Federal Administration, DOT § 23.1459

listed in paragraphs (c)(1), (2), and (4) of sequent heat damage to the recorder this section must be recorded without from . interruption irrespective of the posi- (1) Except as provided in paragraph tion of the interphone-transmitter key (e)(2) of this section, the recorder con- switch. The design shall ensure that tainer must be located as far aft as sidetone for the flightcrew is produced practicable, but need not be outside of only when the interphone, public ad- the pressurized compartment, and may dress system, or transmitters are not be located where aft-mounted en- in use. gines may crush the container during (d) Each voice recorder must impact. be installed so that: (2) If two separate combination dig- (1)(i) It receives its electrical power ital data recorder and cockpit from the bus that provides the max- voice recorder units are installed in- imum reliability for operation of the stead of one cockpit voice recorder and cockpit voice recorder without jeopard- one digital flight data recorder, the izing service to essential or emergency combination unit that is installed to loads. comply with the cockpit voice recorder (ii) It remains powered for as long as requirements may be located near the possible without jeopardizing emer- cockpit. gency operation of the airplane. (f) If the cockpit voice recorder has a (2) There is an automatic means to bulk erasure device, the installation simultaneously stop the recorder and must be designed to minimize the prob- prevent each erasure feature from func- ability of inadvertent operation and ac- tioning, within 10 minutes after crash tuation of the device during crash im- impact. pact. (3) There is an aural or visual means (g) Each recorder container must— for preflight checking of the recorder (1) Be either bright orange or bright for proper operation. yellow; (4) Any single electrical failure exter- (2) Have reflective tape affixed to its nal to the recorder does not disable external surface to facilitate its loca- both the cockpit voice recorder and the tion under water; and flight data recorder. (3) Have an underwater locating de- (5) It has an independent power vice, when required by the operating source— rules of this chapter, on or adjacent to (i) That provides 10 ±1 minutes of the container, which is secured in such electrical power to operate both the manner that they are not likely to be cockpit voice recorder and cockpit- separated during crash impact. mounted area microphone; (ii) That is located as close as prac- § 23.1459 Flight data recorders. ticable to the cockpit voice recorder; and (a) Each required by (iii) To which the cockpit voice re- the operating rules of this chapter corder and cockpit-mounted area must be installed so that— microphone are switched automati- (1) It is supplied with airspeed, alti- cally in the event that all other power tude, and directional data obtained to the cockpit voice recorder is inter- from sources that meet the rupted either by normal shutdown or level system requirements and the by any other loss of power to the elec- functionality specified in § 23.2500; trical power bus. (2) The vertical sensor is (6) It is in a separate container from rigidly attached, and located longitu- the flight data recorder when both are dinally either within the approved cen- required. If used to comply with only ter of gravity limits of the airplane, or the cockpit voice recorder require- at a distance forward or aft of these ments, a combination unit may be in- limits that does not exceed 25 percent stalled. of the airplane’s mean aerodynamic (e) The recorder container must be chord; located and mounted to minimize the (3)(i) It receives its electrical power probability of rupture of the container from the bus that provides the max- as a result of crash impact and con- imum reliability for operation of the

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flight data recorder without jeopard- (2) Have reflective tape affixed to its izing service to essential or emergency external surface to facilitate its loca- loads; tion under water; and (ii) It remains powered for as long as (3) Have an underwater locating de- possible without jeopardizing emer- vice, when required by the operating gency operation of the airplane; rules of this chapter, on or adjacent to (4) There is an aural or visual means the container, which is secured in such for preflight checking of the recorder a manner that they are not likely to be for proper recording of data in the stor- separated during crash impact. age medium; (e) Any novel or unique design or (5) Except for recorders powered sole- operational characteristics of the air- ly by the engine-driven electrical gen- craft shall be evaluated to determine if erator system, there is an automatic any dedicated parameters must be re- means to simultaneously stop a re- corded on flight recorders in addition corder that has a data erasure feature to or in place of existing requirements. and prevent each erasure feature from functioning, within 10 minutes after § 23.1529 Instructions for continued crash impact; airworthiness. (6) Any single electrical failure exter- The applicant must prepare Instruc- nal to the recorder does not disable tions for Continued Airworthiness, in both the cockpit voice recorder and the accordance with appendix A of this flight data recorder; and part, that are acceptable to the Admin- (7) It is in a separate container from istrator. The instructions may be in- the cockpit voice recorder when both complete at type certification if a pro- are required. If used to comply with gram exists to ensure their completion only the flight data recorder require- prior to delivery of the first airplane or ments, a combination unit may be in- issuance of a standard certificate of stalled. If a combination unit is in- airworthiness, whichever occurs later. stalled as a cockpit voice recorder to comply with § 23.1457(e)(2), a combina- Subpart A—General tion unit must be used to comply with this flight data recorder requirement. § 23.2000 Applicability and definitions. (b) Each non-ejectable record con- (a) This part prescribes airworthiness tainer must be located and mounted so standards for the issuance of type cer- as to minimize the probability of con- tificates, and changes to those certifi- tainer rupture resulting from crash im- cates, for airplanes in the normal cat- pact and subsequent damage to the egory. record from fire. In meeting this re- (b) For the purposes of this part, the quirement, the record container must following definition applies: be located as far aft as practicable, but Continued safe flight and landing need not be aft of the pressurized com- means an airplane is capable of contin- partment, and may not be where aft- ued controlled flight and landing, pos- mounted engines may crush the con- sibly using emergency procedures, tainer upon impact. without requiring exceptional pilot (c) A correlation must be established skill or strength. Upon landing, some between the flight recorder readings of airplane damage may occur as a result airspeed, altitude, and heading and the of a failure condition. corresponding readings (taking into ac- count correction factors) of the first pi- § 23.2005 Certification of normal cat- lot’s instruments. The correlation egory airplanes. must cover the airspeed range over (a) Certification in the normal cat- which the airplane is to be operated, egory applies to airplanes with a pas- the range of altitude to which the air- senger-seating configuration of 19 or plane is limited, and 360 degrees of less and a maximum certificated take- heading. Correlation may be estab- off weight of 19,000 pounds or less. lished on the ground as appropriate. (b) Airplane certification levels are: (d) Each recorder container must— (1) Level 1—for airplanes with a max- (1) Be either bright orange or bright imum seating configuration of 0 to 1 yellow; passengers.

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