Source: https://www.federalregister.gov/articles/2011/02/25/2011-4223/special-conditions-boeing-model-787-8-airplane-overhead-crew-rest-compartment
Timestamp: 2014-04-17 03:56:15
Document Index: 169925557

Matched Legal Cases: ['art 25', '§ 25', 'art 25', '§ 21', 'art 34', 'art 36', '§ 25', '§ 25', '§ 25', '§ 25', '§ 25', '§ 25', '§ 25', '§ 25', '§ 25', '§ 25', '§ 25', '§ 25', '§ 25', 'art 25', 'art 25', '§ 25', '§ 25', '§ 25']

Federal Register | Special Conditions: Boeing Model 787-8 Airplane; Overhead Crew-Rest Compartment
-10482 (7 pages)
Document Number: 2011-4223
Shorter URL: https://federalregister.gov/a/2011-4223 Related Topics
Under provisions of Title 14 Code of Federal Regulations (14 CFR) 21.17, Boeing must show that the Boeing Model 787-8 airplane (hereafter referred to as “the 787”) meets the applicable provisions of 14 CFR part 25, as amended by Amendments 25-1 through 25-117, 25-120, 25-124, 25-125 and 25-128, except that § 25.1309 remains at Amendment 25-117 for cargo-fire protection systems. If the Administrator finds that the applicable airworthiness regulations (i.e., 14 CFR part 25) do not contain adequate or appropriate safety standards for the 787 because of a novel or unusual design feature, special conditions are prescribed under the provisions of § 21.16.
In addition to complying with the applicable airworthiness regulations and special conditions, the 787 must comply with the fuel-vent and exhaust-emission requirements of 14 CFR part 34, and the noise-certification requirements of 14 CFR part 36. In addition, the FAA must issue a finding of regulatory adequacy pursuant to section 611 of 92, the “Noise Control Act of 1972.”
The OCR compartment on the 787 identified by Boeing as an overhead flight-attendant rest is located above the main passenger cabin, adjacent to Door 4, and will be accessed from the main deck by stairs through a vestibule. This OCR compartment will contain six private berths, an emergency hatch that opens directly into the main passenger-cabin area, a smoke-detection system, an oxygen system, and various occupant amenities. This OCR compartment will only be occupied by trained crewmembers in flight. It will not be occupied during taxi, takeoff, or landing.
Discussion of Special Conditions Back to Top
Special Conditions 4 and 14 contain requirements for the exit signs that must be provided in the OCR compartment. Symbols that satisfy the equivalent level of safety finding established for the 787 may be used in lieu of the text required by § 25.812(b)(1)(i). The FAA expects that crewmembers will learn the meaning of any symbolic exit sign as a part of their training in evacuation procedures.
Special Condition 17 contains the requirement for materials used in the construction of the OCR compartment and states that § 25.853 as amended by Amendment 25-116 is the appropriate regulation. Amendment 25-116 is the latest amendment level for § 25.853.
Compliance with these special conditions does not relieve the applicant from the existing airplane certification-basis requirements. One particular area of concern is that installation of OCR compartments changes the compartment volume in the overhead area of the airplane. The applicant must comply with the pressurized compartment loads requirements of § 25.365(e), (f), and (g) for the OCR compartment, as well as for any other airplane compartments whose decompression characteristics are affected by the installation of an OCR compartment. Compliance with § 25.813 emergency exit access requirements must be demonstrated for all phases of flight during which occupants will be present.
As discussed above, these special conditions are applicable to the 787. Should Boeing apply at a later date for a change to the type certificate to include another model incorporating the same novel or unusual design features, these special conditions would apply to that model as well. Conclusion Back to Top
The intent of this special condition is to provide sufficient exit-route separation. Therefore, the exit-separation analysis described above should not be used to approve OCR-compartment outlets that have less physical separation (measured between the centroid of each exit opening) than the minimums prescribed below, unless compensating features are identified and submitted to the FAA for evaluation and approval. For an OCR compartment with one outlet located near the forward or aft end of the compartment (as measured by having the centroid of the exit opening within 20 percent of the forward or aft end of the total OCR-compartment length), the outlet separation from one outlet to the other should not be less than 50 percent of the total OCR-compartment length.
(a) At least one exit sign, located near each OCR compartment outlet, meeting the emergency lighting requirements of § 25.812(b)(1)(i). One allowable exception would be a sign with reduced background area of no less than 5.3 square inches (excluding the letters), provided that it is installed so that the material surrounding the exit sign is light in color (white, cream, light beige, for example). If the material surrounding the exit sign is not light in color, a sign with a minimum of a one-inch-wide background border around the letters would be acceptable. Another allowable exception is a sign with a symbol that the FAA has determined to be equivalent for use as an exit sign in an OCR compartment.
