           
               
                   
                 Generators 
                 Control Wheel 
               
               
                   
                 Generator Control Panels 
                 Aileron Pos. Indication 
               
             
          
           
               
                   
                 Indication (AC) 
                 20 Rudder 
               
             
          
           
               
                 30 DC Generation 
                 Rudder Trim 
               
             
          
           
               
                   
                 Transformation Rectifiers 
                 Rudder Pedals 
               
               
                   
                 Battery and Battery Charging 
                 Rudder Indication 
               
             
          
           
               
                   
                 Indication (AC) 
                 30 Elevator 
               
             
          
           
               
                 35 Flight Control D/C Power 
                 Elevator Feel 
               
               
                 40 External Power 
                 Control Column 
               
             
          
           
               
                   
                 Bus Power Control Unit 
                 Elevator Indication 
               
             
          
           
               
                 50 Electrical Distribution 
                 40 Horizontal Stabilizer 
               
             
          
           
               
                   
                 Ground Service 
                 Stabilizer Trim 
               
               
                   
                 Utility Buses 
                 Stabilizer Pos. Indication 
               
             
          
           
               
                   
                 Generator/Bus Tie Breakers 
                 50 Flaps 
               
             
          
           
               
                 25 EQUIPMENT &amp; FURNISHINGS 
                 Asymmetry Control 
               
               
                 10 Flight Compartment 
                 Load Relief 
               
               
                 20 Passenger Compartment 
                 Flap Pos. Indication 
               
             
          
           
               
                 25 Cabin Maintenance Visit 
                 60 Spoilers/Speedbrakes 
               
             
          
           
               
                 30 Buffet and Galley 
                 Spoiler Pos. Indication 
               
             
          
           
               
                   
                 Service Areas 
                 70 Gust Lock 
               
               
                   
                 Ovens/Chillers/Dispensers 
                 80 Leading Edge Lift Augmenting 
               
             
          
           
               
                   
                 Carts 
                 Leading Edge Slats/Flaps or Slots 
               
               
                   
                 Elevators or Lifts 
                 Auto Slat Extension System 
               
             
          
           
               
                 40 Lavatories 
                 Asymmetry Control 
               
               
                 50 Cargo and Accessory 
                 Slat or Flap Pos. Indication 
               
             
          
           
               
                   
                 Compartments 
                 28 FUEL 
               
             
          
           
               
                   
                 Cargo Loading Systems 
                 10 Storage 
               
             
          
           
               
                 60 Emergency Equipment 
                 20 Distribution 
               
             
          
           
               
                 88 Cabin Cleaning Operation 
                 Plumbing 
               
               
                 26 FIRE PROTECTION 
                 Pumps 
               
               
                 10 Detection 
                 Valves 
               
             
          
           
               
                   
                 Fire/Overheat or Smoke 
                 30 Dump 
               
             
          
           
               
                 20 Extinguishing 
                 40 Indicating 
               
             
          
           
               
                   
                 Fixed or Portable Extinguishers 
                 Quantity 
               
             
          
           
               
                 30 Explosion Suppression 
                 Temperature 
               
             
          
           
               
                   
                 Fuel System Protection 
                 Pressure 
               
             
          
           
               
                 29 HYDRAULIC POWER 
                 32 LANDING GEAR 
               
               
                 10 Main 
                 10 Main Gear and Doors 
               
               
                 20 Auxiliary 
                 20 Nose Gear and Doors 
               
             
          
           
               
                   
                 Emergency or Standby 
                 30 Extension and Retraction 
               
             
          
           
               
                   
                 RAT 
                 Actuators and Control System 
               
             
          
           
               
                 30 Indication 
                 Latches and Locks 
               
             
          
           
               
                   
                 Quantity 
                 Truck Positioning (Tilt) 
               
             
          
           
               
                   
                 Temperature 
                 40 Wheels and Brakes 
               
             
          
           
               
