[Federal Register Volume 81, Number 128 (Tuesday, July 5, 2016)]
[Rules and Regulations]
[Pages 43471-43472]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-15784]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No. FAA-2015-8298; Special Conditions No. 25-611-SC]


Special Conditions: JAMCO America, Inc., Boeing Model 777-300ER, 
Dynamic Test Requirements for Single-Occupant Oblique (Side-Facing) 
Seats With Inflatable Restraints

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final special condition; request for comments; corrections.

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SUMMARY: This document corrects omissions in docket no. FAA-2015-8298, 
special conditions no. 25-611-SC, which was published in the Federal 
Register on March 16, 2016 (81 FR 13969). The special conditions in the 
published document are incomplete. This correction replaces the entire 
special conditions section from that which appeared in the original 
Federal Register publication.

DATES: This action is effective on JAMCO America, Inc., on July 5, 
2016. We must receive your comments August 19, 2016.

FOR FURTHER INFORMATION CONTACT: John Shelden, FAA, Airframe and Cabin 
Safety Branch, ANM-115,Transport Airplane Directorate, Aircraft 
Certification Service, 1601 Lind Avenue SW., Renton, Washington 98057-
3356; telephone (425) 227-2785; facsimile (425) 227-1320.

SUPPLEMENTARY INFORMATION: On March 16, 2016, the Federal Register 
published a document designated as ``Docket No. FAA-2015-8298; Special 
Conditions No. 25-611-SC,'' (81 FR 13969). That document issued special 
conditions pertaining to dynamic test requirements for single-occupant 
oblique (side-facing) seats with inflatable restraints on Boeing Model 
777-300ER airplanes. As published, the special conditions are 
incomplete. The applicant was aware of the complete set of conditions 
at the time of the original, incomplete publication.

Correction

    The following special conditions replace the entire special 
conditions section of the final special conditions document [FR Doc. 
2016-05995 Filed 3-15-16; 8:45 a.m.], published on March 16, 2016 (81 
FR 13969). The introductory language was previously published and is 
not changed.

The Special Conditions

0
Accordingly, pursuant to the authority delegated to me by the 
Administrator, the following special conditions are issued as part of 
the type certification basis for Boeing Model 777-300ER airplanes 
modified by JAMCO.

Oblique (Side-Facing) Seats Special Conditions

    In addition to the requirements of Sec.  25.562:

1. Head Injury Criteria (HIC)

    Compliance with Sec.  25.562(c)(5) is required, except that, if the 
anthropomorphic test device (ATD) has no apparent contact with the seat 
and related structure but has contact with an airbag, a HIC unlimited 
score in excess of 1000 is acceptable, provided the HIC15 score 
(calculated in accordance with 49 CFR 571.208) for that contact is less 
than 700.

2. Body-to-Wall/Furnishing Contact

    If a seat is installed aft of structure (e.g. interior wall or 
furnishings) that does not provide a homogenous contact surface for the 
expected range of occupants and yaw angles, then

[[Page 43472]]

additional analysis and tests may be required to demonstrate that the 
injury criteria are met for the area that an occupant could contact. 
For example, if different yaw angles could result in different airbag 
device performance, then additional analysis or separate tests may be 
necessary to evaluate performance.

3. Neck Injury Criteria

    a. The seating system must protect the occupant from experiencing 
serious neck injury. The assessment of neck injury must be conducted 
with the airbag device activated, unless there is reason to also 
consider that the neck-injury potential would be higher for impacts 
below the airbag-device deployment threshold.
    b. The Nij, calculated in accordance with 49 CFR 
571.208, must be below 1.0, where Nij =Fz/
Fzc + My/Myc, and Nij 
critical values are:

i. Fzc = 1530 lb for tension
ii. Fzc = 1385 lb for compression
iii. Myc = 229 lb-ft in flexion
iv. Myc = 100 lb-ft in extension

    c. In addition, peak upper neck Fz must be below 937 lb 
in tension and 899 lb in compression.
    d. Rotation of the head about its vertical axis relative to the 
torso is limited to 105 degrees in either direction from forward-
facing.
    e. The neck must not impact any surface that would produce 
concentrated loading on the neck.

4. Spine and Torso Injury Criteria

    a. The lumbar spine tension (Fz) cannot exceed 1200 lb.
    b. Significant concentrated loading on the occupant's spine, in the 
area between the pelvis and shoulders during impact, including rebound, 
is not acceptable. During this type of contact, the interval for any 
rearward (X-axis direction) acceleration exceeding 20g must be less 
than 3 milliseconds as measured by the thoracic instrumentation 
specified in 49 CFR part 572, subpart E, filtered in accordance with 
SAE recommended practice J211/1, ``Instrumentation for Impact Test--
Part 1--Electronic Instrumentation.''
    c. The occupant must not interact with the armrest or other seat 
components in any manner significantly different than would be expected 
for a forward-facing seat installation.

5. Pelvis Criteria

    Any part of the load-bearing portion of the bottom of the ATD 
pelvis must not translate beyond the edges of the seat bottom seat-
cushion supporting structure.

6. Femur Criteria

    Axial rotation of the upper leg (about the Z-axis of the femur, per 
SAE J211/1) must be limited to 35 degrees in the strike direction from 
the normal seating position. Evaluation during rebound need not be 
considered.

7. ATD and Test Conditions

    Longitudinal tests conducted to measure the injury criteria above 
must be performed with the FAA Hybrid III ATD, as described in SAE 
1999-01-1609, ``A Lumbar Spine Modification to the Hybrid III ATD For 
Aircraft Seat Tests.'' The tests must be conducted with an undeformed 
floor, at the most-critical yaw cases for injury, and with all lateral 
structural supports (e.g. armrests or walls) installed.

Inflatable Lapbelt Special Conditions

    The inflatable lapbelts must meet special conditions no. 25-187A-
SC, ``Boeing Model 777 Series Airplanes; Seats with Inflatable 
Lapbelts.''
    1. Because this type of protection system may or may not activate 
during various crash conditions, the applicant must demonstrate that 
the injury criteria listed in these special conditions are not exceeded 
in an event which is slightly below the activation level of the airbag 
system.
    2. Additionally, as indicated in special conditions no. 25-187A-SC, 
inflatable lapbelts must be shown to not affect emergency-egress 
capabilities in the main aisle, cross-aisle, and passageway.

    Issued in Renton, Washington, on June 17, 2016.
Michael Kaszycki,
Assistant Manager, Transport Airplane Directorate, Aircraft 
Certification Service.
[FR Doc. 2016-15784 Filed 7-1-16; 8:45 am]
 BILLING CODE 4910-13-P