Airworthiness directives › 2001-03-10
AD 2001-03-10 Airworthiness Directives; Boeing Model 747-100, -200, -300, -400, and 747SR Series Airplanes
Models named: 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
All Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, and 747SR series airplanes; certificated in any category. 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 (c) 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 as indicated, unless accomplished previously. To prevent loss of a flap transmission, which could reduce lateral controllability of the airplane, accomplish the following: Replacement (a) Except as provided by paragraph (b) of this AD, within 18 months after the effective date of this AD, perform a one-time general visual inspection to determine whether H-11 steel bolts are installed as attach and support bolts at the trailing edge flap transmissions, in accordance with Boeing Alert Service Bulletin 747-27A2376, dated July 1, 1999. (1) If no H-11 steel bolt is found, no further action is required by this AD. (2) If any H-11 steel bolt is found, before further flight, replace with an Inconel bolt, in accordance with the alert service bulletin. Note 2: For the purposes of this AD, a general visual inspection is defined as: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or drop-light, and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.” Alternative Inspection for Certain Airplanes (b) For airplanes having line number (L/N) 872 and subsequent: Instead of doing paragraph (a) of this AD, it is acceptable to inspect airplane maintenance records to determine if a flap transmission or flap track repair or replacement has been done. This inspection of the maintenance records, if done, is required at the same 18-month compliance time as the inspection required by paragraph (a) of this AD. (1) If no flap transmission or flap track repair or replacement has been done: No further action is required by this AD. (2) If any flap transmission or flap track repair or replacement has been done, or if it cannot be determined from the inspection of the maintenance records if such repair or replacement has been done: Within 18 months after the effective date of this AD, do paragraph (a) of this AD. Alternative Methods of Compliance (c) 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, Seattle Aircraft Certification Office (ACO), FAA. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO. Note 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO. Special Flight Permits (d) 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. Incorporation by Reference (e) Except as provided by paragraph (b) of this AD, the actions shall be done in accordance with Boeing Alert Service Bulletin 747-27A2376, dated July 1, 1999. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Effective Date (f) This amendment becomes effective on March 28, 2001. Issued in Renton, Washington, on February 8, 2001. Vi L. Lipski, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 01-3699 Filed 2-20-01; 8:45 am] BILLING CODE 4910-13-P
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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