91-01-01 AIRBUS INDUSTRIE: Amendment 39-6845. Docket No. 90-NM-148-AD.
Applicability: Model A320-111, -211, and -231 series airplanes; Serial Numbers 003 through 058, 060 through 067, 069 through 072, 074 through 083, and 085; certificated in any category.
Compliance: Required as indicated, unless previously accomplished.
To prevent loss of the emergency electrical generation system, accomplish the following:
A. Within 150 days after the effective date of this AD, in Zone 125 of the avionics compartment, remove one GCU identified as 1XE part number (P/N) 520754, and install a modified GCU identified as 1XE P/N 520915, in accordance with Airbus Industrie Service Bulletin A320-24-1035, Revision 1, dated February 27, 1990. Following installation, perform an operational test of the Emergency Generation System, the Emergency Generator Control Unit from Centralized Fault Display System, and the Static Inverter, in accordance with the service bulletin.
B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate.
NOTE: The request should be submitted directly to the Manager, Standardization Branch, ANM-113, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Standardization Branch, ANM-113.
C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.
All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Airbus Industrie, Airbus Support Division, Avenue Didier Daurat, 31700 Blagnac, France. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington.
This amendment (39-6845, AD 91-01-01) becomes effective on January 28, 1991.