                   
                 Pressure 
                 Wheel Assemblies 
               
             
          
           
               
                 30 ICE &amp; RAIN PROTECTION 
                 Parking Brakes 
               
               
                 10 Airfoil 
                 42 Anti-skid System, Autobrakes 
               
               
                 20 Air Intakes 
                 43 Tire Foreign Object Damage 
               
             
          
           
               
                   
                 Cowl Anti-icing 
                 (Puncture Damage) 
               
             
          
           
               
                 30 Pitot and Static 
                 50 Steering 
               
               
                 40 Windshields and Windows 
                 60 Position and Warning 
               
             
          
           
               
                 50 Antennas and Radomes 
                 Landing Gear/Supplementary Gear 
               
               
                 60 Propellers/Rotors 
                 and Gear Door Warning and 
               
               
                 70 Water Lines 
                 Indication System 
               
             
          
           
               
                   
                 Supply and Drain 
                 Proximity Switch Electronic Unit 
               
             
          
           
               
                 80 Detection 
                 70 Supplementary Gear 
               
             
          
           
               
                   
                 Ice Detector and Annunciation 
                 Tail Skid 
               
             
          
           
               
                 31 INSTRUMENTS 
                 33 LIGHTS 
               
               
                 09 System Card Files 
                 10 Flight Compartment 
               
               
                 10 Panels 
                 20 Passenger Compartment 
               
             
          
           
               
                 20 Independent Instruments 
                 Galley and Lavatories 
               
             
          
           
               
                   
                 Clocks 
                 Sign Illumination 
               
             
          
           
               
                 30 Recorders 
                 30 Cargo and Service Compartments 
               
             
          
           
               
                   
                 Flight Recorders/FDAU 
                 40 Exterior Lighting 
               
             
          
           
               
                 35 Aircraft Conditioning 
                 50 Emergency Lighting 
               
             
          
           
               
                   
                 Monitoring System (ACMS) 
                 Flashlights 
               
             
          
           
               
                 40 Computers 
               
             
          
           
               
                   
                 Engine Indicating Crew 
               
             
          
           
               
                   
                 Alerting System (EICAS) 
               
             
          
           
               
                   
                 Multi-Acquisition Processor (MAP) 
               
             
          
           
               
                 41 Airplane Information 
               
             
          
           
               
                   
                 Management System (AIMS) 
               
             
          
           
               
                 50 Central Warning 
               
             
          
           
               
                   
                 Aural Warning 
               
               
                   
                 Takeoff/Landing Warning 
               
             
          
           
               
                 34 NAVIGATION 
                 38 WATER/WASTE 
               
               
                 10 Flight Environment Data 
                 10 Portable 
               
             
          
           
               
                   
                 Pilot and Static Systems 
                 Storage 
               
               
                   
                 Altitude/Altitude Alert 
                 Distribution 
               
               
                   
                 A/S and Over-speed Warning 
                 Quantity Ind. 
               
             
          
           
               
                   
                 V/S 
                 30 Waste Disposal 
               
             
          
           
               
                   
                 Air Data Computers 
                 Wash Basins 
               
               
                   
                 Stall Warning 
                 Water Closets 
               
               
                   
                 Air Temperature 
                 Flushing Systems 
               
             
          
           
               
                 20 Attitude and Heading 
                 40 Air Supply 
               
             
          
           
               
                   
                 Electronic Flight Instrument Systems 
                 Tank Pressurization 
               
             
          
           
               
                   
                 Attitude Indicator Systems 
                 45 CENTRAL FAULT DISPLAY 
               
             
          
           
               
                   
                 Magnetic Heading Systems 
                 SYSTEM 
               
               
                   
                 Directional and Vertical Gyros 
               
             
          
           
               
                   
                 Turn and Bank 
                 49 AIRBORNE AUXILIARY POWER 
               
               
                   
                 Standby Horizon 
                 10 Power Plant 
               
             
          
           
               
