AD 93-09-02

93-09-02 AIRBUS INDUSTRIE: Amendment 39-8569. Docket 92-NM-226-AD.

Applicability: Model A300, A310, and A300-600 series airplanes, as listed in Airbus Industrie All Operator Telex (AOT) 29-07, dated August 28, 1992; airplanes, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent jamming of the hydraulic fire shut off valve (FSOV) actuator, which could result in the inability to isolate hydraulic fluid from an engine fire, accomplish the following:

(a) For airplanes having any hydraulic FSOV that has not ever been functionally tested in accordance with Maintenance Planning Document (MPD) Task Number 29-11-33-0503-1 (for Model A300 series airplanes) or MPD Task Number 29-11-33-01-1 (for Model A310 and A300-600 series airplanes): Within 450 hours time-in-service after the effective date of this AD, perform a one-time operational test to detect potential bearing failure of the electric motor that drives thehydraulic FSOV actuator, and to detect FSOV malfunction, in accordance with Airbus Industrie All Operator Telex (AOT) 29-07, dated August 28, 1992. (1) If any FSOV fails the operational test, prior to further flight, replace that FSOV in accordance with the AOT. (2) If a FSOV passes the operational test, no further action is necessary for that FSOV.

(b) For airplanes having any hydraulic FSOV that has been functionally tested only once in accordance with MPD Task Number 29-11-33-0503-1 (for Model A300 series airplanes) or MPD Task Number 29-11-33-01-01 (for Model A310 and A300-600 series airplanes): Within 900 hours time-in-service after the effective date of this AD, perform a one-time operational test to detect potential bearing failure of the electric motor that drives the hydraulic FSOV actuator, and to detect FSOV malfunction, in accordance with Airbus Industrie All Operator Telex (AOT) 29-07, dated August 28, 1992. (1) If any FSOV fails the operational test, prior tofurther flight, replace that FSOV in accordance with the AOT. (2) If a FSOV passes the operational test, no further action is necessary for that FSOV.

(c) For airplanes having any hydraulic FSOV that has been functionally tested two or more times in accordance with MPD Task Number 29-11-33-0503-1 (for Model A300 series airplanes) or MPD Task Number 29-11-33-01-01 (for Model A310 and A300-600 series airplanes): No further action is required by this AD.

(d) 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, ANM-113.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113.

(e) 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.

(f) The tests shall be done in accordance with Airbus Industrie All Operator Telex (AOT)-29-07, dated August 28, 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, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France. Copies may be inspected at the 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.

(g) This amendment becomes effective on June 9, 1993.