Appendix 1 APPENDIX 1. DEFINITIONS The following definitions are applicable to ETOPS. They include definitions from Title 14 of the Code of Federal Regulations (14 CFR) parts 1 and 121, as well as terms that are used within the context of this AC with respect to ETOPS:
1. Adequate Airport. An airport that an airplane operator may list with approval from the Federal Aviation Administration (FAA) because that airport meets the landing limitations of part 121, § 121.197 and is either, an airport that meets the requirements of 14 CFR part 139 subpart D, excluding those that apply to aircraft rescue and firefighting service, or a military airport that is active and operational. Airports without specific part 139 approval (i.e., outside FAA jurisdiction), may be considered adequate provided that they are determined to meet the equivalent standards and intent of part 139 subpart D.
2. Configuration, Maintenance, and Procedures (CMP) Document. A document approved by the FAA that contains minimum configuration, operating, and maintenance requirements, hardware life-limits, and Master Minimum Equipment List (MMEL) constraints necessary for an airplane-engine combination to meet ETOPS type design approval requirements.
3. Dual Maintenance. Dual maintenance means maintenance on the “same” ETOPS significant system. Dual maintenance is maintenance action performed on the same element of identical, but separate ETOPS Significant Systems during a scheduled or unscheduled maintenance visit. Dual maintenance on “substantially similar” ETOPS significant systems means maintenance actions performed on engine-driven components on both engines during the same maintenance visit.
4. Equal-Time Point (ETP). A point on the route of flight where the flight time, considering wind, to each of two selected airports is equal.
5. ER. An abbreviation used in the MMEL and in the minimum equipment list (MEL) of some certificate holders to indicate ETOPS. As used in this AC, any ETOPS MMEL/MEL restrictions applicable to ETOPS.
6. ETOPS Alternate Airport. An adequate airport listed in the certificate holder’s operations specifications (OpSpecs) that is designated in a dispatch or flight release for use in the event of a diversion during ETOPS. This definition applies to flight planning and does not in any way limit the authority of the pilot in command (PIC) during flight.
7. ETOPS Area of Operation. For turbine-engine-powered airplanes with two engines an area beyond 60 minutes from an adequate airport, or with more than two engines in passengercarrying operations, an area beyond 180 minutes from an adequate airport, and within the authorized ETOPS maximum diversion time approved for the operation being conducted. An ETOPS area of operation is calculated at an approved one-engine inoperative cruise speed under standard conditions in still air.
8. ETOPS Entry Point. The first point on the route of an ETOPS flight; determined using a oneengine inoperative cruise speed under standard conditions in still air that is more than 60 minutes from an adequate airport for airplanes with two engines, and more than 180 minutes from an adequate airport for passenger-carrying airplanes with more than two engines.
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9. ETOPS Significant System. An airplane system, including the propulsion system, the failure or malfunctioning of which could adversely affect the safety of an ETOPS flight, or the continued safe flight and landing of an airplane during an ETOPS diversion. Each ETOPS significant system is either an ETOPS Group 1 significant system or an ETOPS Group 2 significant system.
a. An ETOPS Group 1 Significant System:
(1) Has fail-safe characteristics directly linked to the degree of redundancy provided by the number of engines on the airplane;
(2) Is a system, the failure or malfunction of which could result in an in-flight shutdown (IFSD), loss of thrust control, or other power loss;
(3) Contributes significantly to the safety of an ETOPS diversion by providing additional redundancy for any system power source lost as a result of an inoperative engine; and
(4) Is essential for prolonged operation of an airplane at engine inoperative altitudes.
b. An ETOPS Group 2 significant system is an ETOPS significant system that is not an ETOPS Group 1 significant system. Group 2 system failures will not cause aircraft flight performance loss or cabin environment problems but may result in diversions or turn backs.
10. ETOPS-Qualified Personnel. A person performing maintenance for the certificate holder, who has satisfactorily completed the certificate holder’s ETOPS qualification program.
11. ETOPS. An airplane flight operation during which a portion of the flight is conducted beyond 60 minutes from an adequate airport for turbine-engine-powered airplanes with two engines, and beyond 180 minutes for turbine-engine-powered passenger-carrying airplanes with more than two engines. This distance is determined using an approved one-engine inoperative cruise speed under standard atmospheric conditions in still air.
12. Flight-by-Flight Exception. The application of a greater ETOPS maximum diversion authority under specific, limited circumstances, as defined in this AC, when a flight cannot be planned on the preferred route within an authorized lesser diversion time.
