153 compartment door/drawer for operation of the compartment and manufacturing is acceptable.
These compartments are considered to be completely enclosed. (Amendment 25-32)
(2) Paragraph (a). Standard design criteria for underseat baggage restraint. (These criteria can be used for test or analysis purposes.) (Amendment 25-32)
(i) Forward restraint design criteria. (Amendment 25-32) (A) Load factor - 9g forward. (Amendment 25-32) (B) Basic baggage weight - 20 lbs per individual seat. (Amendment 25-32) (C) Bag dimension - 3 X 12 X 17-inches (assumed rigid). (Amendment 25-32) NOTE: These dimensions represent what is considered the most severe case and are not to be construed as the maximum baggage size which should be considered. The restraint device should be capable of restraining baggage of a size that can be stowed under the seat in the available space, but the weight need not be more than 20 lbs. (Amendment 25-32) (D) The bag surface upon which it rests should be assumed smooth so as to minimize any friction restraint. (Amendment 25-32) (E) The load (20 lbs X 9 g = 180 lbs) should be assumed applied through the bag with the seat mounted in its normal position. The 17 X 3-inch bag dimension should impinge on the restraint device unless the underseat dimensions are such that the test bag would protrude beyond the seat. In that case the 3 X 12-inch dimension should be used. (Amendment 25-32) (F) The critical load conditions for the underseat baggage restraints should be identified and demonstrated. (Amendment 25-32) (G) The bottom of the restraint system should be no more than 2 1/2-inches above the floor level of the airplane. The top of the system should be no less than 3-inches above the floor level of the airplane. (Amendment 25-32)
(ii) Side restraining design criteria. (Amendment 25-32) (A) The underseat baggage side restraint system should be capable of restraining a 20-pound rigid article per seat with the dimensions of 3 X 12 X 17-inches at 1.5g of side loading. (20 lbs X 1.5 g = 30 lbs per article.) (Amendment 25-32) (B) The side restraint system should be capable of restraining the article at
1.5g sidewards with the 17-inch dimension oriented fore and aft in the airplane. (Amendment 25-
32)
154 (C) If the restraint system allows application of a footload, the system should be capable of withstanding a 300 pound standing load, applied in the most critical mode, without degrading either the basic forward load carrying capability or the side load carrying capabilities noted above or resulting in deformation causing the system to pose a tripping hazard.
(Amendment 25-32) (D) The system should be capable of withstanding the most critical loading condition due to asymmetrical loading of the system. (Amendment 25-32) (E) The bottom of the restraint system should be no more than 2 1/2-inches above the floor level of the airplane. The top of the system should be no less than 3-inches above the floor level of the airplane. The restraint system should extend a minimum of 8.75- inches aft from the aft face of the forward restraint portion of the system. (Amendment 25-32) (F) The side restraint system should not present a tripping hazard either for ingress to the seat or egress to the aisle or to the evacuation route. (Amendment 25-32) (G) The restraint system should not protrude into the aisle or evacuation route farther than the seat armrest on the aisle side. (Amendment 25-32)
(3) Paragraph (a). If overhead stowage compartments are intended for carriage of baggage, other than articles of loose clothing, they must be provided with approved restraining devices or doors (§ 121.589 (b)). (Amendment 25-32)
(4) Paragraph (a). The wording “a passenger seating configuration, excluding pilot seats, of 10 seats or more,” which was promulgated with the intent of being consistent with Amendment 23-10 to part 23, does not directly address seats intended for use by observers or flight attendants. Seats approved for use by observers or flight attendants are not included in the passenger seating configuration. Seats that have dual approval for occupancy by either crew/observers or passengers will be included in the passenger seating configuration.
(Amendment 25-32)
(5) Paragraph (a). Compartments placarded "No Stowage" need not have a weight limit placard. Compartments placarded "Emergency Equipment Only" need not have a weight limit placard provided the compartment is filled with designated emergency equipment that does not exceed the compartment's limit. (Refer to paragraphs 801b(1)(ii), 1041b(5) and 1101b(2).)
(Amendment 25-0)
(6) Paragraph (b). Baggage can be free if it can be shown that the forward barrier and cargo liner are able to restrain impact loads and the compartment is small enough to prevent significant shifts in center of gravity (c.g.). A 9g barrier net or other structure is required in all cargo versions if the cargo is not restrained to § 25.561 loads. In this case the cargo is restrained to flight and ground loads to prevent c.g. movement. If no 9g barrier net is used, the cargo is restrained to § 25.561 loads in an approved installation such as containers or pallets. (Refer to paragraph 1041b.(8).) (Amendment 25-0)
104. AMENDMENT 25-51, Effective March 6, 1980.
a. Regulation.
