Appendix A A-1 APPENDIX A. ACRONYMS 14 CFR Title 14 of the Code of Federal Regulations A4A Airlines for America AC Advisory Circular AD Airworthiness Directive AED Aircraft Evaluation Division ALI Airworthiness Limitation Item ALS Airworthiness Limitation Section AMC Acceptable Means of Compliance AMM Aircraft Maintenance Manual AMOC Alternative Method of Compliance ASI Aviation Safety Inspector CAMP Continuous Airworthiness Maintenance Program CDCCL Critical Design Configuration Control Limitations CMM Component Maintenance Manual CWT Center Wing Fuel Tank DAH Design Approval Holder DOT Department of Transportation DRS Dynamic Regulatory System EAPAS Enhanced Airworthiness Program for Airplane Systems EO Engineering Order EWIS Electrical Wiring Interconnection System EZAP Enhanced Zonal Analysis Procedure ESPM Electrical Standard Practices Manual FAA Federal Aviation Administration FEC Failure Effect Category FLSS Fuel Level Sensor System FQIS Fuel Quantity Indicating System FR Federal Register FS Flight Standards FSU Fuel System Unit FTS Fuel Tank Safety GFI Ground Fault Interrupter IBR Incorporated by Reference ICA Instructions for Continued Airworthiness LOA Letter of Authorization
Appendix A A-2 LODA Letter of Deviation Authority MPD Maintenance Planning Data MRB Maintenance Review Board MRBR Maintenance Review Board Report MSG Maintenance Steering Group MSI Maintenance Significant Items MSpec Management Specification MWG Maintenance Working Group NAA National Aviation Authority NTSB National Transportation Safety Board OEM Original Equipment Manufacturer OpSpec Operations Specification PI Principal Inspector PMA Parts Manufacturer Approval RII Required Inspection Item SFAR Special Federal Aviation Regulation STC Supplemental Type Certificate SWPM Standard Wiring Practice Manual TC Type Certificate TSO Technical Standard Order TWA Trans World Airlines VTO Volumeric Top-off WDM Wiring Diagram Manual
Appendix B B-1 APPENDIX B. LIST OF APPLICABLE SUPPLEMENTAL TYPE
CERTIFICATES (STC) Supplemental Type Certificate (STC) Number STC Holder Airplane Models Description Operator Actions ST00069BO Goodrich Corporation DC8-62, -62F, -63F, -72, -72F, -73F Fuel quantity indicating system (FQIS) (external to tank) STC amended January 5, 2004.
Operators must incorporate instructions for continued airworthiness (ICA) T3068-0005-01, Initial Issue, dated October 23, 2003 (or later version). (At “D” check interval, inspections of flight deck wiring and connectors.)
ST00020BO Goodrich Corporation B747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, B747SP & B747SR Retrofit of entire Fuel Quantity Gauging System STC amended October 19, 2004.
Operators must incorporate ICA T3070-0005-0101, Initial issue, dated July 2, 2004 (or later version). (At D check interval, inspections of wiring separation, shielding, bonding.)
ST00142BO Goodrich Corporation B737-300 Isolation fuel quantity transmitter system STC amended February 10, 2004.
Operators must incorporate ICA T3072-0005-0101, Revision A, dated January 22, 2004 (or later version).
(Periodic inspections of wiring and bonding) SA298NE Goodrich Corporation B727-100, -200 Computerized FQIS STC amended April 19, 2004.
Operators must incorporate ICA T3066-0005-0101, Revision D, dated March 10, 2004 (or later version).
(Inspections to determine the condition of the wiring and connector interfaces every 16,000 flight hours.)
ST00053BO Goodrich Corporation B727, -100, -100C, -200, -200F, 727C FQIS indicators with Volumetric Top-off (VTO) and optional fuel system unit (FSU), In-tank harnesses.
STC amended April 19, 2004.
Operators must incorporate ICA T3065-0005-0101, Revision D, dated March 10, 2004 (or later version).
