AD 2007-04-20

(a) This AD becomes effective April 3, 2007.

(b) None.

(c) This AD applies to EMBRAER Model ERJ 170-100 LR, -100 STD, -100 SE, -100 SU, -200 LR, -200 STD, and -200 SU airplanes, as identified in EMBRAER Service Bulletin 170-24-0026, dated December 22, 2005; and Model ERJ 190-100 STD, -100 LR, and -100 IGW airplanes, as identified in EMBRAER Service Bulletin 190-24-0003, dated December 22, 2005; certificated in any category.

(d) This AD results from reports that the ram air turbine (RAT) may not fully deploy due to galling between the piston rod and gland housing of the RAT deployment actuator. We are issuing this AD to prevent the RAT from failing to deploy, which could result in loss of control of the airplane during in-flight emergencies.

(e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.

(f) The term “service bulletin,” as used in this AD, means the Accomplishment Instructions of the service bulletins identified in paragraphs (f)(1) and (f)(2) of this AD. Where these service bulletins specify returning affected parts to Hamilton Sundstrand, this AD does not require that action.

(1) For Model ERJ 170-100 LR, -100 STD, -100 SE, -100 SU, -200 LR, -200 STD, and -200 SU airplanes: EMBRAER Service Bulletin 170-24-0026, dated December 22, 2005.

(2) For Model ERJ 190-100 STD, -100 LR, and -100 IGW airplanes: EMBRAER Service Bulletin 190-24-0003, dated December 22, 2005.

Note 1:

The EMBRAER service bulletins refer to Hamilton Sundstrand Service Bulletin ERPS37A-24-1, dated December 6, 2005, as an additional source of service information for inspecting for galling of the piston rod of the RAT deployment actuator and re-identifying the actuator. The Hamilton Sundstrand service bulletin is included as Appendix 1 of the EMBRAER service bulletins.

(g) Within 600 flight hours or 3 months after the effective date of this AD, whichever occurs first: Inspect to determine the part number and serial number of the RAT deployment actuator, in accordance with the applicable service bulletin. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number and serial number of the RAT deployment actuator can be conclusively determined from that review.

(1) If the part number of the actuator is not P/N 1703785: No further action is required by this AD, except as provided by paragraph (i) of this AD.

(2) If the part number of the actuator is P/N 1703785 and the serial number is S/N 0004, 0005, or 0101 through 0190 inclusive, or the part number or serial number cannot be conclusively determined: Within 600 flight hours or 3 months after the effective date of this AD, whichever occurs first, deploy the RAT, and do the actions specified in paragraph (g)(2)(i) or (g)(2)(ii) of this AD, as applicable, in accordance with the applicable service bulletin.

(i) If the RAT does not fully deploy or if it deploys with hesitation: Before further flight, replace the RAT deployment actuator with a modified and reidentified or new, improved actuator, having P/N 1703785A.

(ii) If the RAT fully deploys without hesitation: Before further flight, perform a general visual inspection for galling of the piston rod of the RAT deployment actuator. If no evidence of galling is detected, repeat the inspection for galling at intervals not to exceed 1,200 flight hours or 5 months, whichever occurs first, and before further flight after each deployment of the RAT. If any evidence of galling is found, before further flight, replace the RAT deployment actuator with a modified and reidentified or new, improved RAT deployment actuator having P/N 1703785A. Replacing the RAT deployment actuator terminates the repetitive inspections required by this paragraph for that RAT deployment actuator only.

Note 2:

For the purposes of this AD, a general visual inspection is: “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 from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight 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.”

(3) If the part number of the RAT deployment actuator is P/N 1703785, and the serial number is S/N 0191 through 0242 inclusive: Within 3,000 flight hours or 12 months after the effective date of this AD, whichever occurs first, reidentify the RAT deployment actuator with new P/N 1703785A in accordance with the applicable service bulletin.

(h) Within 3,000 flight hours or 12 months after the effective date of this AD, whichever occurs first: Replace all RAT deployment actuators having P/N 1703785 and having S/N 0004, 0005, or 0101 through 0190 inclusive, with modified and reidentified or new, improved actuators having P/N 1703785A, in accordance with the applicable service bulletin. Replacing all of the RAT deployment actuators terminates the repetitive inspections required by paragraph (g)(2)(ii) of this AD.

(i) As of the effective date of this AD, no person may install a RAT deployment actuator having P/N 1703785 on any airplane.

(j)(1) The Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19.

(2) Before using any AMOC approved in accordance with § 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office.

(k) Brazilian airworthiness directives 2006-05-06, effective June 14, 2006, and 2006-05-09, effective June 19, 2006, also address the subject of this AD.

(l) You must use EMBRAER Service Bulletin 170-24-0026, dated December 22, 2005; or EMBRAER Service Bulletin 190-24-0003, dated December 22, 2005; as applicable, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Empresa Brasileira de Aeronautica S.A. (EMBRAER), P.O. Box 343—CEP 12.225, Sao Jose dos Campos—SP, Brazil, for a copy of this service information. You may review copies at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.