(a) Each compartment for the stowage of cargo, baggage, carry-on articles, and equipment (such as life rafts), and any other stowage compartment must be designed for its placarded maximum weight of contents and for the critical load distribution at the appropriate maximum load factors corresponding to the specified flight and ground load conditions, and to the emergency landing conditions of § 25.561(b), except that the forces specified in the emergency landing conditions need not be applied to compartments located below, or forward, of all occupants in the airplane.
If the airplane has a passenger seating configuration, excluding pilots seats, of 10 seats or more, each stowage compartment in the passenger cabin, except for underseat and overhead compartments for passenger convenience, must be completely enclosed.
(b) There must be a means to prevent the contents in the compartments from becoming a hazard by shifting, under the loads specified in paragraph (a) of this section. [For stowage compartments in the passenger and crew cabin, if the means used is a latched door, the design must take into consideration the wear and deterioration expected in service.]
(c) If cargo compartment lamps are installed, each lamp must be installed so as to prevent contact between lamp bulb and cargo.
b. Guidance.
(1) Paragraph (a). The intent for requiring completely enclosed stowage compartments is to provide more protection to occupants than that provided by restraint devices such as tiedown straps or webbing (with or without a curtain). A gap of 0.125-inch or less around the compartment door/drawer for operation of the compartment and manufacturing is acceptable.
These compartments are considered to be completely enclosed. (Amendment 25-32)
(2) Paragraph (a). Standard design criteria for underseat baggage restraint. (These criteria can be used for test or analysis purposes.) (Amendment 25-32)
(i) Forward restraint design criteria. (Amendment 25-32) (A) Load factor - 9g forward. (Amendment 25-32) (B) Basic baggage weight - 20 lbs per individual seat. (Amendment 25-32) (C) Bag dimension - 3 X 12 X 17-inches (assumed rigid). (Amendment 25-32)
156 NOTE: These dimensions represent what is considered the most severe case and are not to be construed as the maximum baggage size which should be considered. The restraint device should be capable of restraining baggage of a size that can be stowed under the seat in the available space, but the weight need not be more than 20 lbs. (Amendment 25-32) (D) The bag surface upon which it rests should be assumed smooth so as to minimize any friction restraint. (Amendment 25-32) (E) The load (20 lbs X 9 g = 180 lbs) should be assumed applied through the bag with the seat mounted in its normal position. The 17 X 3-inch bag dimension should impinge on the restraint device unless the underseat dimensions are such that the test bag would protrude beyond the seat. In that case the 3 X 12-inch dimension should be used. (Amendment 25-32) (F) The critical load conditions for the underseat baggage restraints should be identified and demonstrated. (Amendment 25-32) (G) The bottom of the restraint system should be no more than 2 1/2-inches above the floor level of the airplane. The top of the system should be no less than 3-inches above the floor level of the airplane. (Amendment 25-32)
(ii) Side restraining design criteria. (Amendment 25-32) (A) The underseat baggage side restraint system should be capable of restraining a 20-pound rigid article per seat with the dimensions of 3 X 12 X 17-inches at 1.5g of side loading. (20 lbs X 1.5 g = 30 lbs per article.) (Amendment 25-32) (B) The side restraint system should be capable of restraining the article at
1.5g sidewards with the 17-inch dimension oriented fore and aft in the airplane. (Amendment 25-
32) (C) If the restraint system allows application of a footload, the system should be capable of withstanding a 300 pound standing load, applied in the most critical mode, without degrading either the basic forward load carrying capability or the side load carrying capabilities noted above or resulting in deformation causing the system to pose a tripping hazard.
(Amendment 25-32) (D) The system should be capable of withstanding the most critical loading condition due to asymmetrical loading of the system. (Amendment 25-32) (E) The bottom of the restraint system should be no more than 2 1/2-inches above the floor level of the airplane. The top of the system should be no less than 3-inches above the floor level of the airplane. The restraint system should extend a minimum of 8.75- inches aft from the aft face of the forward restraint portion of the system. (Amendment 25-32)
157 (F) The side restraint system should not present a tripping hazard either for ingress to the seat or egress to the aisle or to the evacuation route. (Amendment 25-32) (G) The restraint system should not protrude into the aisle or evacuation route farther than the seat armrest on the aisle side. (Amendment 25-32)
(3) Paragraph (a). If overhead stowage compartments are intended for carriage of baggage, other than articles of loose clothing, they must be provided with approved restraining devices or doors (§ 121.589 (b)). (Amendment 25-32)
(4) Paragraph (a). The wording “a passenger seating configuration, excluding pilot seats, of 10 seats or more,” which was promulgated with the intent of being consistent with Amendment 23-10 to part 23, does not directly address seats intended for use by observers or flight attendants. Seats approved for use by observers or flight attendants are not included in the passenger seating configuration. Seats that have dual approval for occupancy by either crew/observers or passengers will be included in the passenger seating configuration.
