Aircraft Loudspeakers

[BERTRAND BRIL]

Wondering if theree exists some certified loudspeaker for internal cabin use, especially Public Address. What are docs for airworthiness of this speakers (EASA form one, 8130, others??).

[Denny of Oakland]

Sec. 25.819 Lower deck service compartments (including galleys.)

Section§ 25.819(e) require that a public address system be installed with speakers suitable for inflight audibility. Section 121.318 requires a public address system for airplanes engaged in passenger operations under Part 121. Under § 121.318(b)(4), this public address system must be audible at each flight attendant seat. Requiring the installation of the public address system as a condition for type certification under Part 25 is inappropriate since some of the certificated airplanes will not be operated in passenger operations under Part 121.

Denny of Oakland