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  4. Part 121
  5. § 121.1113
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14 CFR · Part 121

14 CFR § 121.1113

Fuel tank system maintenance program.

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Read in Subpart AA
Part 121 Contents
  • Subpart A: General
  • Subpart E: Approval of Routes: Domestic and Flag Operations
  • Subpart F: Approval of Areas and Routes for Supplemental Operations
  • Subpart G: Manual Requirements
  • Subpart H: Aircraft Requirements
  • Subpart I: Airplane Performance Operating Limitations
  • Subpart J: Special Airworthiness Requirements
  • Subpart K: Instrument and Equipment Requirements
  • Subpart L: Maintenance, Preventive Maintenance, and Alterations
  • Subpart M: Airman and Crewmember Requirements
  • Subpart N: Training Program
  • Subpart O: Crewmember Qualifications
  • Subpart P: Aircraft Dispatcher Qualifications and Duty Time
  • Subpart Q: Flight Time Limitations and Rest Requirements: Domestic Operations
  • Subpart R: Flight Time Limitations: Flag Operations
  • Subpart S: Flight Time Limitations: Supplemental Operations
  • Subpart T: Flight Operations
  • Subpart U: Dispatching and Flight Release Rules
  • Subpart V: Records and Reports
  • Subpart W: Crewmember Certificate: International
  • Subpart X: Emergency Medical Equipment and Training
  • Subpart Y: Advanced Qualification Program
  • Subpart Z: Hazardous Materials Training Program
  • Subpart AA: Continued Airworthiness and Safety Improvements
  • Subpart DD: Special Federal Aviation Regulations
  • Appendix A to Part 121: First Aid Kits and Emergency Medical Kits
  • Appendix B to Part 121: Airplane Flight Recorder Specification
  • Appendix C to Part 121: C-46 Nontransport Category Airplanes
  • Appendix D to Part 121: Criteria for Demonstration of Emergency Evacuation Procedures Under § 121.291
  • Appendix E to Part 121: Flight Training Requirements
  • Appendix F to Part 121: Proficiency Check Requirements
  • Appendix G to Part 121: Doppler Radar and Inertial Navigation System (INS): Request for Evaluation; Equipment and Equipment Installation; Training Program; Equipment Accuracy and Reliability; Evaluation Program
  • Appendix H to Part 121: Advanced Simulation
  • Appendix K to Part 121: Performance Requirements for Certain Turbopropeller Powered Airplanes
  • Appendix L to Part 121: Type Certification Regulations Made Previously Effective
  • Appendix M to Part 121: Airplane Flight Recorder Specifications
  • Appendix O to Part 121: Hazardous Materials Training Requirements For Certificate Holders
  • Appendix P to Part 121: Requirements for ETOPS and Polar Operations
(a)

Except as provided in paragraph (g) of this section, this section applies to transport category, turbine-powered airplanes with a type certificate issued after January 1, 1958, that, as a result of original type certification or later increase in capacity, have—

(1)

A maximum type-certificated passenger capacity of 30 or more, or

(2)

A maximum payload capacity of 7500 pounds or more.

(b)

For each airplane on which an auxiliary fuel tank is installed under a field approval, before June 16, 2008, the certificate holder must submit to the responsible Aircraft Certification Service office proposed maintenance instructions for the tank that meet the requirements of Special Federal Aviation Regulation No. 88 (SFAR 88) of this chapter.

(c)

After December 16, 2008, no certificate holder may operate an airplane identified in paragraph (a) of this section unless the maintenance program for that airplane has been revised to include applicable inspections, procedures, and limitations for fuel tanks systems.

(d)

The proposed fuel tank system maintenance program revisions must be based on fuel tank system Instructions for Continued Airworthiness (ICA) that have been developed in accordance with the applicable provisions of SFAR 88 of this chapter or § 25.1529 and part 25, Appendix H, of this chapter, in effect on June 6, 2001 (including those developed for auxiliary fuel tanks, if any, installed under supplemental type certificates or other design approval) and that have been approved by the responsible Aircraft Certification Service office.

(e)

After December 16, 2008, before returning an aircraft to service after any alteration for which fuel tank ICA are developed under SFAR 88 or under § 25.1529 in effect on June 6, 2001, the certificate holder must include in the maintenance program for the airplane inspections and procedures for the fuel tank system based on those ICA.

(f)

The fuel tank system maintenance program changes identified in paragraphs (d) and (e) of this section and any later fuel tank system revisions must be submitted to the Principal Inspector for review and approval.

(g)

This section does not apply to the following airplane models:

(1)

Bombardier CL-44

(2)

Concorde

(3)

deHavilland D.H. 106 Comet 4C

(4)

VFW-Vereinigte Flugtechnische Werk VFW-614

(5)

Illyushin Aviation IL 96T

(6)

Bristol Aircraft Britannia 305

(7)

Handley Page Herald Type 300

(8)

Avions Marcel Dassault—Breguet Aviation Mercure 100C

(9)

Airbus Caravelle

(10)

Lockheed L-300

Regulations Referenced

SFAR No. 8814 CFR 25.152914 CFR Part 25

Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.

Primary Source

  • Official Source (14 CFR · Part 121)