Appendix 2 to ETSO-C127c – Elective MPS For Rotorcraft, Transport Aeroplane, and Small Aeroplane Seating Systems

Compliance with the MPS described in these paragraphs is elective; however, the MPS must be followed for the MPS with which the applicant has elected to comply. Deviations from an elective MPS must be approved by EASA. Applicants should document and report which elective MPS subparagraphs they complied with so they can receive credit under this ETSO. In addition, see ETSO paragraph 4(a)(1) for the marking requirements.

a. Step Load on Baggage Bars: For seats where the baggage restraint allows application of a foot step load, apply the test criteria of ARP5526D, subsection 3.7.2. The testing must not degrade either the basic forward nor the side load carrying capabilities noted in AS8049C Table 4A, nor result in deformation, thus posing a tripping hazard.

b. Electrically Actuated Features: For seats with electrically actuated moving parts, which could potentially entrap and cause injury to passengers, apply ARP5526D, subsection 3.18.2.

c. Secondary Structure Abuse Loads: For seats that include the features listed in ARP5526D, Section 3.26.2, Table 9, apply the loads within the table to qualify the design.

d. Testing to Higher Static Loads: To substantiate seats to load factors higher than those specified in Table 4A of AS8049C, or to combine load factors, the higher load factors must be reported. The higher load factors must be marked on the ETSO placard.

e. Hand Holds: For seats designed to provide a handhold for passengers moving about the aeroplane, apply ARP5526D, Section 3.1.2.

f. Batteries Containing Lithium: For seats with batteries containing lithium in their design, test and meet the requirements defined in ETSO-C142b (or later EASA-approved ETSO for non‑rechargeable lithium batteries) or ETSO-C179b (or later EASA-approved ETSO for rechargeable lithium batteries). An ETSO approval does not include installation approval in an aircraft, and special conditions may be required to gain installation approval if the design includes lithium batteries

g. Flammability — Large Exposed Non-metallic Parts: For Type A seats incorporating non-traditional, large non-metallic panels in their design, test and meet the fire protection provisions of Appendix F, Parts IV and V (heat release and smoke emission) of CS-25. Demonstrate the fire protection properties of the materials by using the methods provided in FAA policy statement PS ANM-25.853-01-R2, ‘Flammability Testing of Interior Materials’, which may permit substantiation based on previously tested materials, and SAE ARP6199A, ‘Method to Evaluate Aircraft Passenger Seats for the Test Requirements of 14 CFR Part 25 Appendix F, Parts IV and V’. Although ARP6199A provides an acceptable compliance method for determining which panels on the seat must be evaluated and substantiated to comply with certain special conditions, the intent is to limit the quantities of materials that do not comply with the smoke emission and heat release test requirements.

In addition, report which parts meet the requirements of Appendix F, Parts IV and V, as part of your ETSO-furnished data.

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