88-19-07 EMPRESA BRAZILEIRA DE AERONAUTICA S.A. (EMBRAER): Amendment 39-6008. Applicable to all Model EMB-120 series airplanes, certificated in any category. Compliance is required as indicated, unless previously accomplished.
To reduce the potential for flap asymmetry that could lead to loss of control of the airplane in a critical phase of flight, accomplish the following:
A. Within 15 days after the effective date of this AD, revise the FAA-approved Airplane Flight Manual (AFM) to include Revision 9 (for EMB-120RT AFM 120/794) or Revision 14 (for EMB-120 AFM 120/624), as applicable.
B. Within 90 days after the effective date of this AD accomplish the following:
1. Replace the flap actuator solenoid valves with new valves equipped with new filters, in accordance with Embraer Service Bulletin 120-027-0050, dated April 13, 1988;
2. Replace the inlet filter fitting of the flap actuators, in accordance with Embraer Service Bulletin 120-027-0042, dated February 10, 1988; and
3. Install in-line filters to the flap control hydraulic plumbing, in accordance with Embraer Service Bulletin 120-027-0038, dated November 16, 1987.
C. 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 for an alternate means of compliance should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send it to the Atlanta Certification Office.
D. 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, 17900 Pacific Highway South, Seattle, Washington, or FAA, Central Region, Atlanta Aircraft Certification Office, 1669 Phoenix Parkway, Suite 210, Atlanta, Georgia.
This amendment supersedes AD 87-11-03, Amendment 39-5663.
This amendment, 39-6008, becomes effective October 7, 1988.