                   
                 Air Data Inertial Reference System 
                 Mounts 
               
             
          
           
               
                   
                 (ADIRS) 
                 Fireseals 
               
             
          
           
               
                 30 Landing and Taxi Aids 
                 Electrical Harness 
               
             
          
           
               
                   
                 ILS and Marker Beacon Systems 
                 Intake 
               
               
                   
                 Radio Altimeter System 
                 Drains 
               
             
          
           
               
                   
                 Monitor/Comparators 
                 20 Engine 
               
             
          
           
               
                 40 Independent Position Determining 
                 Accessory Gearbox 
               
             
          
           
               
                   
                 INS or IRU 
                 30 Engine Fuel and Control 
               
             
          
           
               
                   
                 Weather Radar 
                 Electronic Controller 
               
             
          
           
               
                   
                 Ground Proximity Warning System 
                 40 Ignition and Starting 
               
             
          
           
               
                 “Collision Avoidance (TCAS, Windshear)” 
                 Starter 
               
             
          
           
               
                 50 Dependent Position Determining 
                 50 Air 
               
             
          
           
               
                   
                 ADF - ATC - VOR 
                 Accessory Cooling 
               
               
                   
                 OMEGA - DME - GPS 
                 Pneumatic Supply 
               
             
          
           
               
                 60 Flight Management 
                 60 Engine Controls 
               
             
          
           
               
                 35 OXYGEN 
                 Emergency Shutdown 
               
             
          
           
               
                 10 Crew 
                 70 Engine Indicating 
               
             
          
           
               
                 20 Passenger 
                 Speed and Temperature 
               
             
          
           
               
                 30 Portable 
                 80 Exhaust 
               
               
                 36 PNEUMATIC 
                 90 Oil 
               
             
          
           
               
                 10 Distribution 
                 Storage 
               
             
          
           
               
                   
                 Control System 
                 Distribution 
               
               
                   
                 Ducts 
                 Indication 
               
             
          
           
               
                 20 Indication 
               
             
          
           
               
                   
                 Temp and Pressure (duct) 
               
             
          
           
               
                 52 DOORS 
                 54 NACELLES/PYLONS 
               
               
                 10 Passenger/Crew 
                 10 Main Frame 
               
             
          
           
               
                   
                 Steps 
                 Pylon/Strut 
               
               
                   
                 Actuation 
                 Keels 
               
             
          
           
               
                 20 Emergency Exits 
                 30 Plates/Skins 
               
             
          
           
               
                   
                 Emergency Actuation System 
                 Access Covers 
               
             
          
           
               
                 30 Cargo 
                 40 Attach Fittings 
               
             
          
           
               
                   
                 Doors and Actuation System 
                 Thrust Reverser 
               
             
          
           
               
                 40 Service 
                 Attach Fittings 
               
             
          
           
               
                 50 Fixed Interior 
                 50 Fillets/Fairings 
               
             
          
           
               
                   
                 Flight Compartment 
                 Pylon to Wing/Eng Fairing 
               
             
          
           
               
                   
                 Lavatory 
                 55 STABILIZER 
               
             
          
           
               
                 60 Entrance Stairs 
                 10 Horizontal 
               
             
          
           
               
                   
                 Actuation 
                 Plates/Skin 
               
             
          
           
               
                   
                 Control and Indication 
                 20 Elevator 
               
             
          
           
               
                 70 Door Warning 
                 Plates/Skin 
               
             
          
           
               
                   
                 Passenger/Service Accessory 
                 Balance Devices 
               
             
          
           
               
                   
                 Compt. And Stairs Ind. 
                 Tabs 
               
             
          
           
               
                   
                 Code Landing Gear Doors 
                 30 Vertical 
               
             
          
           
               
                   
                 Under Chp. 32 
                 Plates/Skin 
               
             
          
           
               
                 53 FUSELAGE 
                 40 Rudder 
               
             
          
           
               
