FAR 91.9 — Flight Manual and Placards
FAR 91.9 requires pilots to follow the AFM/RFM operating limitations, carry the approved flight manual, and ensure proper markings, placards, and aircraft ID.
In Plain English
FAR 91.9 sets the rules for operating a civil aircraft within its approved limitations and ensuring required documents and markings are on board.
Key requirements:
- Operate within limitations: You may not fly a civil aircraft outside the operating limitations in its approved Airplane Flight Manual (AFM) or Rotorcraft Flight Manual (RFM), markings, and placards.
- AFM required by §21.5: A current, approved AFM or RFM (or the §121.141(b) manual) must be available in the aircraft.
- AFM not required by §21.5: A current approved flight manual, approved manual material, markings, and/or placards must still be available.
- Aircraft identification: The aircraft must be identified per Part 45 or Part 48 (registration and ID plates).
- Limited exception: Part 29 helicopters at over-water heliports may briefly fly through the height-velocity "avoid" envelope if a safe ditching is possible and the aircraft has flotation gear.
This matters operationally because the AFM is the legal source for V-speeds, weight and balance, systems limits, and emergency procedures — flying outside it is a regulatory violation and a safety risk.
Regulation Text
14 CFR § 91.9§ 91.9 Civil aircraft flight manual, marking, and placard requirements.
(a) Except as provided in paragraph (d) of this section, no person may operate a civil aircraft without complying with the operating limitations specified in the approved Airplane or Rotorcraft Flight Manual, markings, and placards, or as otherwise prescribed by the certificating authority of the country of registry.
(b) No person may operate a U.S.-registered civil aircraft—
(1) For which an Airplane or Rotorcraft Flight Manual is required by § 21.5 of this chapter unless there is available in the aircraft a current, approved Airplane or Rotorcraft Flight Manual or the manual provided for in § 121.141(b); and
(2) For which an Airplane or Rotorcraft Flight Manual is not required by § 21.5 of this chapter, unless there is available in the aircraft a current approved Airplane or Rotorcraft Flight Manual, approved manual material, markings, and placards, or any combination thereof.
(c) No person may operate a U.S.-registered civil aircraft unless that aircraft is identified in accordance with part 45 or 48of this chapter.
(d) Any person taking off or landing a helicopter certificated under part 29 of this chapter at a heliport constructed over water may make such momentary flight as is necessary for takeoff or landing through the prohibited range of the limiting height-speed envelope established for the helicopter if that flight through the prohibited range takes place over water on which a safe ditching can be accomplished and if the helicopter is amphibious or is equipped with floats or other emergency flotation gear adequate to accomplish a safe emergency ditching on open water.
[Docket 18334, 54 FR 34292, Aug. 18, 1989, as amended by ; Docket FAA-2022-1355, Amdt. 91-366, 87 FR 75846, Dec. 9, 2022]
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You are flying VFR in Class E airspace at 8,500 feet MSL during the day. What are your minimum visibility and cloud clearance requirements?
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Oral Exam Questions a DPE Might Ask
Q1What documents or materials related to the flight manual must be on board a U.S.-registered civil aircraft?
Per FAR 91.9(b), if an AFM is required by §21.5 a current, approved Airplane or Rotorcraft Flight Manual must be in the aircraft; if not required, then current approved manual material, markings, and placards (or a combination) must be available.
Q2Are you legally required to operate within the limitations published in the AFM?
Yes. FAR 91.9(a) prohibits operating a civil aircraft without complying with the operating limitations in the approved Airplane or Rotorcraft Flight Manual, markings, and placards.
Q3How must a U.S.-registered civil aircraft be identified?
FAR 91.9(c) requires the aircraft to be identified in accordance with Part 45 or Part 48 of the regulations, which cover identification plates and registration markings.
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