25.855—Cargo or baggage compartments.
For each cargo or baggage compartment, the following apply:
(b)
Class B through Class E cargo or baggage compartments, as defined in § 25.857, must have a liner, and the liner must be separate from (but may be attached to) the airplane structure.
(c)
Ceiling and sidewall liner panels of Class C compartments must meet the test requirements of part III of appendix F of this part or other approved equivalent methods.
(d)
All other materials used in the construction of the cargo or baggage compartment must meet the applicable test criteria prescribed in part I of appendix F of this part or other approved equivalent methods.
(e)
No compartment may contain any controls, lines, equipment, or accessories whose damage or failure would affect safe operation, unless those items are protected so that—
(f)
There must be means to prevent cargo or baggage from interfering with the functioning of the fire protective features of the compartment.
(g)
Sources of heat within the compartment must be shielded and insulated to prevent igniting the cargo or baggage.
(2)
The entries of hazardous quantities of smoke or extinguishing agent into compartments occupied by the crew or passengers, and
(i)
During the above tests, it must be shown that no inadvertent operation of smoke or fire detectors in any compartment would occur as a result of fire contained in any other compartment, either during or after extinguishment, unless the extinguishing system floods each such compartment simultaneously.
(j)
Cargo or baggage compartment electrical wiring interconnection system components must meet the requirements of § 25.1721.