AD 2018-07-13 Airworthiness Directives; Textron Aviation Inc. Airplanes

Makes named: textron aviation, cessna. Models named: 510, 680, 680A. Read the applicability below — it usually turns on serial or part numbers too.

(1) This AD applies to Textron Aviation Inc. (Textron) (type certificates previously held by Cessna Aircraft Company) Models 510, 680, and 680A airplanes, certificated in any category, with serial numbers listed in paragraphs (c)(1)(i) through (iii) of this AD and equipped with a brake assembly specified in paragraphs (c)(1)(i) through (iii) of this AD: (i) For Model 510 airplanes, serial numbers (S/N) -0001 through -0479: Brake assembly part number (P/N) 2-1706-1 that has a serial number listed in table 1 of UTC Aerospace Systems (UTC) Service Bulletin 2-1706-1-32-1, Revision 1, July 18, 2017; (ii) Model 680 airplanes, S/Ns -0001 through -0349 and -0501 through -0570: Brake assembly P/N 2-1675-1 that has a serial number listed in table 1 of UTC Service Bulletin 2-1675-32-2, Revision 1, July 18, 2017; and (iii) Model 680A airplanes, -0003 thru -0069 and -0071 thru -0089: Brake assembly P/N 2-1675-1 that has a serial number listed in table 1 of UTC Service Bulletin 2-1675-32-2, Revision 1, July 18, 2017. (2) The UTC service bulletins are included as attachments to Textron Service Letters SL510-32-08, SL680-32-15, and SL680A-32-05, all dated July 21, 2017. However, you may also obtain the UTC service bulletins directly from UTC using the contact information found in paragraph (k)(2) of this AD.

Comply with this AD within the compliance times specified, unless already done.

(1) For Model 510 airplanes: Within 75 landings after May 15, 2018 (the effective date of this AD) or within 90 days after May 15, 2018 (the effective date of this AD), whichever occurs first, inspect the brake pad wear indicator pins, P/N 2-1706-1, for correct length following the Accomplishment Instructions in UTC Service Bulletin 2-1706-1-32-1, Revision 1, July 18, 2017. (2) For Models 680 and 680A airplanes: Within 200 landings after May 15, 2018 (the effective date of this AD) or within 90 days after May 15, 2018 (the effective date of this AD), whichever occurs first, inspect the brake pad wear indicator pins, P/N 2-1675-1, for correct length following the Accomplishment Instructions in UTC Service Bulletin 2-1675-32-2, Revision 1, July 18, 2017. (3) The compliance times in this AD are presented in landings. If you do not keep a record of the total number of landings, then multiply the total number of hours time-in-service (TIS) after the effective date by 0.85 for Model 510 airplanes and multiply the total number of hours TIS after the effective date by 0.73 for Models 680 and 680A airplanes to estimate the number of landings. (4) UTC Service Bulletin 2-1706-1-32-1, Revision 1, July 18, 2017, and UTC Service Bulletin 2-1675-32-2, Revision 1, July 18, 2017, both contain a requirement to complete an attached form and return the form to UTC Aerospace Systems. This AD does not require completing the attached form and returning it to UTC Aerospace Systems.

This AD was prompted by information received from UTC that brake pad wear indicator pins were set incorrectly. We are issuing this AD to detect and address wear indicator pins that were set at an incorrect length. The unsafe condition, if not addressed, could result in brake pad wear beyond the acceptable limits without indication and consequent loss of braking ability, which could lead to a runway excursion.

None.