(Amendment 25-32)
(5) Paragraph (a). Compartments placarded "No Stowage" need not have a weight limit placard. Compartments placarded "Emergency Equipment Only" need not have a weight limit placard provided the compartment is filled with designated emergency equipment that does not exceed the compartment's limit. (Refer to paragraphs 801b(1)(ii), 1041b(5) and 1101b(2).)
(Amendment 25-0)
(6) Paragraph (b). Baggage can be free if it can be shown that the forward barrier and cargo liner are able to restrain impact loads and the compartment is small enough to prevent significant shifts in center of gravity (c.g.). A 9g barrier net or other structure is required in all cargo versions if the cargo is not restrained to § 25.561 loads. In this case the cargo is restrained to flight and ground loads to prevent c.g. movement. If no 9g barrier net is used, the cargo is restrained to § 25.561 loads in an approved installation such as containers or pallets. (Refer to paragraph 1041b.(8).) (Amendment 25-0)
(7) Paragraph (b). The intent of the last sentence of paragraph (b) is to prevent inadvertent opening of the latched doors of stowage compartments by specifically requiring that service wear and deterioration be considered in the design. This is not the same as the § 25.789 requirement that is directed to retention of items of mass subjected to maximum load factors.
The installation of acceptable dual latching devices, each of which can withstand the applicable loads, has been found to be one means to show compliance with this rule. Refer to AC 25.785- 1A, “Flight Attendant Seat and Torso Restraint System Installations,” dated 1/6/94, for additional information. (Amendment 25-51) 105 - 120. [RESERVED]
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159 SECTION 25.789 RETENTION OF ITEMS OF MASS
121. Section 25.789 Did Not Exist Prior to Amendment 25-32.
122. AMENDMENT 25-32, Effective May 1, 1972.
a. Regulation.
Means must be provided to prevent each item of mass (that is part of the airplane type design) in a passenger or crew compartment from becoming a hazard by shifting under the appropriate maximum load factors corresponding to the specified flight and ground load conditions, and to the emergency landing conditions of § 25.561(b).
b. Guidance. The FAA issued policy memorandum ANM-115-05-001, dated October 28, 2004, and titled “Policy Statement on the Installation of “No Stowage” Placards on Surfaces Not Designed or Intended To Be Used for Stowage”. Appendix 14 of this AC contains the complete policy memorandum. (Amendment 25-32)
123. AMENDMENT 25-46, Effective December 1, 1978.
a. Regulation.
[(a)] Means must be provided to prevent each item of mass (that is part of the airplane type design) in a passenger or crew compartment [or galley] from becoming a hazard by shifting under the appropriate maximum load factors corresponding to the specified flight and ground load conditions, and to the emergency landing conditions of § 25.561(b).
[(b) Each interphone restraint system must be designed so that when subjected to the load factors specified in § 25.561(b)(3), the interphone will remain in its stowed position.]
b. Guidance.
(1) Note: Refer to paragraph 1041.b. for additional guidance material. (Amendment 25-
46)
(2) Paragraph (a). Refer to AC 25.785-1A, “Flight Attendant Seat and Torso Restraint System Installations,” dated 1/6/94, for additional information. (Amendment 25-46)
(3) The FAA issued policy memorandum ANM-115-05-001, dated October 28, 2004, and titled “Policy Statement on the Installation of “No Stowage” Placards on Surfaces Not Designed or Intended To Be Used for Stowage”. Appendix 14 of this AC contains the complete policy memorandum. (Amendment 25-32)
160 124 -140. [RESERVED]
161 SECTION 25.791 PASSENGER INFORMATION SIGNS
141. Section 25.791 Did Not Exist Prior to Amendment 25-32.
142. AMENDMENT 25-32, Effective May 1, 1972.
a. Regulation.
