Joint Appendix A. Logging Codes
Joint Appendix A Logging Codes
We maintain 6000.15, Appendix A and 6040.15, Appendix A together electronically below.
Order 6000.15J signed 06/07/2022, Change 1 signed on 12/14/2023, and Order 6040.15H signed 06/01/2018. The published appendix on the web is official. The NAS Operations Policy Team, AJW-183, maintains the logging codes used in the Remote Monitoring and Logging System (RMLS) Applications.
These codes are categorized for activities generally performed by maintenance personnel or Control Center personnel:
Administrative Code Categories 0 through 10 in Table 1 are Administrative Codes and their associated supplemental codes used by maintenance personnel.
Maintenance Code Categories 41 through 59 in Table 2 are Maintenance Codes and their associated supplemental codes used by maintenance personnel.
Scheduled Interruption Code Categories 60 through 79 in Table 3 are causes for scheduled interruptions and their associated supplemental codes used by Control Center personnel.
Unscheduled Interruption Code Categories 80 through 99 in Table 4 are causes for unscheduled interruptions and their associated supplemental codes used by Control Center personnel.
Maintenance Action Codes (MAC) in Table 5 indicate the status of the activity.
Personnel responsible for maintaining a technical order library may print this appendix from the web and insert it into Order 6000.15 or 6040.15 at anytime.
List of Appendix A Tables.
Table 1. Administrative Code Category
Table 2. Maintenance Code Category
Table 3. Scheduled Interruption Code Category
Table 4. Unscheduled Interruption Code Category
Table 5. Maintenance Action Codes (MAC)
Table 1. Administrative Code Category
Code Category | Administrative Activities | Description | Supplemental Codes |
|---|---|---|---|
| 0 | Administrative | Continue to use for Tech Request done in SAL | None |
| 1 | Supervisory Reviews | 0-Reserved 1-Reserved 2-Technical Performance Record (TPR) Review only 3-Facility Reference Data Review only 4-TPR and FRD Review | |
| 2 | *Coordination | ** New in CHG2: Supp Code "N" and "S" (LOA Effective 05/13/2025). ***Removed in CHG2, requested by Maintenance Efficiency Workgroup (MEW) enacted via LOA dated 5/30/2026. | ***0-Reserved (Was Non Interruption Coordination) 1-Initial Coordination done verbal or in TAP. 2-Final Coordination 3-RTS Coordination *A-Air Traffic Outage Report (ATOR) C-Combined Initial & Final Coordination E-Extend an Interruption **N-Telco No Show (Add in CHG2) R-Coordination Refused **S-Status Update for Interruption (Add in CHG2) ***T-Reserved (Was Technician on Site (ToS)) Coordination (For Control Center Use) ***U-Reserved (Was Unscheduled Interruption Coordination) |
| 3 | Aircraft Accident/Incident | None | |
| 4 | Commissioning | None | |
| 5 | Decommissioning | None | |
| 6 | Install/Special Project | 6-Order Parts | |
| 7 | Radio Frequency Interference | None | |
| 8 | Vandalism | To document actions taken in response to vandalism events. | |
| 9 | Performance Exam | None | |
| 10 | Site Arrival/Departure | None |
Table 2. Maintenance Code Category
Code Category | Administrative Activities | Description | Supplemental Codes |
|---|---|---|---|
| 41 | Verification (Non-Fed) | None | |
| 50 | Periodic Maintenance | **Added 6/12/2025 for Smart Facility Pilot Program | 0-Other or Null 1-Non-FAA Circuits **2-PM Completed Remotely using Smart Facility Tool 6-Order Parts 7-Reset or Initialization S-Safety Related Check (Safety of Flight) F-Facility Power & Support Systems R-PM Completed Remotely Through RMM |
| >51 | Certification | 0-Other or Null S-Reserved G-Reserved A-Reserved C-Reserved F-Reserved M-Reserved P-Reserved R-Reserved | |
| 52 | Decertification | None | |
| 53 | Flight Inspection | ***New in CHG2 | ***1-Flight Inspection Requested (TBD) ***2-Flight Inspection Supportable (TBD) |
| 54 | Inspections *SSM-RMLS-083 | *New Supplemental Codes added in Revision J | *A-Acceptance (JAI/CAI) *D-Damage Assessment *N-Non Fed *Q- Quality Control (QC) *R-Routine *S-Safety *T-Technical Evaluations *Z-Other |
| 55 | PM Not Performed | 0-Other or Null 1-Non-FAA Circuit S-Safety Related Check F-Facility Power & Support Systems | |
