# AD 93-01-25: Fuel Return Line Leakage - Type: Airworthiness directive - Status: Current - Products: Airbus A320-111, A320-211, A320-212, A320-214, A320-231, A320-232 and A320-233 - Effective: February 10, 1993 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-8479 - Docket: 92-NM-243-AD - Registered aircraft: 563 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/29437AFE5B51D5BD8625695E006EECA5.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/93-01-25 ## The airworthiness directive 93-01-25 AIRBUS INDUSTRIE: Amendment 39-8479. Docket 92-NM-243-AD. Applicability: Model A320 series airplanes, manufacturer's serial numbers 002 through 180, inclusive; 183 through 194, inclusive; 196 through 315, inclusive; 317 through 321, inclusive; 323 through 325, inclusive; and 328 through 334, inclusive; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent fuel leakage onto the engine and the potential for an engine fire, accomplish the following: (a) Within 500 hours time-in-service after the effective date of this AD, perform a torque check of the connection on the fuel return line at rib 9 in accordance with Airbus Industrie All Operator Telex (AOT) 28-04, Revision 1, dated September 9, 1992. (1) If the red witness marks are incorrectly aligned, prior to further flight, accomplish paragraphs (a)(1)(i) and (a)(1)(ii) of this AD in accordance with the AOT. (i) Tighten the connection totorque values between 478 and 522 inch-pounds. (ii) Remove the existing witness marks and remark with an indelible marker pen. (2) If the red witness marks are correctly aligned, this AD does not require retorquing or remarking. (b) Within 500 hours time-in-service after the effective date of this AD, perform a leak check of the sealant in pylon zone "A", in accordance with All Operator Telex (AOT) 28-04, Revision 1, dated September 9, 1992. (1) If any leak is found or if the water level drops while conducting the leak check, prior to further flight, replace the sealant in accordance with the AOT. (2) If no leak is found and if the water level does not drop while conducting the leak check, this AD does not require replacement of the sealant. (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch. (d) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (e) The checks, torquing, marking, and replacement shall be done in accordance with Airbus Industrie All Operator Telex 28-04, Revision 1, dated September 9, 1992. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Airbus Industrie, Airbus Support Division, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France. Copies may be inspected atthe FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on February 10, 1993. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A28NM](https://openairdocs.org/tcds/A28NM): Airbus SAS; names 7 of 50 models: A320-111, A320-211, A320-212, A320-214, A320-231, A320-232, A320-233 ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 563 (563 by airframe model, 0 by engine model) - Makers: Airbus 377, Airbus Industrie 184, Airbus S A S 2 Models with the most aircraft: - [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232): 189 aircraft (airframe model) - [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214): 160 aircraft (airframe model) - [Airbus Industrie A320-232](https://openairdocs.org/model/airbus-industrie-a320-232): 109 aircraft (airframe model) - [Airbus Industrie A320-212](https://openairdocs.org/model/airbus-industrie-a320-212): 39 aircraft (airframe model) - [Airbus Industrie A320-214](https://openairdocs.org/model/airbus-industrie-a320-214): 26 aircraft (airframe model) - [Airbus A320-233](https://openairdocs.org/model/airbus-a320-233): 21 aircraft (airframe model) - [Airbus Industrie A320-211](https://openairdocs.org/model/airbus-industrie-a320-211): 6 aircraft (airframe model) - [Airbus A320-211](https://openairdocs.org/model/airbus-a320-211): 3 aircraft (airframe model) - [Airbus Industrie A320-231](https://openairdocs.org/model/airbus-industrie-a320-231): 2 aircraft (airframe model) - [Airbus A320-212](https://openairdocs.org/model/airbus-a320-212): 2 aircraft (airframe model) - [Airbus S A S A320-214](https://openairdocs.org/model/airbus-s-a-s-a320-214): 2 aircraft (airframe model) - [Airbus A320-231](https://openairdocs.org/model/airbus-a320-231): 2 aircraft (airframe model) - [Airbus Industrie A320-233](https://openairdocs.org/model/airbus-industrie-a320-233): 1 aircraft (airframe model) - [Airbus Industrie A320-111](https://openairdocs.org/model/airbus-industrie-a320-111): 1 aircraft (airframe model) All 15 models: https://openairdocs.org/ad/93-01-25/models.md Every aircraft: https://openairdocs.org/ad/93-01-25/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.