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Legal Interpretations

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Elmy-USDA 2011

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Summary

The Question

Does 14 CFR 91.9(b)(1) require an aircraft to carry the latest revision of its Rotorcraft Flight Manual rather than the version provided when it was purchased?

Background

The USDA Forest Service, Intermountain Region, asked whether the Rotorcraft Flight Manual (RFM) provided at purchase counts as the "current" approved RFM, and whether the answer would differ for a Part 135 operator.

The FAA’s Interpretation

No. Applying a 2008 interpretation that read "current" narrowly under the Administrative Procedure Act, the current RFM is the version in place when the aircraft was purchased plus any later changes mandated by an Airworthiness Directive. Later revisions not mandated by an AD or other rulemaking are not included because they did not go through notice-and-comment rulemaking. The FAA could not answer for 14 CFR part 135 because no specific provisions were identified.

Requester
Elmy
Organization
USDA
Issued
December 8, 2011
Subjects
General Operating & Flight Rules · Air Carrier & Commercial Operations · Aircraft & Parts Certification

Regulations Cited

  • 14 CFR Part 21
  • 14 CFR Part 25
  • 14 CFR 91.9
  • 14 CFR 91.409
  • 14 CFR Part 121
  • 14 CFR Part 135

Page 1

U.S. Department
of Tra nsportation
Federal Aviation
Administration
Gil Elmy
Forest Service, USDA
Intermountain Region
3515 Airport Rd.
Ogden, UT 84405
Dear Mr. El my,
Office of the Chief Counsel BOO Independence Ave., S.W.
Washington, D.C. 20591

Uc\; o l.ud

This is in response to your letter requesting an interpretation of 14 C.F.R. § 91.9(b)(I). In your letter, you asked whether the Rotorcraft Flight Manual (RFM) which was provided at the time that an aircraft was purchased would be considered the "current" RFM for the purposes of§ 91.9(b)(I) or whether the operator would need to have the latest revision of this RFM in order to legally operate the aircraft. You also asked · whether this interpretation would remain the same for a part 135 operator. Section 91.9(b)(l) prohibits operation of an aircraft for which an RFM is required if that aircraft does not contain a copy of the "current" approved RFM. The FAA first addressed the meaning of "current" in an interpretation that was issued in 1998. 1 The 1998 interpretation stated that the word "current", as used in ~n operational regulation, imposed an ongoing obligation to keep the latest copy of the RFM in the aircraft. However, the 1998 interpretation did not address the issue of whether this positio·n complied with the Administrative Procedure Act (APA).2 · .

The FAA resolved this issue in a 2008 interpretation, which addressed the word "current" in the context of manufacturers' inspection programs.3 In that interpretation, the FAA found that construing the word " current" to encompass "subsequently issued changes to maintenance manuals or inspection programs" would violate the AP A. This is because certain regulations require the regulated parties to comply with the current maintenance manuals and inspection programs. 4 If the word "current" in ~hose regulations is construed to encompass subsequent changes that a third party makes to a maintenance manual or inspection program~ then by making those changes the third party would be able to impose significant additional regulatory burdens without first going through the 1 See Oct. 8, 1998, Memorandum concerning Legal Interpretation of Certain Provisions of Parts 21 , 25, 91, and 121 from Assistant Chief Counsel for Regulations, AGC-200.

2 id. at.4 n. I .

3 See Dec. 5, 2008, Memorandum concerning Legal Interpretation of 14 C.F.R. § 91.409(f){3) issued to Manager, Aircraft Maintenance Division, AFS-300, from Assistant Chief Counsel for Regulations, AGC-200.

4 See. e.g., 14 C.F.R. § 91.409(f){3).

Page 2

notice and comment process required by the APA.5 Thus, in order to comply with the AP A, the 2008 interpretation construed the word "current" more narrowly so that this word did not impose an ongoing obligation, but rather, in the context of the regulation at issue, applied only to a manufacturer's inspection program that was in place at the time that it was adopted by the owner or operator.

However, an RFM that was provided with the aircraft at the time the aircraft was purchased may subsequently be amended by an Airworthiness Directive (AD). The RFM, as modified by the AD, would be considered a "current, approved" RFM for purposes of§ 91.9(b)(1). This is because an AD is issued pursuant to thelrocedures specified in the APA - usually through notice and comment rulemaking. As such, construing the word "current" in the regulations to encompass obligations imposed by an AD would not violate the AP A.

Applying the above discussion to this case, the word "current", as it is used in § 91.9(b)(1), refers to the version of the RFM that was in place at the time that the aircraft in question was purchased and includes any subsequent AD-mandated changes that were made to the RFM. The word "current" does not encompass any subsequent changes that were made to the RFM that were not mandated by an AD or other rulemaking because those changes did not go through the notice and comment rulemaking process. With regard to your question about whether this interpretation would also apply to a part 135 operator, because your letter does not indicate the specific provisions of part 135 that are at issue, the FAA cannot answer your question at this time. We appreciate your patience and trust that the above responds to your concerns. If you need further assistance, please contact my staff at (202) 267-3073. This response was

prepared by Alex Zektser, Attorney, Regulations Division of the Office of the Chief Counsel, and coordinated with the General Aviation and Commercial Division of Flight Standards Service.

Sincerely,

Rf::;i.;:ers!~

Assistant Chief Counsel for Regulations, AGC-200

5 See 5 U.S.C. § 553 (requiring notice and comment for rulemaking). 6 See 14 C.F.R. § l l.2l(b).

Regulations Referenced

14 CFR 91.914 CFR Part 13514 CFR Part 2114 CFR 91.409

Snapshot retrieved August 6, 2026.

Summary

The Question

Does 14 CFR 91.9(b)(1) require an aircraft to carry the latest revision of its Rotorcraft Flight Manual rather than the version provided when it was purchased?

Background

The USDA Forest Service, Intermountain Region, asked whether the Rotorcraft Flight Manual (RFM) provided at purchase counts as the "current" approved RFM, and whether the answer would differ for a Part 135 operator.

The FAA’s Interpretation

No. Applying a 2008 interpretation that read "current" narrowly under the Administrative Procedure Act, the current RFM is the version in place when the aircraft was purchased plus any later changes mandated by an Airworthiness Directive. Later revisions not mandated by an AD or other rulemaking are not included because they did not go through notice-and-comment rulemaking. The FAA could not answer for 14 CFR part 135 because no specific provisions were identified.

Requester
Elmy
Organization
USDA
Issued
December 8, 2011
Subjects
General Operating & Flight Rules · Air Carrier & Commercial Operations · Aircraft & Parts Certification

Regulations Cited

  • 14 CFR Part 21
  • 14 CFR Part 25
  • 14 CFR 91.9
  • 14 CFR 91.409
  • 14 CFR Part 121
  • 14 CFR Part 135