| 56 | Modification | *H added in Rev H **T Added in 6032.1E Revision *** Will Add in 6032.1F | N-National Team Assignment/Non-Standard Issuance S-Safety C-Critical for NAS Operations **T-Time Critical 0-Standard M-Mod on Failure/OTS P-Phased Implementation *H-Removed Mod On Hold ***1-Coordinated Implementation 2-Local Adaptation Change 3-Local Chart or Map Update ***4-National Adaptation Charts and Maps |
| 57 | Remote Monitoring | Auto generated by RMM | None |
| 58 | Corrective Maintenance ****LOA for new BNATCS codes dated 5/30/2026. | *0 Renamed in Revision J **1, 2, & 8 added in Revision J ***S & V changed code in Revision J | *0-Troubleshooting/Isolate **1-Measure/Adjust Parameters **2-Perform Alignment 3-Perform Diagnostic 4-Remove and Replace 5-Repair Parts 6-Order Parts 7-Reset or Initialization **8-Perform Cleaning 9-Other ****B-BNATCS Site Preparation C-Adjustment of Certification Parameter F-Facility Power & Support Systems L-Loss of Redundancy ***S-Snow/Ice Removal ***V-Vegetation Control |
| 59 | Other | TBD | M-Maintenance Assist (MA) |
Table 3. Scheduled Interruption Code Category
Code Category | Administrative Activities | Description | Supplemental Codes |
|---|---|---|---|
| 60 | Periodic Maintenance (PM) | An interruption of a facility or service for planned periodic maintenance activities. This includes performance checks, adjustments, calibration, and cleaning. Control Centers must use this cause code to document maintenance to FAA lines (all types), electronics systems/components, or plants and structures. This does not include periodic software activities (see cause code 66). | 0-Periodic Maintenance 7- Periodic Maintenance for Reset/Initialization/Cold Start/CHNL Promo |
| 61 | Non-FAA Lines, Circuits, or Leased/Provisioned Services (LPS) | An interruption due to loss of a leased control, communication, data transmission line (Telco, military, etc.) including scheduled line runs, or Leased/Provisioned Service (ADS-B, CPDLC, WAMS, etc). (see 6040.15, Appendix B, para. 12.b. for additional guidance.) | 0-Equipment 1-Circuit/Line/IP Cloud 2-RCL (Telco provider maintained only) 3-Power (Telco provided) 4-Military *5-Obsolete Infrastructure (LOA Effective 03/29/2024) **6-Leased/Provisioned Service (Non-FAA Leased Telco) Coming in Draft 6000.15J CHG2 |
| 62 | *Improvements/Runway Closures **LOA for new BNATCS codes dated 5/30/2026. | An interruption for official modifications, equipment upgrades, facility relocations, runway closure or construction at or near a facility location that dictates removal from service of that facility. Runway closure includes special use such as air shows and runways closed for seasonal reasons by local government or airport authorities. This code includes firmware changes issued as modifications. For NAPRS reporting purposes the definition for an FSEP primary key field is Facility Identification Code (FIC), Class, Facility Type or Location Ident. Refer to 6040.15, Appendix C for further definition of terms in this paragraph. | 0-Modification (must have appropriate modification or NAS Change Proposal (NCP) number in the summary field). 1-Equipment upgrade (requires a change in an FSEP primary key field) 2-Relocation (see 6040.15, Appendix C, para hh.) 3-Local Release Change (Software Update). 4-Runway closure/Construction (includes runway/taxiway closures and construction on the runway/taxiway or in the immediate area of the facility - does not include work or repair on or in the facility such as antenna replacement, RF cable replacement, etc. (see code 65). 8-Modification to another Facility/Service. **B-BNATCS Modification/Upgrade F-Facility Power and Support Systems (See 6040.15 Appendix B Paragraph 9) (also includes building upkeep such as painting, roof replacement/repairs, power, grounding and bonding, etc.) M-Maintenance Alert Inspections/Activities R-Runway Safety Area (RSA) work. Note: Use this code only when work is specifically identified as RSA. V-Vegetation Control (includes mowing, tree trimming, etc. |
