Airworthiness directives › 99-19-10
AD 99-19-10 Airworthiness Directives; Aerospatiale Model ATR-42 and ATR-72 Series Airplanes
Models named: ATR-42, ATR-72 series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model ATR-42 and ATR-72 series airplanes equipped with pneumatic deicing boots, certificated in any category.
Compliance
Required as indicated, unless accomplished previously. To ensure that flightcrews activate the wing and tail pneumatic deicing boots at the first signs of ice accumulation on the airplane, accomplish the following: (a) Within 10 days after the effective date of this AD: Revise the Limitations Section of the FAA-approved Airplane Flight Manual (AFM) to include the following requirements for activation of the ice protection systems. This may be accomplished by inserting a copy of this AD in the AFM. ``Except if the AFM otherwise specifies that deicing boots should not be used for certain phases of flight (e.g., take- off, final approach, and landing), compliance with the following is required. Wing and Tail Leading Edge Pneumatic Deicing Boot System, if installed, must be activated: --At the first sign of ice formation anywhere on the aircraft, or upon annunciation from an ice detector system, whichever occurs first; and --The system must either be continued to be operated in the automatic cycling mode, if available; or the system must be manually cycled as needed to minimize the ice accretions on the airframe. ``The wing and tail leading edge pneumatic deicing boot system may be deactivated only after completion of an entire deicing cycle after leaving icing conditions.'' (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate. The request shall be forwarded through an appropriate FAA Operations Inspector, who may add comments and then send it to the Manager, International Branch, ANM- 116 ACO. Note 1: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the International Branch, ANM-116 ACO. (c) Special flight permits may be issued in accordance with Secs. 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (d) This amendment becomes effective on December 27, 1999. Issued in Renton, Washington, on November 10, 1999. John J. Hickey, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 99-30136 Filed 11-19-99; 8:45 am] BILLING CODE 4910-13-U
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1