                 10 Main Frame 
                 Plates/Skin 
               
             
          
           
               
                   
                 Bulkheads and Keels 
                 Balance Devices 
               
             
          
           
               
                 20 Auxiliary Structure 
                 Tabs 
               
             
          
           
               
                   
                 Floors 
                 50 Attach Fittings 
               
             
          
           
               
                   
                 Fixed Partitions 
                 Horizontal and Vertical Stab/Elev 
               
             
          
           
               
                 30 Plates and Skins 
                 and Rudder Component 
               
             
          
           
               
                   
                 Doublers 
                 56 WINDOWS 
               
             
          
           
               
                 40 Attach Fittings 
                 10 Flight Compartments 
               
             
          
           
               
                   
                 Door/Gear/Wing and Engine 
                 20 Cabin 
               
             
          
           
               
                   
                 Pylon Attach Fittings 
                 30 Door 
               
             
          
           
               
                   
                 Seat Tracks 
                 40 Inspection and Observation 
               
             
          
           
               
                 50 Aerodynamic Fairings 
               
             
          
           
               
                   
                 Fillets 
               
               
                   
                 Radome/Tail Cone 
               
             
          
           
               
                 57 WINGS 
                 72 ENGINE 
               
               
                 10 Main Frame 
                 10 Reduction Gear and Shaft 
               
             
          
           
               
                   
                 Primary Structure 
                 (Turbo-prop) 
               
             
          
           
               
                 20 Auxiliary Structure 
                 20 Air Inlet Section 
               
             
          
           
               
                   
                 Leading/Trailing Edge 
                 Fan Case 
               
               
                   
                 Wing Tips 
                 Guide Vanes (Fixed) 
               
             
          
           
               
                   
                 Fairing/Fillets 
                 30 Compressor Section 
               
             
          
           
               
                 30 Plates/Skin 
                 Compressor - Front/Intermediate/Rear 
               
               
                 40 Attach Fittings 
                 Diffuser Case 
               
             
          
           
               
                   
                 Pylon/Control Surface and Landing 
                 39 Compressor Stall 
               
             
          
           
               
                   
                 Gear Attach Fittings 
                 40 Combustion Section 
               
             
          
           
               
                 50 Flight Surfaces 
                 Burner Cans 
               
             
          
           
               
                   
                 Ailerons and Tabs 
                 Combustion Chamber and Ducts 
               
               
                   
                 Spoilers 
                 Case 
               
             
          
           
               
                   
                 Flaps 
                 50 Turbine Section 
               
             
          
           
               
                   
                 Leading Edge Lift Devices 
                 Turbine Nozzles/Rotors/Cases 
               
             
          
           
               
                 71 POWERPLANT 
                 Exhaust Section 
               
             
          
           
               
                 03 Foreign Object Damage (FOD) 
                 60 Accessory Drive Section 
               
             
          
           
               
                 10 Cowling 
                 Engine Mounted Gearbox 
               
             
          
           
               
                   
                 Inlet 
                 70 By Pass Section 
               
             
          
           
               
                   
                 Accessory 
                 Fan Exist Case 
               
               
                   
                 Core 
                 Air Bleed Manifolds 
               
             
          
           
               
                 20 Mounts 
                 73 ENGINE FUEL &amp; CONTROL 
               
             
          
           
               
                   
                 Engine to Pylon 
                 10 Distribution 
               
             
          
           
               
                 30 Fire Seals 
                 Pumps 
               
             
          
           
               
                   
                 Power Plant Mounted 
                 Filters 
               
             
          
           
               
                 40 Attach Fittings 
                 Nozzles 
               
             
          
           
               
                   
                 Power Plant Accessory Attach 
                 Valves 
               
             
          
           
               
                 50 Electrical Harness 
                 Tubes 
               
             
          
           
               
                   
                 Wiring Disconnected and Removed 
                 20 Controlling 
               
             
          
           
               
                   
                 with Engine 
                 Fuel Control 
               
             
          