| 63 | Flight Inspection **LOA for new BNATCS codes dated 5/30/2026. | An interruption to a facility for airborne inspection of the radiated characteristics of that facility by flight inspection personnel. This code is only for interruptions due to airborne measurements by flight inspection. Do not use for pre-flight inspection measurements required by FAA Order 6750.49 unless the measurements and flight inspection are the same day. Otherwise, use code 60 for interruptions needed for pre-flight measurements. Use this code to capture the time a facility is out of service waiting on a flight check to occur (W). | 0-Scheduled (by Flight Inspection Services 1-Post Aircraft Accident (except Nav/Aid, see 6040.15, Appendix B, para. 9) 2-Special (requested by Technical Operations) **B-BNATCS Integration C-Flight check cancelled R-Restoral Flight Check W-Waiting for Flight Check (see 6040.15, Appendix B, paragraph 10c.) |
| 64 | *Administrative | A facility/service interruption because of administrative requirements such as special tests, Department of Defense activities including optimization, formal facility inspections, training, performance/certification examinations, hazardous misleading information (HMI), and key site testing at en route and terminal automation facilities. | 0-Special Tests (verification of equipment post aircraft accident, certification test) 1-DoD Activities (includes optimization performed by DOD.) 2-Facility Inspections 3-Training (On-the-Job / Performance Exam) 4-Reserved 5-Key Site Testing 6-Administrative 7-Reserved H-Hazardous Misleading Information (HMI) Shutdown S-Solar Outage Prediction Z-Deviation – NOTAM Administrative Error |
| 65 | Corrective Maintenance **LOA for new BNATCS codes dated 5/30/2026. | A properly coordinated, scheduled action to correct a deterioration in the operation of a facility/service. This code applies only when the facility/service is operating within specified requirements (operational) prior to the corrective activity. This includes troubleshooting, snow removal, RF cable replacement, antenna replacement, dust/debris on lens, etc. | 0-Troubleshooting 1-Snow/Ice Removal (includes dust/debris on lens) *2-Reserved. 3-Replace/Repair 4-Network Maintenance 5-FAA Lines/Links/Intermediate Facility (FOTS/FAA RCL/RCE/etc) 6-Frequency change 9-Other (includes power off/on cycle) **B-BNATCS Integration S-Safety (used only when related to personnel safety, not equipment maintenance) (see 6040.15, Appendix B, paragraph 10c) |
| 66 | Software | An interruption because of a software or program activity. This includes operational program/patch testing and database testing activities, or a planned action to correct a deterioration of service performance. This code applies to activities or actions to remove a patch from the system, add a local patch to the system, or to correct or improve the adapted database. Use this code only when the software is operating within specifications prior to corrective activities. Use this code for service reporting only, with the exception of certain facilities that are specified in the specific reporting guidance in the Desk guide. | 0-Reset/Initialization not associated with a PM – see CC 60, SC 7 for PM 1-Software Loads or reloads 2-Adaptation/Application Loads or reloads 3-Chart Loads 4-Troubleshooting 5-Reserved 6-Security Activities 7-Testing |
| 67 | Protective Shutdown | Use this code to capture a protective shutdown for impending natural disasters (e.g. hurricane, flood, tsunami, tornado, fire, blizzard, etc.). If a facility cannot be returned to service after the natural event has ended, this interruption code must be changed to an appropriate, unscheduled (8X) interruption code. This is an exception to the policy in 6040.15, Appendix B, paragraph 2.b. | 0-Natural Disaster (hurricane, flood, fire, etc) 1-Equipment Protection (roof leaking, HVAC failure, etc) |
| 68 | Related **LOA for new BNATCS codes dated 5/30/2026. | Use this code when a facility or service fails to perform its intended function as a result of an interruption of another facility or service. | 0-Caused by Facility Interruption 1-Caused by Service Interruption **B-BNATCS Integration S-Safety (used only when related to personnel safety, not equipment maintenance) (see 6040.15, Appendix B, paragraph 10d) |
| 69 | Other | Control Centers can use this code only if another scheduled code category does not apply or there is a specific need to document a technician(s) at a site (see 6040.15, Appendix F). | 9-Other T-TOS/MAM |
