§ 121.139 - Manual accessibility: Supplemental operations.

§ 121.139 Requirements for manual aboard aircraftManual accessibility: Supplemental operations.

Cross Reference

Link to an amendment published at 88 FR 34443, May 30, 2023.

(a) Except is provided in paragraph (b) of this section, each

Each certificate holder conducting supplemental operations

shall carry

must ensure the appropriate parts of the manual

on each airplane when away from the principal base of operations. The appropriate parts must be available for use by ground or flight personnel. If the certificate holder carries aboard an airplane all or any portion of the maintenance part of its manual in other than printed form, it must carry a compatible reading device that produces a legible image of the maintenance information and instructions or a system that is able to retrieve the maintenance information and instructions in the English language.

(b) If a certificate holder conducting supplemental operations is able to perform all scheduled maintenance at specified stations where it keeps maintenance parts of the manual, it does not have to carry those parts of the manual aboard the aircraft en route to those stations.

[Doc. No. 6258, 29 FR 19196, Dec. 31, 1964, as amended by Amdt. 12–71, 35 FR 17176, Nov. 7, 1970; Amdt. 121–253, 61 FR 2611, Jan. 26, 1996; Amdt. 121–262, 62 FR 13256, Mar. 19, 1997; 62 FR 15570, Apr. 1, 1997

are accessible to flight, ground, and maintenance personnel at all times when such personnel are performing their assigned duties. The information and instructions contained in the manual must be displayed clearly and be retrievable in the English language.

[Docket No. FAA–2022–0912; Amdt. No. 121–388, 88 FR 34443, May 30, 2023]