91-14-16 BRITISH AEROSPACE: Amendment 39-7057. Docket No. 91-NM-20-AD.
Applicability: Viscount Model 744 and 745D series airplanes (Post Modification D2267, Part B), and Model 810 series airplanes (Post Modification FG611, Part B), certificated in any category.
Compliance: Required as indicated, unless previously accomplished.
To prevent reduced structural integrity of the wings, accomplish the following:
A. Within 200 hours time-in-service or within 90 days after the effective date of this AD, whichever occurs first, inspect the upper break-joint for an incorrectly manufactured shear pin, Part No. 80203-3009, in accordance with British Aerospace Viscount Preliminary Technical Leaflet (PTL) No. 322, Issue 1 (for the Model 700 series airplanes), and PTL No. 191, Issue 1 (for the Model 810 series airplanes), both dated November 2, 1989. If damaged components or unserviceable short pins are found, prior to further flight, replace with serviceable parts in accordance with the appropriate PTL.
B. An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate.
NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Standardization Branch, ANM-113.
C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.
D. The inspection and replacement requirements shall be done in accordance with British Aerospace Viscount Preliminary Technical Leaflet (PTL) No. 322, Issue 1 (for Model 700 series airplanes), or PTL No. 191, Issue 1 (for Model 810 series airplanes), both dated November 2, 1989. 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 British Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041-0414. Copies may be inspected at the FAA, Transport Airplane Directorate, Renton, Washington; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C.
This amendment (39-7057, AD 91-14-16) becomes effective on August 9, 1991.