| *70 | ATC OCL Event | Use this code for scheduled ATC Operational Contingency Level (OCL) events. Added 03/01/2021. | 0 - Automation (e.g., loss of critical (NAS) automation, i.e. STARS, ERAM, MEARTS 1- Communications (e.g., loss of critical air/ground communications) 2 - Navigation (e.g., loss of critical instrument landing systems, reduction in categories etc.) 3 - Surveillance (e.g., loss of primary/secondary radar or other surveillance input 4 - Telco/Telephony (e.g., loss of critical ground/ground communications) 5 - Weather/Natural Disaster (Hurricane / High winds / Tornado / Flooding / Earthquake) 6 - Power (e.g., loss of critical or backup power) 7 - Environmental (Loss of Cooling (Chiller/HVAC)) 8 – Building Condition (Water intrusion – i.e. roof leak) 9 – Fire/Smoke Alarm A - Environmental (Air Quality – Suspected Asbestos Release / Odors / Fumes) I - Insects/Pests H - Physical Hazards – i.e. Broken Glass S - Security Incident / Civil Unrest P – Pandemic / Health Hazard Cleaning (i.e. COVID-19) U – Unable to Contact (e.g. no contact or response from a facility) X - Staffing (e.g., significant reduction in ATC Z - Other |
| 71 | through 79 Reserved |
Table 4. Unscheduled Interruption Code Category
Code Category | Administrative Activities | Description | Supplemental Codes |
|---|---|---|---|
| 80 | Equipment **LOA for new BNATCS codes dated 5/30/2026. | Any failure or malfunction of electronic or lighting systems (including firmware), FAA lines or links (all types), FAA electrical distribution systems or structure items that cause an interruption to a facility or service. Control Centers can also use to document events where either the facility/service came back on its own (SC 8) or a technician responded and no trouble found (SC N). | 0-Reset for non Tech Ops groups (such as AT. Use Supp Code 7 for ATSS and CC resets). 1-Reserved 2-Reserved 3-Reserved 4-Equipment Part/Component Failure 5-FAA Line/Links or Intermediate Facility (FOTS/ FAA RCL/RCE/etc) 6-Reserved 7-Manual Reset (equipment only, use when action taken to restore facility/service was an equipment reset) 8-Intermittent Errors/Auto Reset (facility came back on its own) 9-Software/Firmware Error (use for system failures where no matching service exists - see code 86 if a service exists) A-Safety-delayed restoration due to employee fatigue **B-BNATCS Integration F-Facility Power & Support Sys (See 6040.15, Appendix B, para. 9) N-No trouble found (technician responded, facility found operating normally and no indication of facility interruption) S-Safety - delayed restoration (weather, 2 person rule, etc) (IR cannot be closed using this SC) (see 6040.15, Appendix B, paragraph 10d) T-Waiting technician availability (IR cannot be closed using this SC) (see 6040.15, Appendix B, paragraph 10d) |
| 81 | Non-FAA Lines, Circuits, or Leased/Provisioned Services (LPS) NOTE: For a cable outage See Code 89 | An interruption to FAA facilities or services caused by the loss of contractor or military provided control, communications, or data transmission circuits (1,2,4). Also includes the loss of contractor provided equipment (0) and power (3), or a Leased/Provisioned Service. Use this code to document performance degradation of circuits. See 6040.15, Appendix B, Paragraph 12.b. | 0-Equipment 1-Circuit/Line/IP Cloud 2-RCL (Telco provider maintained only) 3-Power (Telco Provided) 4-Military * 5-Obsolete Infrastructure (LOA Effective 03/29/2024) **6-Leased/Provisioned Service (Non-FAA Leased Telco) Coming in Draft 6000.15J CHG2 7-Reserved 8-Reserved 9-Reserved |
| 82 | Prime Power | An interruption to a facility or service caused by the loss of prime power to the facility/service. Prime power may be commercial, FAA, military, or sponsor supplied. This code applies to all power related interruptions and includes fluctuations, surges, transients, or complete loss of power. Examples of the use of this code include damage to power poles for any reason, blown fuses on power poles, etc. Facility/service interruptions due to tripped equipment circuit breakers, blown equipment fuses, or tripped facility circuit breakers must not use this code but must use code 80/4. | F-Facility Power & Support Systems (See 6040.15, Appendix B, para. 9) |
