87-01-05 EMPRESA BRASILEIRA DE AERONAUTICA S.A. (EMBRAER): Amendment 39-5490. Applies to Models EMB-110P1 and EMB-110P2 (Serial Numbers 110001 through 110467 inclusive) airplanes certificated in any category.
Compliance: Required as indicated after the effective date of this AD, unless already accomplished.
To preclude excessive vibration in the flight control surfaces and possible loss of control of the airplane, accomplish the following:
(a) Within the next 100 hours time-in-service (TIS) after the effective date of this AD, visually inspect for jamming or seizure of all bearings installed in the aileron trim tab bellcrank, actuator eyelets and the terminals of control rods for the elevator, rudder and aileron trim tab control systems in accordance with Section 2, "ACCOMPLISHMENT INSTRUCTIONS" of EMBRAER Service Bulletin (S/B) 110-27-036, Change 02, dated December 3, 1981. If a jammed or seized bearing is found, prior to further flight;
(1) Remove and replace the defective part with a serviceable part of the same Part Number (P/N), or
(2) Modify, inspect, replace and/or repair as required,
(i) the aileron and rudder trim tab control systems in accordance with paragraph (c)(1) of this AD, and
(ii) the elevator trim tab control system in accordance with paragraph (c)(2) of this AD.
(b) When the modifications and actions specified in paragraph (a)(2) of this AD have been accomplished, the actions required by paragraph (c) of this AD are no longer required.
(c) Within the next 250 hours TIS after the effective date of this AD,
(1) Modify the aileron and rudder trim tab control systems in accordance with Section 2. "ACCOMPLISHMENT INSTRUCTIONS" of EMBRAER S/B 110-027-0060, Change 02, dated July 3, 1986.
(2) Modify, inspect, replace and/or repair the elevator trim tab control system and elevator,
(i) on airplanes without dual control rods as described in Section 2. "ACCOMPLISHMENT INSTRUCTIONS",paragraphs 2.1 through 2.1.18 of EMBRAER S/B 110-027-0068, dated April 9, 1986, or
(ii) on airplanes with dual control rods installed as described in Section 2, "ACCOMPLISHMENT INSTRUCTIONS", paragraphs 2.2 through 2.2.10 of EMBRAER S/B 110-027-0068, dated April 9, 1986.
(d) Aircraft may be flown in accordance with FAR 21.197 to a location where this AD can be accomplished.
(e) An equivalent method of compliance with this AD may be used if approved by the Manager, Atlanta Aircraft Certification Office, ACE-115A, FAA, Central Region, 1075 Inner Loop Road, College Park, Georgia 30337; Telephone (404) 763-7428.
All persons affected by this directive may obtain copies of the documents referred to herein upon request to Empresa Brasileira de Aeronautica S.A. (EMBRAER), Post Office Box 343-CEP 12.200 Sao Jose dos Campos, Sao Paulo, Brazil; or FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.
This amendment becomes effective on January 22, 1987.