Airworthiness Directive · Amendment 39-14952 · Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170-100 LR, -100 STD, -100 SE, -100 SU, -200 LR, -200 STD, and -200 SU Airplanes and Model ERJ 190 Airplanes
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170-100 LR, -100 STD, -100 SE, -100 SU, -200 LR, -200 STD, and -200 SU Airplanes and Model ERJ 190 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, 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.
The FAA is adopting a new airworthiness directive (AD) for certain EMBRAER Model ERJ 170-100 LR, -100 STD, -100 SE, -100 SU, -200 LR, -200 STD, and -200 SU airplanes and Model ERJ 190 airplanes. This AD requires inspecting to determine the part number and serial number of the deployment actuator of the ram air turbine (RAT) and related investigative and corrective actions if necessary. This AD results from reports that the 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.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
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.
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.
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.
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.