           
               
                 60 Variable Air Intakes 
                 Electronic Engine Control (FADEC) 
               
               
                 70 Engine Drains 
                 Thrust Lever Resolvers 
               
               
                 98 Max Power Takeoff 
                 EEC Alternator 
               
             
          
           
               
                   
                 MAX Power T/O (L1011-1 and 
                 Propulsion Discrete Interface Unit 
               
             
          
           
               
                   
                 MD 88/90) 
                 30 Indication 
               
             
          
           
               
                   
                 NORM Power T/O (B 767 Domestic 
                 Fuel Flow 
               
             
          
           
               
                   
                 W/PW 4060) 
                 Fuel Temp 
               
             
          
           
               
                   
                 ARTS Fired (MD88) 
                 Engine Pump Fuel Press 
               
             
          
           
               
                   
                 Filter Bypass 
               
             
          
           
               
                 74 IGNITION 
                 77 ENGINE INDICATING 
               
               
                 10 Elect Power Supply Exciter 
                 10 Power 
               
             
          
           
               
                 20 Distribution 
                 EPR 
               
             
          
           
               
                   
                 Ignition Lead 
                 Tachometer (N1/N2/N3) 
               
               
                   
                 Igniter Plug 
                 Engine Synch 
               
             
          
           
               
                 30 Switching 
                 20 Temperature 
               
             
          
           
               
                   
                 Ignition Control Circuit 
                 EGT/TGT 
               
             
          
           
               
                 75 AIR 
                 30 Analyzers 
               
             
          
           
               
                 10 Engine Anti-icing 
                 Airborne Vibration Monitor 
               
             
          
           
               
                   
                 Cowl Anti-icing Code Under 
                 Electronic Engine Control Monitor 
               
             
          
           
               
                   
                 Chp. 30 
                 78 EXHAUST 
               
             
          
           
               
                 20 Accessory Cooling 
                 10 Collector/Nozzle 
               
             
          
           
               
                   
                 Ducts and Tubing 
                 20 Noise Suppressor 
               
             
          
           
               
                   
                 Generator Cooling 
                 (exhaust gas noise only) 
               
             
          
           
               
                   
                 Bearing Cooling 
                 30 Thrust Reverser 
               
             
          
           
               
                   
                 Ignition Cooling 
                 Fan/Turbine Reverser 
               
               
                   
                 Active Clearance Control 
                 Control System 
               
             
          
           
               
                   
                 (Case cooling) 
                 Indication System 
               
             
          
           
               
                   
                 Turbine Cooling 
                 79 OIL 
               
             
          
           
               
                 30 Compressor Control 
                 10 Storage 
               
             
          
           
               
                   
                 Variable Stator Vanes 
                 Engine Tank 
               
               
                   
                 Bleed Valves 
                 20 Distribution 
               
             
          
           
               
                   
                 Actuator (VSV) 
                 Engine Lubricating System 
               
             
          
           
               
                 40 Indication 
                 30 Indication 
               
             
          
           
               
                   
                 Engine Air Control System 
                 Quantity 
               
               
                   
                 Indication 
                 Temperature 
               
             
          
           
               
                 76 ENGINE CONTROLS 
                 Pressure 
               
             
          
           
               
                   
                 (Use 2230 for Autothrottles) 
                 Filter Bypass 
               
             
          
           
               
                 10 Power Controls 
                 80 STARTING 
               
             
          
           
               
                   
                 Levels 
                 10 Cranking 
               
             
          
           
               
                   
                 Cables 
                 Starter System 
               
             
          
           
               
                   
                 Bell Cranks 
                 99 MISCELLANEOUS 
               
             
          
           
               
                   
                 Tension Regulators 
                 Board Forms 
               
             
          
           
               
                 20 Emergency Shutdown 
               
               
                 “Engine”“T”“Handle” 
               
             
          
           
               
                   
                 Shutdown Circuits