Section 105.43 - Use of single-harness, dual-parachute systemsNo person may conduct a parachute operation using a single-harness, dual-parachute system, and no pilot in command of an aircraft may allow any person to conduct a parachute operation from that aircraft using a single-harness, dual-parachute system, unless that system has at least one main parachute, one approved reserve parachute, and one approved single person harness and container that are packed as follows:
(a) The main parachute must have been packed within 180 days before the date of its use by a certificated parachute rigger, the person making the next jump with that parachute, or a non-certificated person under the direct supervision of a certificated parachute rigger.(b) The reserve parachute must have been packed by a certificated parachute rigger-(1) Within 180 days before the date of its use, if its canopy, shroud, and harness are composed exclusively of nylon, rayon, or similar synthetic fiber or material that is substantially resistant to damage from mold, mildew, and other fungi, and other rotting agents propagated in a moist environment; or(2) Within 60 days before the date of its use, if it is composed of any amount of silk, pongee, or other natural fiber, or material not specified in paragraph (b)(1) of this section.(c) If installed, the automatic activation device must be maintained in accordance with manufacturer instructions for that automatic activation device.Doc. No. FAA-1999-5483, 66 FR 23553 , May 9, 2001, as amended by Amdt. 105-13, 73 FR 69531 , Nov. 19, 2008