AD 89-21-08

89-21-08 CASA: Amendment 39-6348. Docket No. 89-NM-125-AD.

Applicability: All Model C-212 series airplanes, certificated in any category.

Compliance: Required within 60 days after the effective date of this AD, unless previously accomplished.

To prevent airframe damage due to flutter caused by certain single failure conditions of the trim control system components, accomplish the following:

A. Replace elevator, rudder, and aileron trim control system components, in accordance with CASA Service Bulletin 212-27-25, Revision 6, dated February 24, 1989.

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, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it 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 Construcciones Aeronatuicas S.A. (CASA) Getafe, Madrid, Spain. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the Standardization Branch, 9010 East Marginal Way South, Seattle, Washington.

This AD supersedes AD 87-18-08 (Amendment 39-5724) as revised by AD 87-18-08 R1 (Amendment 39-6013) which became effective on October 11, 1988.

This amendment (39-6348, AD 89-21-08) becomes effective on October 5, 1989.