Airworthiness directives › 98-04-17
AD 98-04-17 Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN- 2A, and BN-2B Series Airplanes
Makes named: pilatus. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
BN-2, BN-2A, and BN-2B series airplanes (all serial numbers), certificated in any category, that have Pilatus Britten-Norman (Pilatus) Modification NB/M/1148 (70 amp DC Generation System) incorporated, and do not have Pilatus Modification NB/M/1571 (Introduction of Increased Rated Diode-70 amp DC Generation System) incorporated. Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
Compliance
Required within the next 50 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished. To prevent loss of electrical power to the navigation, communications and lighting systems, which could impair the pilot's ability to maintain control of the airplane, accomplish the following: (a) Remove the diodes (quantity 2, part number (P/N) 340502014, type 10B1 or 10D1) installed on the terminals of the STBD (RIGHT) GEN and PORT (LEFT) GEN switches (SW2 and SW3), and install new approved diodes (quantity 2, P/N NB-81-5873, type 60S6) in accordance with the Accomplishment Instructions section in Pilatus Britten-Norman Aircraft Manufacturers Service Bulletin (SB) BN-2/ SB.228, Issue 2, dated January 17, 1996. (b) Accomplishment of paragraph (a) of this AD is considered incorporation of Modification NB/M/1571. (c) Special flight permits may be issued in accordance with sections 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) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Small Airplane Directorate, 1201 Walnut, suite 900, Kansas City, Missouri, 64106. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Small Airplane Directorate. Alternative methods of compliance previously approved for AD 97-03-03 are considered approved for this AD. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Small Airplane Directorate. (e) The removal and installation required by this AD shall be done in accordance with Pilatus Britten-Norman Aircraft Manufacturers Service Bulletin (SB) BN-2/SB.228, Issue 2, dated January 17, 1996. (1) This incorporation by reference of Pilatus Britten-Norman Aircraft Manufacturers Service Bulletin (SB) BN-2/SB.228, Issue 2, dated January 17, 1996 was approved previously by the Director of the Federal Register as of March 23, 1997 (62 FR 4909, February 3, 1997). (2) Copies may be obtained from Pilatus Britten-Norman, Ltd., Bembridge, Isle of Wight, United Kingdom, PO35 5PR. Copies may be inspected at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment supersedes AD 97-03-03, Amendment 39-9909. (g) This Amendment (39-10329) becomes effective on March 23, 1998. Issued in Kansas City, Missouri, on February 6, 1998. Michael Gallagher, Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-3634 Filed 2-13-98; 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