13. In-Flight Shutdown (IFSD). When an engine ceases to function (when the airplane is airborne) and is shut down, whether self induced, flightcrew initiated or caused by an external influence. The FAA considers IFSD for all causes, such as flameout, internal failure, flight crew initiated shutdown, foreign object ingestion, icing, inability to obtain or control desired thrust or power, and cycling of the start control; however briefly, even if the engine operates normally for the remainder of the flight. This definition excludes the airborne cessation of the functioning of an engine when immediately followed by an automatic engine relight and when an engine does not achieve desired thrust or power but is not shut down.
14. Maximum Diversion Time. For the purposes of ETOPS in § 121.161 and related ETOPS regulations, maximum diversion time (for example 120 minutes, 180 minutes, 240 minutes, and, beyond 240 minutes) is the longest diversion time authorized for a flight under Page 2
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AC 120-42B Appendix 1 Page 3 the operator’s ETOPS authority. It is calculated under standard conditions in still air at a oneengine inoperative cruise speed.
15. One-Engine Inoperative Cruise Speed. For the purposes of those sections of part 121 applicable to ETOPS, the one-engine inoperative cruise speed is a speed within the certified operating limits of the airplane that is specified by the certificate holder and approved by the FAA for calculating required fuel reserves needed to account for an inoperative engine, or determining whether an ETOPS alternate is within the maximum diversion time authorized for an ETOPS flight.
NOTE: The following areas (16-18) are defined for the purposes of those sections of part 121 applicable to ETOPS.
16. North Pacific (NOPAC). The North Pacific Air Traffic Service (ATS) routes and adjacent airspace between Anchorage and Tokyo Flight Information Regions (FIR).
17. North Pacific Area of Operations. Pacific Ocean areas north of 40º North latitudes including NOPAC ATS routes, and published Pacific Organized Track System (PACOTS) tracks between Japan and North America. (For the purposes of this definition, “North America” includes the countries of Canada, the United States, and Mexico.)
18. Polar Areas.
a. North Polar Area. The entire area north of 78º North latitude.
b. South Polar Area. The entire area south of 60º South latitude.
19. Process. A series of steps or activities that are accomplished in a consistent manner to ensure a desired result is attained on an ongoing basis.
20. Proven Process. A process is considered to be proven when the following elements are developed and implemented:
a. Definition and documentation of process elements.
b. Definition of process related roles and responsibilities.
c. Procedures for validation of process or process elements to include:
• Indications of process stability/reliability;
• Parameters to validate process and monitor (measure) success; and
• Duration of necessary evaluation to validate process.
d. Procedure for follow-up in-service monitoring to assure the process remains reliable and stable.
AC 120-42B Appendix 2 APPENDIX 2. ETOPS APPROVALS As described in Section 401 of this AC, appendix P to part 121 permits certificate holders to seek various levels of ETOPS approvals. This Appendix summarizes the details for each approval level, and is intended to provide further guidance to the requirements in appendix P to part 121.
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1. Airplanes with Two Engines
Approval Level Area of Applicability Requirements How to apply Comments 75 minutes Caribbean / Western Atlantic Area.
1. The airplane-engine combination need not be type design approved for ETOPS.
2. The FAA reviews the airframe-engine combination to ensure the absence of factors that could prevent safe operations.
3. The airframe-engine combination must have sufficient favorable experience to demonstrate to the Administrator a level of reliability appropriate for 75-minute ETOPS.
4. Even though there is no requirement for the type design approval of the airplane, the certificate holder must ensure the airplane has systems that are capable of complying with the requirements of § 121.633 for timelimited system planning.
5. The certificate holder must comply with the maintenance program requirements of § 121.374, except that a pre-departure service check before departure of the return flight is not required. Guidance is provided in Chapter 3, paragraphs 301 and 302 of this AC.
6. The certificate holder must comply with the flight operational requirement in part 121, as described in Chapter 3, paragraphs 303 and 304 of this AC.
7. The certificate holder need not comply with 120-minute ETOPS provisions of the MMEL.
8. The certificate holder must operate in accordance with the ETOPS authority as contained in its operations specifications (OpSpecs).
Request made to the FAA for route authority. The application will show the need for such an authority.
Minimal or no inservice experience with the airplaneengine combination is required (see Appendix 3).
This area is considered a “benign” area of operations due to
(1) numerous airports, (2) a high level of reliability and availability are required of communications, navigation, and ATC services and facilities, and (3) prevailing weather conditions that are stable and generally do not approach extremes in temperature, wind, ceiling, and visibility.
