Airworthiness Directive · Amendment 39-16417 · Fuselage
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Airplanes; and Model ERJ 190-100 LR, -100 IGW, -100 STD, -200 STD, -200 LR, and -200 IGW Airplanes
This AD applies to EMBRAER Model ERJ 170-100 LR, -100 STD, -100 SE, -100 SU, -200 LR, -200 STD, and -200 SU airplanes, serial numbers 17000002, 17000004 through 17000013 inclusive, and 17000015 through 17000208 inclusive; and Model ERJ 190-100 LR, -100 IGW, -100 STD, -200 STD, -200 LR, and -200 IGW airplanes, serial numbers 19000002, 19000004, and 19000006 through 19000152 inclusive; certificated in any category.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, within 600 flight hours after the effective date of this AD: Perform a detailed visual inspection for cracks in the RAT machined support, in accordance with the Accomplishment Instructions of EMBRAER Service Bulletin 170-53-0057, dated February 21, 2008; or EMBRAER Service Bulletin 190-53-0027, dated February 18, 2008; as applicable.
(1) If no crack is found, do the actions in either paragraph (f)(1)(i) or (f)(1)(ii) of this AD.
(i) At the earlier of the times specified in paragraphs (f)(1)(i)(A) and (f)(1)(i)(B) of this AD, install reinforcements in the RAT machined support or replace the RAT machined support with a new support having part number 170-18676-405, in accordance with the Accomplishment Instructions of EMBRAER Service Bulletin 170-53-0057, dated February 21, 2008; or EMBRAER Service Bulletin 190-53-0027, dated February 18, 2008; as applicable.
(A) Within 5,000 flight hours after accomplishing the inspection required by paragraph (f) of this AD.
(B) Before further flight after the next two RAT deployments—which can be a flight deployment or a ground deployment as part of a maintenance task—after accomplishing the inspection required by paragraph (f) of this AD.
(ii) Do the actions specified in paragraph (f)(1)(ii)(A) and (f)(1)(ii)(B) of this AD.
(A) Do the inspection specified in paragraph (f) of this AD before further flight after each RAT deployment—which can be a flight deployment or a ground deployment as part of a maintenance task—until the installation specified in paragraph (f)(1)(ii)(B) of this AD is accomplished or the replacement specified in paragraph (f)(2) of this AD is accomplished.
(B) Within 5,000 flight hours after accomplishing the inspection required by paragraph (f) of this AD, install reinforcements in the RAT machined support or replace the RAT machined support with a new support having part number 170-18676-405, in accordance with the Accomplishment Instructions of EMBRAER Service Bulletin 170-53-0057, dated February 21, 2008; or EMBRAER Service Bulletin 190-53-0027, dated February 18, 2008; as applicable.
(2) If any cracking is found, before further flight replace the RAT machined support with a new support having part number 170-18676-405, in accordance with the Accomplishment Instructions of EMBRAER Service Bulletin 170-53-0057, dated February 21, 2008; or EMBRAER Service Bulletin 190-53-0027, dated February 18, 2008; as applicable.
Note 1: Guidance on retracting the RAT without damaging the RAT machined support may be found in Task Number 24-23-00-840-801-A/200—Ram-Air-Turbine (RAT)—Retraction, of the EMBRAER 170/190 Airplane Maintenance Manual.
Note 2: This AD differs from the MCAI and/or service information as follows:
Although the MCAI or service information allows further flight after cracks are found during compliance with the required action, paragraph (f)(2) of this AD requires that you replace any cracked lug of the RAT machined support with a new support before further flight.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
