CS 25.1411 General — CS-25

IRImplementing rule

CS 25.1411General

(a)Accessibility. Required safety equipment to be used by the crew in an emergency must be readily accessible.

(b)Stowage provisions. Stowage provisions for required emergency equipment must be furnished and must –

(1)Be arranged so that the equipment is directly accessible and its location is obvious; and

(2)Protect the safety equipment from inadvertent damage.

(c)Emergency exit descent device. The stowage provisions for the emergency exit descent device required by CS 25.810(a) must be at the exits for which they are intended.

(d)Liferafts

(1)The stowage provisions for the liferafts described in CS 25.1415 must accommodate enough rafts for the maximum number of occupants for which certification for ditching is requested.

(2)Life rafts must be stowed near exits through which the rafts can be launched during an unplanned ditching.

(3)Rafts automatically or remotely released outside the aeroplane must be attached to the aeroplane by means of the static line prescribed in CS 25.1415.

(4)The stowage provisions for each portable life raft must allow rapid detachment and removal of the raft for use at other than the intended exits.

(e)Long-range signalling device. The stowage provisions for the long-range signalling device required by CS 25.1415 must be near an exit available during an unplanned ditching.

(f)Life-preserver stowage provisions. The stowage provisions for life preservers described in CS 25.1415 must accommodate one life preserver for each occupant for which certification for ditching is requested. Each life preserver must be within easy reach of each seated occupant.

(g)Life line stowage provisions. If certification for ditching under CS 25.801 is requested, there must be provisions to store the lifelines. These provisions must –

(1)Allow one life line to be attached to each side of the fuselage; and

(2)Be arranged to allow the lifelines to be used to enable the occupants to stay on the wing after ditching. This requirement is not applicable to aeroplanes having no over-wing ditching exits.

[Amdt 25/5]

IR · CS 25.1411 — CS-25 · ED Decision 2008/006/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

AMCAcceptable means of compliance

AMC 25.1411(f)Life preserver stowage provisions

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The applicant should demonstrate that the life preserver is within easy reach of, and can be readily removed by, a seated and belted occupant (shoulder strap(s) may be removed prior to the demonstration), for all seat orientations and installations that are intended for use during taxi, take-off and landing. In lieu of an actual life preserver, a representative object (e.g. of the same size and weight) may be utilised for testing. The evaluation to quickly retrieve the preserver is to begin with the occupant moving their hand(s) from the seated position to reach for the preserver and to end with the occupant having the preserver in their hand(s) and fully removed from the stowage container. It does not include the time for the occupant to return to the upright position, to remove a pull strap from the preserver (if used) or to open the preserver package provided by the preserver manufacturer. The applicant should test the critical configuration(s) to demonstrate retrieval of the life preserver in less than 10 seconds by a minimum of 5 test subjects with a success rate of no less than 75 %. The test should evaluate three anticipated occupant test subject size categories: the 5th, 50th and 95th percentile. At least one occupant from each size category should demonstrate successful retrieval within 10 seconds. No more than 40 % of the overall test subject population should be in the 5th or 95th percentile occupant categories. 1) For passenger seats, the test subjects should be naïve. For the purpose of this test, naïve test subjects should be defined as follows: they should have had no experience within the prior 24 months in retrieving a life preserver. The subjects should receive no retrieval information other than a typical preflight briefing. The occupant size categories to be evaluated should be defined as: a. A 5th percentile occupant is no taller than 1.5 m (60 in). b. A 50th percentile occupant is at least 1.6 m (63 in) tall but no taller than 1.8 m (70 in). c. A 95th percentile occupant weighs at least 110.7 kg (244 lb). 2) For flight attendant and observer seats, the test subjects do not need to be naïve. The occupant size categories to be evaluated should be defined as: a. A 5th percentile occupant is no taller than 1.5 m (60 in). b. A 50th percentile occupant is at least 1.6 m (63 in) tall but no taller than 1.8 m (70 in). c. A 95th percentile occupant weighs at least 110.7 kg (244 lb). 3) For pilot/co-pilot seats, the test subjects do not need to be naïve. The occupant size categories to be evaluated should be defined as: a. A 5th percentile occupant is no taller than 1.57 m (62 in). b. A 50th percentile occupant is at least 1.6 m (63 in) tall but no taller than 1.8 m (70 in). c. A 95th percentile occupant weighs at least 110.7 kg (244 lb).

[Amdt 25/26]

AMC · AMC 25.1411(f) — CS-25 · ED Decision 2020/024/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023