When passenger information signs are installed to comply with the operating rules of this chapter, at least one sign (using either letters or symbols) notifying when smoking is prohibited and one sign (using either letters or symbols) notifying when safety belts should be fastened must, when illuminated, be legible to each person seated in the passenger cabin under all probable conditions of cabin illumination.
Signs which notify when safety belts should be fastened and when smoking is prohibited must be so constructed that the crew can turn them on and off.
b. Guidance.
(1) Each cabin occupant, including flight attendants but not pilot compartment occupants, should be able to Refer to a passenger information sign when seated in a seat occupiable for taxi, takeoff, and landing and for in-flight only seats. This should be accomplished for any seat position such as upright, reclined, swiveled, or tracked. The sign should be readable by a person with 20/20 vision. To read the sign, the head may be moved about to normal positions, but not rotated backwards (tilted). This evaluation should be conducted with 5th percentile female to 95th percentile male occupants. (Amendment 25-32)
(2) The words "FASTEN SEAT BELT" and "NO SMOKING" are acceptable. In remote areas, such as the lavatory or lower lobe galley, a sign with the words "RETURN TO SEAT" is acceptable. This sign should be operated by the same switch as the "FASTEN SEAT BELT" sign switch. (Amendment 25-32)
(3) In compartments where smoking is not allowed, it may be necessary to hardwire ON any lighted NO SMOKING signs to avoid confusing occupants. Note: this may affect an operator’s ability to comply with § 121.317(a). The FAA issued a policy memorandum ANM- 03-115-05, dated July 7, 2003, titled “Policy Statement and Equivalent Safety Finding on No Smoking Placards and Signs” that addresses this subject. Refer to related guidance in § 25.853, which includes portions of the policy memorandum ANM-03-115-05. (Amendment 25-32)
(4) Refer to Appendix 2 for acceptable symbols for these signs. (Amendment 25-32)
143. AMENDMENT 25-72, Effective August 20, 1990.
a. Regulation.
Passenger information signs [and placards.] [(a) If smoking is to be prohibited, there must be at least one placard so stating that is legible to each person seated in the cabin. If smoking is to be allowed, and if the crew compartment is separated from the passenger compartment, there must be at least one sign notifying when smoking is prohibited. Signs which notify when smoking is prohibited must be operable by a member of the flightcrew and, when illuminated, must be legible under all probable conditions of cabin illumination to each person seated in the cabin.
(b) Signs that notify when seat belts should be fastened and that are installed to comply with the operating rules of this chapter must be operable by a member of the flightcrew and, when illuminated, must be legible under all probable conditions of cabin illumination to each person seated in the cabin.
(c) A placard must be located on or adjacent to the door of each receptacle used for the disposal of flammable waste materials to indicate that use of the receptacle for disposal of cigarettes, etc., is prohibited.
(d) Lavatories must have "No Smoking" or "No Smoking in Lavatory" placards conspicuously located on or adjacent to each side of the entry door.
(e) Symbols that clearly express the intent of the sign or placard may be used in lieu of letters.]
b. Guidance.
(1) Paragraph (a). In compartments where smoking is not allowed, it may be necessary to hardwire ON any lighted NO SMOKING signs to avoid confusing occupants. Note: this may affect an operator’s ability to comply with § 121.317(a). The FAA issued a policy memorandum ANM-03-115-05, dated July 7, 2003, titled “Policy Statement and Equivalent Safety Finding on No Smoking Placards and Signs” that addresses this subject. Refer to related guidance in § 25.853, which includes portions of the policy memorandum ANM-03-115-05. (Amendment 25-32)
(2) Paragraph (a) and (b). Each cabin occupant, including flight attendants but not pilot compartment occupants, should be able to Refer to a passenger information sign when seated in a seat occupiable for taxi, takeoff, and landing and for in-flight only seats. This should be accomplished for any seat position such as upright, reclined, swiveled, or tracked. The sign should be readable by a person with 20/20 vision. To read the sign, the head may be moved about to normal positions, but not rotated backwards (tilted). This evaluation should be conducted with 5th percentile female to 95th percentile male occupants. (Amendment 25-32)
(3) Paragraph (a) and (b). The words "FASTEN SEAT BELT" and "NO SMOKING" are acceptable. In remote areas, such as the lavatory or lower lobe galley, a sign with the words "RETURN TO SEAT" is acceptable. This sign should be operated by the same switch as the "FASTEN SEAT BELT" sign switch. (Amendment 25-32)
(4) Paragraph (e). Refer to Appendix 2 for acceptable symbols for these signs.
(Amendment 25-32) 144 -160. [RESERVED]