75 minutes Other areas besides Caribbean / Western
1. The airplane-engine combination need not be type design approved for ETOPS.
2. The FAA reviews the airframe-engine combination to ensure the absence of factors that could prevent safe operations.
Request made to the FAA for route authority. The application will Areas not considered benign such as North Atlantic
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AC 120-42B Appendix 2 Page 2 Atlantic Area operations.
3. The airframe-engine combination must have sufficient favorable experience to demonstrate to the Administrator a level of reliability appropriate for 75-minute ETOPS.
4. Even though there is no specific requirement for type design approval of the airplane, the certificate holder must ensure the airplane has systems that are capable of complying with the requirements of § 121.633 for time-limited system planning.
5. The certificate holder must comply with the maintenance program requirements of § 121.374. Guidance is provided in Chapter 3, paragraphs 301 and 302 of this AC.
6. The certificate holder must comply with the flight operational requirements in part 121, as described in Chapter 3, paragraphs 303 and 304 of this AC.
7. The certificate holder must comply with 120-minutes ETOPS provisions in the MMEL.
8. The certificate holder must operate in accordance with the ETOPS authority as contained in its OpSpecs.
show the need for such an authority.
(NAT/NMPS) area. Minimal or no in-service experience with the airplane-engine combination is required (see Appendix 3).
90 minutes Micronesia 1. The airplane-engine combination must be type design approved for 120- minutes ETOPS or greater.
2. The certificate holder must comply with the maintenance program requirements of § 121.374, except that a pre-departure service check before departure of the return flight is not required. Guidance is provided in Chapter 3, paragraph 301 and 302 of this AC.
3. The certificate holder must comply with the flight operational requirement in part 121, as described in chapter 3, paragraphs 303 and 304 of this AC.
4. The certificate holder must comply with 120-minutes ETOPS provisions in the MMEL.
5. The certificate holder must operate in accordance with the ETOPS authority as contained in its OpSpecs.
Request made to the FAA for route authority. The application will show the need for such an authority.
Minimal or no inservice experience with the airplaneengine combination is required (see Appendix 3).
120 minutes Unlimited (no area restriction)
1. The airplane-engine combination must be ETOPS type design approved for 120 minutes or greater.
2. The certificate holder must comply with all part 121 flight operations and maintenance requirements pertaining to ETOPS as discussed in Chapter 4, paragraph 401(b) of this AC provides the two
AC 120-42B Appendix 2 Approval Area of Requirements How to apply Comments Level Applicability Chapter 3 of this AC.
3. The certificate holder must comply with 120-minute ETOPS provisions in the MMEL.
4. The certificate holder must operate in accordance with the ETOPS authority as contained in its OpSpecs.
methods for gaining approval.
138 minute (for certificate holders who are currently approved for 120- minute ETOPS) Unlimited (no area restriction)
1. The airplane-engine combination must be ETOPS type design approved for 120-minute or greater. If approved only up to 120 minute, the FAA must ensure the airplane time-limited systems support operations up to 138 minute in accordance with § 121.633.
2. Comply with all part 121 flight operations and maintenance requirements pertaining to ETOPS as discussed in Chapter 3 of this AC.
The certificate holder must conduct training for maintenance, dispatch and flightcrew. Training should include any unique aspects of 138 minute operations e.g., any additional requirement imposed by the FAA including MEL requirements.
3. Must comply with the “beyond 120-minute ETOPS provisions in the MMEL. If a 180-minute ETOPS MMEL does not exist for the airplane, the certificate holder must apply to the FAA for any additional items that may be applicable for 138-minute operations.
4. 138-minute ETOPS authority is used when the route cannot be efficiently operated under 120-minute ETOPS.
5. The certificate holder must operate in accordance with the ETOPS authority as contained in its OpSpecs.
Certificate holder with 120-minute ETOPS authority may apply to the FAA. The application will show the need for such an authority.
A modified MEL to support operations should be submitted with the application to AFS-200 through the certificates CHDO.
This is an extension of previous 120- minute authority.
Approval is granted for operations up to 138 minutes on a flight-by-flight exception basis.
138 minute (for certificate holders who are currently approved for 180- minute ETOPS) Unlimited (no area restriction)
1. Airplane-engine combination must be ETOPS type design approved for 180 minutes or greater.
2. Comply with all part 121 flight operations and maintenance requirements pertaining to ETOPS as discussed in Chapter 3 of this AC.
3. Must comply with the 180-minute ETOPS provisions in the MMEL.
4. The certificate holder must operate in accordance with the ETOPS authority as contained in its operations specifications.
5. The certificate holder must conduct training for maintenance, dispatch and flightcrew regarding the differences between 138-minute and 180- minute diversion authority.