6. A means must be available for two-way voice communications between crewmembers on the flight deck and occupants of the OCR compartment. Two-way communications must also be available between occupants of the OCR compartment and each flight attendant station in the passenger cabin required per § 25.1423(g) to have a public-address-system microphone. In addition, the public-address system must include provisions to provide only the relevant information to the crewmembers in the OCR compartment (e.g., fire in flight, aircraft depressurization, preparation of the compartment occupants for landing, etc.).
8. A means, readily detectable by seated or standing occupants of the OCR compartment, must be in place to indicate when seat belts should be fastened. If the OCR compartment has no seats, at least one means must be provided to cover anticipated turbulence (e.g., sufficient handholds). Seatbelt-type restraints must be provided for berths and must be compatible for the sleeping position during cruise conditions. A placard on each berth must require that these restraints be fastened when occupied. If compliance with any of the other requirements of these special conditions is predicated on specific head position, a placard must identify that head position.
9. In lieu of the requirements specified in § 25.1439(a) pertaining to isolated compartments, and to provide a level of safety equivalent to that provided to occupants of an isolated galley, the following equipment must be provided in the OCR compartment:
(c) OCR compartments that are visually divided to the extent that evacuation could be affected must have exit signs directing occupants to the primary stairway outlet. The exit signs must be provided in each separate section of the OCR compartment, except for curtained bunks, and must meet requirements of § 25.812(b)(1)(i). An exit sign with reduced background area or a symbolic exit sign, as described in Special Condition 4(a), may be used to meet this requirement.
(4) In each section, exit signs meeting requirements of § 25.812(b)(1)(i), or shown to have an equivalent level of safety, must direct occupants to the primary stairway outlet. An exit sign with reduced background area or a symbolic exit sign, as described in Special Condition 4(a), may be used to meet this requirement.
15. If a waste-disposal receptacle is fitted in the OCR compartment, it must be equipped with an automatic fire extinguisher that meets the performance requirements of § 25.854(b).
16. Materials (including finishes or decorative surfaces applied to the materials) must comply with flammability requirements of § 25.853(a) as amended by Amendment 25-116. Seat cushions and mattresses must comply with the flammability requirements of § 25.853(c) as amended by Amendment 25-116 and the test requirements of part 25, appendix F, part II, or other equivalent methods.
18. Each stowage compartment in the OCR compartment, except for underseat compartments for occupant convenience, must be completely enclosed. All enclosed stowage compartments within the OCR compartment that are not limited to stowage of emergency equipment or airplane-supplied equipment (i.e., bedding) must meet the design criteria described in the table below. Enclosed stowage compartments greater than 200 ft
in interior volume are not addressed by this special condition. The in-flight accessibility of very large, enclosed, stowage compartments and the subsequent impact on the crewmembers' ability to effectively reach any part of the compartment with the contents of a hand-held fire-extinguishing system will require additional fire-protection considerations similar to those required for inaccessible compartments such as Class C cargo compartments.
1Compliant Materials of Construction: The material used in constructing each enclosed stowage compartment must at least be fire resistant and must meet the flammability standards established for interior components (i.e., 14 CFR part 25 Appendix F, Parts I, IV, and V) per the requirements of § 25.853. For compartments less than 25 ft.3in interior volume, the design must ensure the ability to contain a fire likely to occur within the compartment under normal use.
2Smoke or Fire Detectors: Enclosed stowage compartments equal to or exceeding 25 ft.3in interior volume must be provided with a smoke- or fire-detection system to ensure that a fire can be detected within a one-minute detection time. Flight tests must be conducted to show compliance with this requirement. Each system (or systems) must provide:
3Liner: If material used in constructing the stowage compartment can be shown to meet the flammability requirements of a liner for a Class B cargo compartment (i.e.,§ 25.855 at Amendment 25-116, and Appendix F, part I, paragraph (a)(2)(ii)), then no liner would be required for enclosed stowage compartments equal to or greater than 25 ft.3but less than 57 ft.3in interior volume. For all enclosed stowage compartments equal to or greater than 57 ft.3in interior volume but less than or equal to 200 ft.3, a liner must be provided that meets the requirements of § 25.855 for a Class B cargo compartment.
4Fire Location Detector: If an OFCR compartment has enclosed stowage compartments exceeding 25 ft.3interior volume that are located separately from the other stowage compartments (located, for example, away from one central location, such as the entry to the OFCR compartment or a common area within the OFCR compartment, where the other stowage compartments are), that OFCR compartment would require additional fire-protection features and/or devices to assist the firefighter in determining the location of a fire.