(Inspections to determine the condition of the wiring and connector interfaces every 16,000 flight hours) Note: These STCs have mandatory actions associated with them in accordance with Title 14 of the Code of Federal Regulations (14 CFR) §§ 91.1507, 121.1113,
125.507, and 129.113. Other STCs may be addressed via Airworthiness Directives (AD).
Appendix C C-1 APPENDIX C. DEFINITIONS C.1 Aircraft Certification Service (AIR). The office having oversight responsibility for the relevant TC or STC as determined by the Administrator. (See Appendix D, Aircraft Certification Service (AIR) Offices by Airplane Manufacturer, for a list of offices for certain transport airplane TC holders.)
C.2 Aircraft Evaluation Division (AED). FS representatives who know the operational and maintenance aspects of the certification project and are responsible for determining the operational acceptability and continuing airworthiness requirements of newly certified or modified aircraft, engines, and propellers intended to be operated under the provisions of 14 CFR. This function includes providing the cognizant Aircraft Certification Service office support in the review and approval of the initial and subsequent changes to the type design.
C.3 Aircraft Maintenance Manual (AMM). A manual developed by the manufacturer of a particular airplane that contains information necessary for the continued airworthiness of that airplane.
C.4 Airworthiness Limitation. Mandatory maintenance of the fuel system that includes CDCCL, inspections, or other procedures determined necessary to ensure that fuel tank ignition sources do not occur and are not introduced into the fuel system as a result of maintenance actions, repairs, or alterations throughout the operational life of the airplane.
C.5 Airworthiness Limitation Item (ALI). A term used by some DAH to group maintenance/inspection type fuel tank airworthiness limitations separately from CDCCL type fuel tank ALs.
C.6 Airworthiness Limitations Section (ALS). “Airworthiness Limitations” is the title required by 14 CFR part 25 appendix H, § H25.4(a) and (a)(2) for the section of the ICA that contains “each mandatory replacement time, inspection interval, related inspection procedure, and all critical design configuration control limitations approved under Sec. 25.981 for the fuel tank system.”
C.7 Airworthy. An aircraft, aircraft engine, or component that conforms to its type certificate and is in a condition for safe operation.
C.8 Auxiliary Tanks. Fuel tanks installed which make additional fuel available to increase the flight range of that airplane and are secondary to the airplane’s main fuel tanks.
Auxiliary tanks have been installed in various locations including center wing structure, horizontal stabilizers, wings, and cargo compartments.
C.9 AMOC. Alternative method of compliance.
C.10 CMM Deviation.
C.10.1 Term used for approval of changes to CMMs that are the subject of CDCCLs adopted by a type design change.
Appendix C C-2 C.10.2 Term used for the approval of changes to CMMs referenced in CDCCLs that are mandated by ADs, provided the CDCCL includes wording that allows use of “later approved” CMMs. Otherwise, approval is granted as an AMOC to the AD. As with AMOC approvals, a CMM deviation approval is by a letter from the responsible Aircraft Certification Service office.
C.10.3 Component Maintenance Manual (CMM). A manual developed by a manufacturer that contains information necessary for the continued airworthiness of a particular component.
C.11 Continued Airworthiness. Certified aircraft, engines, propellers, and appliances are safe to operate for the intended purpose; they are maintained safely throughout their service life; the product meets its type design; and is in a condition for safe operation.
C.12 Critical Design Configuration Control Limitation (CDCCL). A CDCCL is an airworthiness limitation required by 14 CFR §§ 25.981 and H25.4 that defines those parameters of the design that must be maintained to ensure that ignition sources will not develop within the fuel tank. CDCCLs include any information necessary to maintain those design features that have been determined by analysis of the fuel tank system as needed to preclude development of ignition sources. This information is essential to ensure that maintenance, repairs, or alterations do not unintentionally violate the integrity of the original type design of the fuel tank system.
C.13 Design Approval Holder (DAH). The holder of any design approval, including TC, amended TC, STC, amended STC, Parts Manufacturer Approval (PMA), Technical Standard Order (TSO) authorization, letter of TSO design approval, and field approvals (refer to FAA Form 337).