Certificate holder with 180-minute ETOPS authority may apply to the FAA. The application will show the need for such an authority.
Since this authority is less than the certificate holder’s maximum ETOPS authority, it may be exercised on an unlimited basis.
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AC 120-42B Appendix 2 Page 4 180 minute Unlimited (no area restriction)
1. Airplane-engine combination must be ETOPS type design approved for 180-minute or greater.
2. Comply with all part 121 flight operations and maintenance requirements pertaining to ETOPS as discussed in Chapter 3 of this AC.
3. Must comply with the 180-minute ETOPS provisions in the MMEL.
4. The certificate holder must operate in accordance with the ETOPS authority as contained in its OpSpecs.
Chapter 4, paragraph 401(b) of this AC provides the methods for gaining approval to operate under 180 minute
207 minute In North Pacific Area of Operations (Pacific Ocean areas north of 40N latitudes including
NOPAC ATS routes and published PACOTS tracks between Japan and North America). The subcontinent of North America includes Canada, Mexico and the United States.
1. Airplane-engine combination must be ETOPS type design approved for 180 minutes or more. The certificate holder must comply with § 121.633(a), however, the approved time for the airplane’s most limiting ETOPS significant system and most limiting cargo-fire suppression time must be at least 222 minutes.
2. Certificate holder must have existing 180-minute ETOPS operating authority for the airplane-engine combination to be operated.
3. The certificate holder must have previous ETOPS experience satisfactory to the Administrator.
4. The certificate holder must make every effort to plan ETOPS within 180 minutes or less, if possible.
5. The certificate holder must inform the flightcrew each time an airplane is proposed for dispatch for greater than 180 minutes and tell them why the route was selected.
6. In addition to the equipment specified in the certificate holder’s minimum equipment list for 180-minute ETOPS, the following systems must be operational for dispatch:
(A) The fuel quantity indicating system, (B) The APU (including electrical and pneumatic supply and operating to the APU’s designed capability) when the APU is necessary for an airplane to comply with ETOPS requirements, (C) The auto throttle system, (D) The communication system required by § 121.99(d) or § 121.122(c), as applicable, and (E) One-engine inoperative auto-land capability, if flight planning is predicated on its use.
Those certificate holders that have 180-minute ETOPS authority in this area can apply to the FAA for approval as an extension to their 180-minute authority.
This is an extension of 180- minute ETOPS authority for the specific case of operations in the North Pacific Area of Operations.
AC 120-42B Appendix 2 Approval Area of Requirements How to apply Comments Level Applicability
7. Comply with all part 121 flight operations and maintenance requirements pertaining to ETOPS as discussed in Chapter 3 of this AC.
8. The nearest available ETOPS alternate within 207-minutes diversion time must be specified in the dispatch or flight release.
9. In conducting such a flight the certificate holder must consider Air Traffic Service’s preferred track.
10. This exception may be used only on a flight-by-flight basis when an ETOPS alternate is not available within 180 minutes for reasons such as political or military concerns; volcanic activity; temporary airport conditions; and airport weather below dispatch requirements or other weather related events.
11. The certificate holder must operate in accordance with the ETOPS authority as contained in its operations specifications.
12. The certificate holder must track how many times 207-minute authority is used.
240 minute North Polar Area, in the area north of the NOPAC, and in the Pacific Ocean north of the equator
1. Airplane-engine combination must be ETOPS type design approved for greater than 180 minutes. The certificate holder must ensure the airplane has systems that are capable of complying with the requirements of § 121.633(b) for time-limited system planning.
2. Certificate holder must have existing 180-minute ETOPS operating authority for the airplane-engine combination to be operated.
3. The certificate holder must have previous ETOPS experience satisfactory to the Administrator.
4. The certificate holder must make every effort to plan ETOPS with 180 minutes or less, if possible.
5. The certificate holder must inform the flightcrew each time an airplane is proposed for dispatch for greater than 180 minutes and tell them why the route was selected.
6. In addition to the equipment specified in the certificate holder’s minimum equipment list for 180-minute ETOPS, the following systems must be operational for dispatch:
(A) The fuel quantity indicating system, (B) The APU (including electrical and pneumatic supply and operating to the APU’s designed capability) when the APU is necessary for an airplane to comply with ETOPS requirements, Those certificate holders that have 180-minute ETOPS authority in this area can apply to the FAA for approval as an extension to their 180-minute authority.
This is an extension of 180- minute ETOPS in this area and is to be used on a flight by flight exception basis when an ETOPS alternate is not available within 180 minutes.
