90-21-14 AIRBUS INDUSTRIE: Amendment 39-6771. Docket No. 90-NM-94-AD.
Applicability: Model A320 series airplanes, which have not incorporated Modification 21892, certificated in any category.
Compliance: Required within 30 days after the effective date of this AD, unless previously accomplished.
To prevent failure of the ram air turbine (RAT) to deploy on command due to a malfunction of the extension jack, accomplish the following:
A. Remove ejection jack, Part Number (P/N) 114160003, and replace it with a new or modified ejection jack, P/N 114160004 or 114160005, in accordance with Airbus Industrie Service Bulletin A320-29-1030, dated February 15, 1990.
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 (39-6771, AD 90-21-14) becomes effective on November 19, 1990.