| 83 | Standby Power | An interruption to a facility or service caused by the loss of standby power when it is serving the facility/service as a back up to the normal prime power. This includes failure to assume the load upon transfer, fluctuations, surges, running out of fuel, battery discharge before commercial power is restored, and transients caused by standby power. For reporting purposes, the definition of Standby Power includes standby power plants, power switchgear, uninterruptible power source/power conditioning system (PCS), and batteries. Failures of equipment operating within tolerance that occur as a direct result of standby power must use this code. Standby power facilities (SX, PCS, DCBUS, etc.) cannot use this code. | F-Facility Power & Support Systems Failure *B-Batteries Exhausted *H-Hydrogen Supply Exhausted *P-Petroleum Supply Exhausted *Added 08/19/2022 |
| 84 | Interference Conditions | Any condition or external source that interrupts, degrades or masks the desired transmit or received signal. Examples include but are not limited to the following: false targets due to anomalous propagation, radio frequency interference (RFI), temperature inversion. Report an interference condition against services only. The exception is if the facility experiencing the interference does not have an assigned service. In these cases, it is acceptable to report against the facility. Do not use this code to describe the loss of non-FAA (or leased) lines/circuits (see cause code 81) | 0-Anomalous Propagation (radar services only) 1-Reserved 2-Temperature Inversion or Path Fade 3-RF Interference (includes unauthorized transmissions, weather, skip) 4-Solar Activity 5-Intermodulation (TX/RX) 6-Reserved 7-Intermittent Spurious 8-Stuck Mic or Continuous Carrier 9-Other |
| 85 | Nature/Weather/Physical Effects | Transient environmental conditions that cause a facility/service interruption. Examples: snowdrifts affecting monitor operations, ice buildup on antennas, weather damage, dust, debris on lens, and lightning. | 0-Snow 1-Ice 2-Wind/Tornado/Hurricane (includes dust/debris on lens) 3-Lightning Strike 4-Flood 5-Rain 6-Temperature Extremes/Variation 7-Birds/Animals/Insects 8-Earthquake/Volcanic Event 9- Fire V- Vegetation (trees, etc) |
| 86 | Software | Unscheduled interruptions caused by operational or control software. Use this code only if it is reasonably certain that software programming was the cause. Use this code for service reporting only with the exception of certain facilities specified in the NAPRS desk guide. | 0-Operating System 1-Software Load 2-Adaptation Load 3-Chart Load 4- Firmware |
| 87 | Unknown | Use this code for those situations where the cause of the interruption or a logical explanation for the problem cannot be determined. Do not use this code if there is a reasonable certainty that the equipment, software, weather, power, or leased telco lines caused the problem. Control Centers may use this code until they know the exact cause of the interruption. If used, Control Centers must change this cause code to the correct cause code once there is a final determination of the cause of the interruption. | 0-Unknown |
| 88 | Related **LOA for new BNATCS codes dated 5/30/2026. | Use this code when a facility or service fails to perform its intended function because of an interruption of another facility or service. | 0-Caused by Facility Interruption 1-Caused by Service Interruption A-Safety-delayed restoration due to employee fatigue. **B-BNATCS Integration C-ILS CoS events (Continuity of Service, CoS) S-Safety (personnel/delayed restoration) (weather, 2 person rule, etc) (IR cannot be closed using this SC) (see 6040.15, Appendix B, paragraph 10d) T-Waiting technician availability (IR cannot be closed using this SC) (see 6040.15, Appendix B, paragraph 10d) |
| 89 | Deviation **LOA for new BNATCS codes dated 5/30/2026. | All interruptions caused by an intentional or unintentional personnel action, regardless of the persons affiliation or organization, must use this code. (See 6040.15, Appendix H, for additional guidance on deviation reporting.) | 0-Control Center (Technical Operations) 1-Military 2-Program Implementation Error (e.g. documentation, process instructions, hardware/software incompatibilities, etc) 3-Vandalism, theft or other act of purposeful destruction 4-Airport Activities (airport ops, Fixed Based Operations (FBO), etc.) 5-Technical Operations (non-Control Center SSC's, Engineering Services) 6-Air Traffic *(Use Code 80/N for No Trouble Found) 7-Other FAA Org, such as Flight Check, non-mil govt agency 8-NON-FAA (non-NAS maintenance contractor, the public, etc) 9-Aircraft Accident (NAVAID verification after aircraft accident) (see 6040.15, Appendix B, Paragraph 12) **B-BNATCS Integrator * C-Telco Cable/Fiber Cuts (LOA Effective 03/29/2024) * T-Telco Operator Error (LOA Effective 03/29/2024) |
