Airworthiness Directive · Amendment 39-14266 · Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Airplanes
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Airplanes
This AD applies to all EMBRAER Model ERJ 170-100LR, -100 STD, -100SE, and -100 SU airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all EMBRAER Model ERJ 170 airplanes. This AD requires inspecting the hydraulic pressure tubes at the outlet of the engine-driven hydraulic pumps to determine the part and serial numbers; and replacing hydraulic pressure tubes having certain serial numbers with new hydraulic pressure tubes. This AD results from failure of a hydraulic system due to leakage of hydraulic fluid from a crack in the pipe coming from the pressure side of the engine-driven pump. We are issuing this AD to prevent cracking of the hydraulic pressure pipes, which could result in failure of hydraulic system 1 or 2 or both, and consequent reduced controllability of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 100 flight hours or 14 days after the effective date of this AD, whichever is first: Inspect the left and right hydraulic pressure tubes at the outlet of the engine-driven hydraulic pumps to determine the part and serial numbers, in accordance with Part I of the Accomplishment Instructions of EMBRAER Service Bulletin 170-29-0001, dated August 9, 2004.
(1) If neither hydraulic pressure tube has a serial number as identified in Part I of the service bulletin, then no further action is required by this paragraph.
(2) If only one hydraulic pressure tube has a serial number as identified in Part I of the service bulletin: Within 600 flight hours after the inspection, replace the affected hydraulic pressure tube with a new hydraulic pressure tube, in accordance with Part III or Part IV, as applicable, of the service bulletin.
(3) If both hydraulic pressure tubes have serial numbers as identified in Part I of the service bulletin: Before further flight, replace one of the affected hydraulic pressure tubes with a new hydraulic pressure tube, in accordance with Part III or Part IV, as applicable, of the service bulletin. Within 600 flight hours after the inspection, replace the other affected hydraulic pressure tube with a new hydraulic pressure tube, in accordance with Part III or Part IV, as applicable, of the service bulletin.
Note 1: EMBRAER Service Bulletin 170-29-0001 refers to Macchi-Hurel Dubois (MHD) Service Bulletin CF34-8E MHD 71-00-011, dated August 3, 2004, as an additional source of service information for inspecting the hydraulic pressure tubes to determine the part and serial numbers; and replacing hydraulic pressure tubes having certain serial numbers with new hydraulic pressure tube as applicable. Macchi-Hurel Dubois (MHD) Service Bulletin CF34-8E MHD 71-00-011 is included in EMBRAER Service Bulletin 170-29-0001.
Although the service bulletin referenced in this AD specifies to submit certain information to the manufacturer, this AD does not include that requirement.
As of the effective date of this AD, no person may install a hydraulic pressure pipe having any part and serial numbers identified in Part I of the Accomplishment Instructions of EMBRAER Service Bulletin 170-29-0001, dated August 9, 2004, on any airplane.