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6/13/08 Approval Area of Requirements How to apply Comments Level Applicability (C) The auto throttle system, (D) The communication system required by § 121.99(d) or § 121.122(c), as applicable, and (E) One-engine inoperative auto-land capability, if flight planning is predicated on its use.
7. Comply with all part 121 flight operations and maintenance requirements pertaining to ETOPS as provided in Chapter 3 of this AC.
8. The nearest available ETOPS alternate within 240-minutes diversion time must be specified in the dispatch or flight release.
9. In conducting such a flight the certificate holder must consider Air Traffic Service’s preferred track.
10. The criteria used by the certificate holder to decide that extreme weather precludes using an airport must be established by the certificate holder, accepted by the FAA, and published in the certificate holder’s manual for the use of dispatchers and pilots.
11. The certificate holder must operate in accordance with the ETOPS authority as contained in its OpSpecs.
12. This exception may be used in the North Polar Area and in the area north of NOPAC only in extreme conditions particular to these areas such as volcanic activity, extreme cold weather at en route airports, airport weather below dispatch requirements, temporary airport conditions, and other weather related events. This exception may be used in the Pacific Ocean area north of the equator only for reasons, such as political or military concern, volcanic activity, airport weather below dispatch requirements, temporary airport conditions and other weather related events.
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AC 120-42B Appendix 2 Approval Area of Requirements How to apply Comments Level Applicability 240 minute Areas south of the equator:
1. Pacific Ocean areas between the US West coast and Australia, New Zealand and Polynesia,
2. South Atlantic Oceanic areas,
3. Indian Ocean areas
4. Oceanic areas between Australia and South America
1. Airplane-engine combination must be ETOPS type design approved for greater than 180 minutes. The certificate holder must ensure the airplane has systems that are capable of complying with the requirements of § 121.633 (b) for time-limited system planning.
2. Certificate holder must have existing 180-minute ETOPS operating authority for the airplane-engine combination to be operated.
3. The certificate holder must have previous ETOPS experience satisfactory to the Administrator.
4. In addition to the equipment specified in the certificate holder’s minimum equipment list for 180-minute ETOPS, the following systems must be operational for dispatch:
(A) The fuel quantity indicating system, (B) The APU (including electrical and pneumatic supply and operating to the APU’s designed capability) when the APU is necessary for an airplane to comply with ETOPS requirements, (C) The auto throttle system, (D) The communication system required by § 121.99(d) or § 121.122(c), as applicable, and (E) One-engine inoperative auto-land capability, if flight planning is predicated on its use.
5. Comply with all part 121 flight operations and maintenance requirements pertaining to ETOPS as provided in Chapter 3 of this AC.
6. The nearest available ETOPS alternate within 240-minutes diversion time must be specified in the dispatch or flight release.
7. The certificate holder must operate in accordance with the ETOPS authority as contained in its OpSpecs.
Request made to the FAA for route authority. The application will show the need for such an authority.
This is an unlimited authority Beyond 240 minute Specific city pairs in the following areas as designated in the operators application:
1. Airplane-engine combination must be ETOPS type design approved for greater than 180-minute. The certificate holder must ensure the airplane has systems that are capable of complying with the requirements of § 121.633 (b) for time-limited system planning.
2. The certificate holder must have existing 180-minute ETOPS operating authority for the airplane-engine combination to be operated.
3. The certificate holder must have previous ETOPS experience satisfactory to the Administrator.
4. The operator must have been operating at 180-minute or greater ETOPS Request made to the FAA for route authority. The application will show the need for such an authority.
There is no time limit to this authority.
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1. Pacific Ocean areas between the U.S. West coast and Australia, New Zealand and Polynesia,
2. South Atlantic Oceanic areas,
3. Indian Ocean areas
4. Oceanic areas between Australia and South America
5. South Polar Area
authority for at least 24-consecutive months, of which at least 12-consecutive months must have been under 240-minute ETOPS authority with the airplane-engine combination to be used.
5. In addition to the equipment specified in the certificate holder’s minimum equipment list for 180-minute ETOPS, the following systems must be operational for dispatch:
(A) The fuel quantity indicating system, (B) The APU (including electrical and pneumatic supply and operating to the APU’s designed capability) when the APU is necessary for an airplane to comply with ETOPS requirements, (C) The auto throttle system, (D) The communication system required by § 121.99(d) or § 121.122(c), as applicable, and (E) One-engine inoperative auto-land capability, if flight planning is predicated on its use.
6. The certificate holder must comply with all part 121 flight operations and maintenance pertaining to ETOPS as provided in Chapter 3 of this AC.
7. The certificate holder must operate in accordance with the ETOPS authority as contained in its OpSpecs.
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