| *90 | ATC OCL Event | Use this code for unscheduled ATO Operational Contingency Level (OCL) events. Added 03/01/2021. | 0 - Automation (e.g., loss of critical (NAS) automation, i.e. STARS, ERAM, MEARTS 1- Communications (e.g., loss of critical air/ground communications) 2 - Navigation (e.g., loss of critical instrument landing systems, reduction in categories etc.) 3 - Surveillance (e.g., loss of primary/secondary radar or other surveillance input 4 - Telco/Telephony (e.g., loss of critical ground/ground communications) 5 - Weather/Natural Disaster (Hurricane / High winds / Tornado / Flooding / Earthquake) 6 - Power (e.g., loss of critical or backup power) 7 - Environmental (Loss of Cooling (Chiller/HVAC)) 8 – Building Condition (Water intrusion – i.e. roof leak) 9 – Fire/Smoke Alarm A - Environmental (Air Quality – Suspected Asbestos Release / Odors / Fumes) I - Insects/Pests H - Physical Hazards – i.e. Broken Glass S - Security Incident / Civil Unrest P – Pandemic / Health Hazard Cleaning (i.e. COVID-19) U – Unable to Contact (e.g. no contact or response from a facility) X - Staffing (e.g., significant reduction in ATC Z - Other |
| 91 | through 99 Reserved |
Table 5. Maintenance Action Codes (MAC)
MAC | Description | Use With Code Category |
|---|---|---|
| $ | Mod Issued | Code Cat 56 |
| 1 | Maintenance in Progress (MIP) | Code Cat *56, 58, Any 60/80 Series (LOA Effective 03/29/2024) |
| *2 | Awaiting Flight Inspection (AFI) (Delaying RTS) *Coming in Draft 6000.15J CHG2 | *Code Cat 53, 58, Any 60/80 Series (LOA Effective 05/13/2025) |
| 3 | Military Corrected | Code Cat 58, Any 60/80 Series |
| 4 | Other | Code Cat 10, 52, 58, Any 60/80 |
| 5 | Awaiting Parts on Order (AWP) | Code Cat 06, 50, 55, 56, 58, Any 60/80 Series |
| 6 | Patched/Switched | Code Cat 58, Any 60/80 Series |
| 7 | Propagation Condition Improved | Code Cat 58, Any 60/80 Series |
| *8 | Parts Order Delayed (POD) Restrictive part ordering measures. *(Added 6000.15J CHG1) *Removing for Mods in Draft 6000.15J CHG2. | *Code Cat 06, 50, 55, 58, Any 60/80 Series **LOA dated 5/30/2026. |
| *9 | Do Not Restore (DNR) Only use when approved SADC chart date is within 365 days. *Added in Draft 6000.15J CHG2 | Code Cat 58, 62, 64, 65, 67, 68, Any 80 Series (LOA Effective 05/13/2025) |
| A | Reserved | Code Cat 58, Any 60/80 Series |
| B | Reserved | Code Cat 58, Any 60/80 Series |
| C | Restored | Code Cat 57, 58, Any 60/80 Series |
| D | Self Corrected/No Trouble Found | Code Cat 58, Any 60/80 Series |
| *E | *Disapproved (Added CHG1 for Air Traffic use only) | *Code Cat 02, Any 60/80 Series |
| F | Telco Unspecified Correction | Code Cat 58, Any 60/80 Series |
| G | Mod Completed | Code Cat 56 |
| H | Mod Not Performed | Code Cat 56 |
| I | PM Incomplete | Code Cat 50, 60, 64, or 68; not 55 |
| *J | Mod Removed *Added in Draft 6000.15J CHG2 | Code Cat 56 **LOA dated 5/30/2026. |
| K | Replace Peripherals | Code Cat 65 or 80 |
| L | Replacement of Light Bulbs in Lighted Nav/Aids | Code Cat 58 |
| M | Maintenance Moratorium | Code Cat 50 or 55 |
| N | PM Not Performed | Code Cat 55, 60, 64 or 68 only |
| P | PM Performed | Code Cat 50, 60, 65 or 68; not 55 |
| *Q | Awaiting Maintenance (AWM) | Code Cat *56, 58, Any 60/80 Series **LOA dated 5/30/2026. |
| R | Mod on Hold (HQ use only) | Code Cat 56 |
| S | Service Complaint | Code Cat Any 60/80 Series |
| T | Test Equipment Not Available | Code Cat 50, 55, 58, Any 60/80 Series |
| U | Equipment Not Avail for PM | Code Cat 55 only |
| *V | Reserved (Was Viral Pandemic Deferment) *Removed in Draft 6000.15J CHG2, enacted via LOA dated 5/30/2026. | Code Cat 06, 50, 55, 56, 58, Any 60/80 Series |
| W | Mod Not Applicable | Code Cat 56 |
| X | Certification | Code Cat 51; not 52 |
| Z | Mod Ready to Install | Code Cat 56 |
Last updated: Tuesday, August 25, 2026