AD 91-15-10

91-15-10 SOCATA Groupe AEROSPATIALE: Amendment 39-7074. Docket No. 91-CE-56-AD.

Applicability: Models TB9 and TB10 airplanes (serial numbers 1 through 1217); and Models TB20 and TB21 airplanes (serial numbers 1 through 1030), certificated in any category.

Compliance: Required within the next 25 hours time-in-service after the effective date of this AD, unless already accomplished.

NOTE: The compliance time referenced in this AD takes precedence over that in the referenced service bulletin.

To prevent adverse airplane handling qualities and possible loss of control of the airplane, accomplish the following:

(a) Inspect the horizontal stabilizer balance weight attachment nuts for proper installation in accordance with the instructions in Parts 1) and 2) of SOCATA Groupe AEROSPATIALE Imperative Service Bulletin No. 57, dated January 1991.

(1) If the horizontal stabilizer balance weight attachment nuts are not loose and are properly installed, accomplish the requirements in Part 3) of SOCATA Groupe AEROSPATIALE Imperative Service Bulletin No. 57, dated January 1991, and return the airplane to service.

(2) If the horizontal stabilizer balance weight attachment nuts are loose or are improperly installed, prior to further flight, remove, inspect, modify and reinstall the horizontal stabilizer balance weight in accordance with the criteria and instructions in Part 4) of SOCATA Groupe AEROSPATIALE Imperative Service Bulletin No. 57, dated January 1991.

(b) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Brussels Aircraft Certification Office, FAA, Europe, Africa, and Middle East Office, c/o American Embassy, B-1000, Brussels, Belgium. The request should be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Brussels Aircraft Certification Office.

(c) The inspection and possible modification required by this AD shall be done in accordance with SOCATA Groupe AEROSPATIALE Imperative Service Bulletin No. 57, dated January 1991. This incorporation by reference was previously approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51, as of June 20, 1991, at 56 FR 2433 (May 30, 1991). Copies may be obtained from SOCATA Groupe AEROSPATIALE, Socata Product Support, Aeroport Tarbes-Ossun-Lourdes, B P 930, 65009 Tarbes Cedex, France; or the Product Support Manager, U.S.; AEROSPATIALE, 2701 Forum Drive, Grand Prairie, Texas. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 1100 L Street, NW, Room 8401, Washington, DC.

Airworthiness Directive 91-15-10 supersedes AD 91-12-19, Amendment 39-6988.

The amendment (39-7074, AD 91-15-10) becomes effective on August 10, 1991.