C.14 Exceptional Short-Term Extension. An increase in a fuel system ALI interval that may be used by the operator to cover an uncontrollable or unexpected situation where the ALI cannot be performed within the ALI timeframe.
C.15 Electrical Arc or Spark. The transfer of electrons across a gap.
C.16 Enhanced Zonal Analysis Procedure (EZAP). An analytical process for developing maintenance and inspection instructions for the EWIS.
C.17 Electrical Wiring Interconnection System (EWIS). Any wire, wiring device, or combination of these, including termination devices, installed in the airplane for transmitting electrical energy between two or more termination points.
C.18 Failure Effect Category (FEC).
1. Category 5. Functional failures that have evident safety effects.
2. Category 6. Functional failures that have evident operational effects.
3. Category 7. Functional failures that have evident economic effects.
Appendix C C-3
4. Category 8. Functional failures that have hidden function safety effects.
5. Category 9. Functional failures that have hidden function non- safety effects.
C.19 Field Approval. A method for obtaining FAA approval of a design change to the airplane. An FAA FS inspector can approve the design change using FAA Form 337.
C.20 Flammable. With respect to a fluid or gas, flammable means susceptible to igniting readily or to exploding (refer to 14 CFR Part 1, Definitions and Abbreviations).
C.21 Flammable Fluid Leakage Zones. Any area where flammable liquids or vapors are not intended to be present, but where they might exist due to leakage from flammable fluid carrying components (e.g., leakage from tanks, lines). Examples of these areas include:
• The wing leading (including any adjacent compartment such as the strut) and trailing edges;
• Fairings located below the fuel tanks;
• Wheel wells;
• Fuel pump enclosures;
• Unpressurized areas of the fuselage surrounding fuel tanks; and
• Areas containing flammable fluid lines or tanks.
C.22 Flight Standards(FS). Offices responsible for developing guidance and policy applicable to transport category airplanes for AEG personnel and FS field personnel (maintenance, avionics, and Operations ASI in the conduct of their responsibilities.
C.23 Fuel System Airworthiness Limitation. An airworthiness limitation that contains “each mandatory replacement time, inspection interval, related inspection procedure, and all CDCCL approved under 14 CFR § 25.981 for the fuel tank system.”
C.24 Functional Failures. The failure of a component or subsystem to perform its intended function within specified limits.
C.25 Hidden Failure. A failure whose presence may not be readily apparent to the flightcrew or maintenance personnel.
C.26 Hidden Functional Failure Safety Effect. A combination of a hidden (or latent) functional failure and one additional failure of a system-related or backup function that will have an adverse effect on operational safety.
C.27 Hot Short. Electrical energy introduced into equipment or systems as a result of unintended contact with a power source, such as bent pins in a connector or damaged insulation on adjacent wires.
C.28 Instructions for Continued Airworthiness (ICA). The information developed in accordance with applicable airworthiness requirements that include the applicable
Appendix C C-4 inspection tasks, intervals, methods, processes, procedures, and airworthiness limitations to keep the product Airworthy throughout its operational life.
C.29 Maintenance and Inspection Instructions. Information that provides, for each part of the airplane and its engine auxiliary power units, propellers, accessories, instruments, and equipment, the recommended periods at which they should be cleaned, inspected, adjusted, tested, lubricated, and the degree of inspection, the applicable wear tolerances, and work recommended at these periods needed to provide for the continued airworthiness of the airplane. The recommended overhaul periods and necessary cross-reference to the airworthiness ALS of the manual are also included.
C.30 Maintenance Planning Data (MPD). Data developed by the manufacturer of a particular airplane that contain the information each operator of that airplane needs to develop a customized, scheduled maintenance program.
C.31 Maintenance Review Board (MRB). An FAA group that supports industry development of the MRBR and approves the final MRBR.
