Airworthiness Directive · Amendment 39-17825 · Flight controls
Airbus Airplanes
Superseded. A later AD replaced this one: AD 2017-24-07. Comply with the one in force.
This AD applies to all Airbus Model A318-111, -112, -121, and -122 airplanes; Model A319-111, -112, -113, -114, -115, -131, -132, and -133 airplanes; Model A320-111, -211, -212, -214, -231, -232, and -233 airplanes; and Model A321-111, -112, -131, -211, -212, -213, -231, and -232 airplanes; certificated in any category; all manufacturer serial numbers.
We are superseding Airworthiness Directive (AD) 2014-03-08 for all Airbus Model A318, A319, A320, and A321 series airplanes. AD 2014- 03-08 required an inspection to determine the part number of the interconnecting struts installed on the wings, identifying the part number and the serial number of the associated target and proximity sensor if applicable, and replacing or re-identifying the flap interconnecting strut if applicable. This new AD corrects a typographical error that affects the definition of a serviceable interconnecting strut. This AD was prompted by a report that an investigation showed that when a certain combination of a target/ proximity sensor serial number is installed on a flap interconnecting strut, a "target FAR" signal cannot be detected when it reaches the mechanical end stop of the interconnecting strut. We are issuing this AD to detect and correct a latent failure of the flap down drive disconnection due to an already-failed interconnecting strut sensor, which could result in asymmetric flap panel movement and consequent loss of control of the airplane.
This paragraph restates the requirements of AD 2014-03-08, Amendment 39-17745 (79 FR 9398, February 19, 2014), with a corrected typographical error in paragraph (g)(2)(i) of this AD that affects the definition of a serviceable interconnecting strut. Within 8,000 flight hours after March 26, 2014 (the effective date of AD 2014 03-08), inspect to determine the part number of the interconnecting struts installed on both the left-hand (LH) and right-hand (RH) wings of the airplane, in accordance with the Accomplishment Instructions of Airbus Service Bulletin A320-27-1206, Revision 01, dated October 10, 2011. A review of the airplane maintenance records is acceptable for determining the part number of the installed interconnecting struts, in lieu of the inspection, if the part number of the installed interconnecting struts, and the part number and the serial number of the associated target and proximity sensor, can be conclusively determined from that review.
(1) Airplanes on which Airbus Modification 27956 has been embodied in production, and on which no interconnecting strut has been replaced with a strut having a part number specified in figure 1 to paragraph (g) of this AD since the airplane's first flight: No further work is required by paragraph (g) of this AD.
(2) If, during the inspection required by the introductory text of paragraph (g) of this AD, any interconnecting strut is installed with a part number specified in figure 1 to paragraph (g) of this AD: Within 8,000 flight hours after March 26, 2014 (the effective date of AD 2014 03-08, Amendment 39-17745 (79 FR 9398, February 19, 2014)), determine the part number and the serial number of the associated target and proximity sensor.
(i) For airplanes having conditions specified in paragraphs (g)(2)(i)(A), (g)(2)(i)(B), (g)(2)(i)(C), and (g)(2)(i)(D) of this AD: Before further flight, replace the interconnecting strut with a serviceable unit, in accordance with the Accomplishment Instructions of Airbus Service Bulletin A320-27-1206, Revision 01, dated October 10, 2011. For the purposes of this AD, a serviceable interconnecting strut is a unit which has been determined to be in compliance with the requirements of this AD.
(A) A target part number (P/N) ABS0121-13 or P/N 8-536-01; and
(B) A target serial number lower than 1600, or a target serial number that is unreadable; and
(C) A proximity sensor having P/N ABS0121-31 or P/N 8-372-04; and
(D) A proximity sensor having a serial number between C59198 and C59435, or a serial number (S/N) C500000 or higher.
(ii) For a target having S/N 1600 or higher and target P/N ABS0121-13 or P/N 8-536-01: Within 8,000 flight hours after March 26, 2014 (the effective date of AD 2014 03-08, Amendment 39-17745 (79 FR 9398, February 19, 2014), re-identify the interconnecting strut, in accordance with the Accomplishment Instructions of Airbus Service Bulletin A320-27-1206, Revision 01, dated October 10, 2011.
| Interconnecting strut part Nos. |
|---|
| D5757030500000 |
| D5757030500100 |
| D5757030500200 |
| D5757030500600 |
| D5757030500800 |
| D5757030501000 |
| D5757030501200 |
| D5757032200000 |
This paragraph restates the requirements of AD 2014-03-08, Amendment 39-17745 (79 FR 9398, February 19, 2014). As of March 26, 2014 (the effective date of AD 2014 03-08), no person may install an interconnecting strut with a part number specified in figure 1 to paragraph (g) of this AD, on any airplane, except for parts identified in paragraph (g)(2)(ii) of this AD, provided that the actions in paragraph (g)(2)(ii) are done.
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.
Aircraft
