Airworthiness Directive · Amendment 39-15716 · Ice and rain protection
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 Airplanes, and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP Airplanes
This AD applies to EMBRAER Model EMB-135BJ, -135ER, -135KE, -135KL, and -135LR airplanes and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes; certificated in any category; having serial numbers 145002 through 145362, 145364 through 145590, and 145592 through 14500987.
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 2,500 flight hours or 24 months after the effective date of this AD, whichever occurs first, do the following actions in accordance with the Accomplishment Instructions of Embraer Service Bulletin 145-30-0052, Revision 01, dated January 23, 2008; or 145LEG-30-0019, Revision 01, dated January 25, 2008; as applicable. Do all applicable replacements and re-identification before further flight.
(1) Perform a detailed inspection of the Pitot 1 (K0053), Pitot 2 (K0054), TAT 1 (K0064), and TAT 2 (K0494) current sensor relays for possible damage caused by overheating in their contacts, enclosure, and finishing material.
(i) If no damage is found on a current sensor relay, that relay may be reinstalled.
(ii) If any damage is found on a current sensor relay, replace the relay with a new relay having the same part number (P/N), CS500-060-D4A.
(2) Perform a detailed inspection on the Pitot 1 (XK0053), Pitot 2 (XK0054), TAT 1 (XK0064), and TAT 2 (XK0494) relay sockets for possible damage caused by overheating in their contacts, enclosure, and finishing material.
(i) If no damage is found on a socket, replace electrical contacts A1 and C1 of the socket with new contacts having P/N M39029/92-536; re-identify the socket from P/N S500-9140 to S500-9140-A; and re-identify the socket electrical code from XK0053, XK0054, XK0064, and XK0494, to XK1243, XK1242, XK1245, and XK1244, respectively.
(ii) If any damage is found on a socket, replace the socket with a new socket having P/N S500-9140-A or S500-9216.
(3) Actions accomplished in accordance with Embraer Service Bulletin 145-30-0052, dated August 2, 2007; or 145LEG-30-0019, dated August 28, 2007; as applicable; are acceptable for compliance with this AD, provided that a detailed inspection is accomplished in place of the general visual inspection specified in the service bulletins.
Note 1: For the purpose of this AD, a detailed inspection (DET) is: “An intensive examination of a specific item, installation or assembly to detect damage, failure or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate access procedures may be required.”
Note 2: This AD differs from the MCAI and/or service information as follows: No differences.
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.
