AD 90-17-12

90-17-12 EMPRESA BRASILEIRA DE AERONAUTICA, S.A. (EMBRAER): Amendment 39- 6696. Docket No. 90-NM-59-AD.

Applicability: EMBRAER Model EMB-120 series airplanes, Serial Numbers 120004 and 120006 through 120177, certificated in any category.

Compliance: Required within 120 days after the effective date of this AD, unless previously accomplished.

To prevent engine failure due to propeller overspeed, accomplish the following:

A. Install a flight idle position electromechanical lockout device in accordance with EMBRAER Service Bulletin Number 120-076-0009, Revision 1, dated February 23, 1990, or Revision 2, dated May 3, 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, Atlanta Aircraft Certification Office, FAA, Central Region.

NOTE: The request should be submitted directly to the Manager, Atlanta Aircraft Certification Office, ACE-115A,and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Atlanta Aircraft Certification Office.

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 EMBRAER, 276 S.W. 34th Street, Fort Lauderdale, Florida 33315. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue, S.W., Renton, Washington, or at the FAA, Central Region, Atlanta Aircraft Certification Office, 1669 Phoenix Parkway, Suite 210C, Atlanta, Georgia.

This amendment (39-6696, AD 90-17-12) becomes effective on September 17, 1990.