Hi, question??, in a tandem equipment the drogue its part of the TSO, so the main drogue release ripcord as part of that system (1st or 2nd one) are part of the TSO right??
copy of TS135 paragraphs...
For purposes of this document a parachute assembly normally, but not exclusively, consists of the following major components:
a. Deployment control device such as a sleeve, bag, diaper, or functional equivalent.
b. Deployment initiation device (pilot chute, drogue, or functional equivalent) and bridle.
c. Canopy(s) including suspension lines, reefing device, and connector links (if used).
d. Riser(s), when not integral with harness and/or canopy.
e. Stowage container(s) or stowage pack(s).
f. Harness (es).
g. Primary actuation device (ripcord or functional equivalent).
h. Reserve static line.
i. Drogue canopy and bridle (if used with reserve and/or emergency parachutes).
j. Drogue release device (if used with reserve and/or emergency parachutes).
DROGUE PARACHUTE ASSEMBLY & RELEASE:
For reserve or emergency parachute assemblies, incorporating a drogue, the drogue release shall be tested at an equivalent force to the drag force generated at the MOW and MPOS.
The human release force shall not be less than 5 lbf (22.2N) and must not exceed 22 lbf (97.9N). The release shall meet the human-factors requirements of 4.3.3.
Nico Nicolas Lopez
Aerorigging Parachute Loft