C.32 Maintenance Review Board Report (MRBR). A report which contains the initial minimum scheduled maintenance and inspection requirements for a particular transport category airplane and on-wing engine program. Air carriers may use those provisions, along with other maintenance information contained in the ICA, in the development of their maintenance programs.
C.33 Maintenance Significant Items (MSI).
C.33.1 Under MSG-3, items other than ALI that are identified by the DAH whose failure could cause one of the following effects:
1. It could affect safety on the ground or in flight,
2. It could be undetectable during operations,
3. It could have a significant impact on operations, or
4. It could have a significant economic impact.
C.33.2 In terms of development of maintenance and inspection instructions, MSIs include systems, subsystems, modules, components, accessories, units, or parts.
C.34 Maintenance Steering Group - 3 (MSG-3). A voluntary structured process developed by the industry and maintained by Airlines for America (A4A) to make decisions used to develop maintenance and inspection tasks and intervals for an airplane.
C.35 Maintenance Working Group (MWG). A working group of maintenance specialists from participating operators, the prime manufacturer, and the regulatory authority whose function is to develop airplane maintenance programs. The MWG should have representatives knowledgeable about the fuel tank system under analysis and about the requirements of SFAR 88.
Appendix C C-5 C.36 Mandatory Action Advisory Board. A committee composed of representatives from the responsible Aircraft Certification Service office whose function was to review the findings from the SFAR 88 safety review for determination of an unsafe condition using the criteria in FAA policy memorandum 2003-112-15, SFAR 88—Mandatory Action Decision Criteria.
C.37 National Aviation Authority (NAA). The aviation authority responsible for the certification and continued airworthiness of those airplanes having a U.S. TC within its state of design as established in accordance with agreements with the United States.
C.38 Products. Products are certified aircraft, engines, propellers, and appliances.
C.39 Supplemental Type Certificate (STC) ICA. The STC holder ICA consists of the inspection tasks, intervals, methods, processes, and procedures to keep an alteration affecting the fuel tank system approved under an STC Airworthy throughout its operational life. The STC holder ICA must meet the requirements of SFAR 88 or 14 CFR § 25.981 and part 25 appendix H, and be approved by the responsible Aircraft Certification Service office.
C.40 Type Certificate (TC) Holder ICA. The TC holder ICA consists of the inspection tasks, intervals, methods, processes, and procedures to keep the product’s fuel tank system Airworthy throughout its operational life. It is typically the result of the MRB process.
During this process the TC holder develops MSIs and subjects them to maintenance program development logic, such as in MSG-3 or later revisions. The TC holder ICA must comply with the requirements of SFAR 88 or 14 CFR § 25.981 and part 25 appendix H, and be approved by the responsible Aircraft Certification Service office.
Appendix D D-1 APPENDIX D. AIRCRAFT CERTIFICATION SERVICE (AIR) OFFICES BY
AIRPLANE MANUFACTURER Airplane Manufacturer Aircraft Certification Service (AIR) Office ATR—GIE Avions de Transport Régional International Validation Branch (AIR-730) Airbus International Validation Branch (AIR-730) BAE Systems International Validation Branch (AIR-730) Boeing—Seattle Area West Certification Branch (AIR-770) and/or Integrated Certificate Management Division (AIR-500) Boeing—Long Beach (McDonnell-Douglas) West Certification Branch (AIR-770) and/or Integrated Certificate Management Division (AIR-500) Bombardier East Certification Branch (AIR-750) EADS CASA International Validation Branch (AIR-730) de Havilland East Certification Branch (AIR-750) Dornier International Validation Branch (AIR-730) Embraer International Validation Branch (AIR-730) Fokker International Validation Branch (AIR-730) Lockheed Martin East Certification Branch (AIR-750) SAAB International Validation Branch (AIR-730)
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Subject: AC 120-97B, Incorporation of Fuel Tank System Instructions for Continued Airworthiness into Operator Maintenance and/or Inspection Programs Date: _____________________ Please mark all appropriate line items:
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Submitted by: Date: ______________________ FAA 1320-73 (01/25) SUPERSEDES PREVIOUS EDITIONS