AD 98-17-05 Airworthiness Directives; Airbus Model A319, A320, A321, A330, and A340 Series Airplanes Equipped With AlliedSignal RIA-35B Instrument Landing System Receivers

Models named: A319, A320, A321, A330, A340 series. Read the applicability below — it usually turns on serial or part numbers too.

Model A319, A320, A321, A330, and A340 series airplanes; equipped with AlliedSignal RIA-35B Instrument Landing System (ILS) receivers, part number (P/N) 066-50006-0202; certificated in any category. Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Required as indicated, unless accomplished previously. To detect and correct faulty ILS receivers and to ensure that the flightcrew is advised of the potential hazard of performing ILS approaches using a localizer deviation from a faulty ILS receiver, and advised of the procedures necessary to address that hazard, accomplish the following: (a) Within 10 days after the effective date of this AD, accomplish the requirements of paragraphs (a)(1) and (a)(2) of this AD. (1) Revise the Limitations Section of the FAA-approved Airplane Flight Manual (AFM) to include the following statement. This may be accomplished by inserting a copy of this AD into the AFM. ``Instrument Landing (ILS) 1(2) Fault If `ILS 1(2) FAULT,' electronic centralized aircraft monitor (ECAM) caution, is triggered at any time during the flight, the affected ILS receiver must be considered as no longer available until it is replaced, and the flight crew must make the appropriate entry in the aircraft maintenance log prior to the next flight. During an ILS or LOC approach, the glide slope deviation and localizer deviation from ILS receivers 1 and 2 must be monitored and compared. If a discrepancy between the glide slope deviation and/or localizer deviation provided by ILS receivers 1 and 2 is experienced, interrupt the ILS approach. Do not conduct ILS or LOC approaches using a single ILS receiver. If ILS 1 has experienced an unannunciated failure there may be late or false ground proximity warning system (GPWS) alerts/ callouts. Affected GPWS features may include sink rate alerts, glide slope deviation alerts, and altitude callouts.'' (2) Following accomplishment of the AFM revision required by paragraph (a)(1) of this AD, if a caution message reading ``ILS 1 FAULT,'' ``ILS 2 FAULT,'' or ``ILS 1+2 FAULT'' is displayed intermittently or continuously on ECAM during any portion of any flight: Within 10 days after the message is first displayed, remove the faulty ILS receiver and install either a new or serviceable part that has the same P/N as the ILS receiver that was removed from the airplane or a part that has been modified in accordance with AlliedSignal Electronic and Avionics Systems Service Bulletin M-4431 (RIA-35B-34-7), Revision 1, dated May 1998. Note 2: The ECAM messages described in paragraph (a)(2) of this AD, when displayed to the pilot, are normally preceded by ``NAV'' indicating a fault in the navigation system. (b) Replacement of all RIA-35B ILS receivers, P/N 066-50006- 0202, with RIA-35B ILS receivers that have been modified in accordance with AlliedSignal Electronic and Avionics Systems Service Bulletin M-4431 (RIA-35B-34-7), Revision 1, dated May 1998; on which the P/N's have been converted to 066-50006-1202; constitutes terminating action for the requirements of this AD. After the replacement has been accomplished, the limitations required by paragraph (a)(1) may be removed from the AFM. Note 3: Modification of all AlliedSignal RIA-35B ILS receivers, P/N 066-50006-0202, accomplished prior to the effective date of this AD in accordance with AlliedSignal [[Page 43297]] Electronic and Avionics Systems Service Bulletin M-4431 (RIA-35B-34- 7), dated April 1998; is considered acceptable for compliance with the modification specified in this amendment. (c) As of the effective date of this AD, no person shall install on any airplane an AlliedSignal RIA-35B ILS receiver, P/N 066-50006- 0202, that has been found to be discrepant [that is, an ILS receiver for which one of the caution messages specified in paragraph (a)(2) of this AD was displayed on the ECAM] unless the discrepancy has been corrected by modifying the ILS receiver in accordance with AlliedSignal Electronic and Avionics Systems Service Bulletin M-4431 (RIA-35B-34-7), Revision 1, dated May 1998. (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, International Branch, ANM-116, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Operations Inspector or Principal Avionics Inspector, who may add comments and then send it to the Manager, International Branch, ANM-116. Note 4: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the International Branch, ANM-116. (e) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (f) This amendment becomes effective on August 28, 1998. Issued in Renton, Washington, on August 6, 1998. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-21656 Filed 8-12-98; 8:45 am] BILLING CODE 4910-13-P