89-19-09 FOKKER: Amendment 39-6323. (Docket No. 89-NM-95-AD)
Applicability: Model F-27 series airplanes, Serial Number 10202, 10105 through 10684, 10686, 10687, and 10689 through 10692, certificated in any category.
Compliance: Required as indicated, unless previously accomplished.
To prevent reduced structural capability of the fuselage and subsequent decompression of the airplane, accomplish the following:
A. For airplanes in post-Service Bulletin F27/21-30 configuration, within 30 days after the effective date of this AD or upon the accumulation of 30,000 landings, whichever occurs later, inspect the external skin at the riveted connections between fuselage Station 1400 and the partial pressure bulkhead, in accordance with Fokker Service Bulletin F27/53-108, dated February 3, 1989. If cracks are found, repair prior to further flight, in accordance with the service bulletin.
B. For airplanes in pre-Service Bulletin F27/21-30 configuration, within 30 days after the effective date of this AD, or upon the accumulation of 50,000 landings, whichever occurs later, inspect the external skin at the riveted connections between Fuselage Station 1400 and the partial pressure bulkhead in accordance with Fokker Service Bulletin F27/53-108 dated February 3, 1989. If cracks are found, repair prior to further flight, in accordance with the service bulletin.
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, 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.
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 Fokker Aircraft USA, Inc., 1199 N. Fairfax Street, Alexandria, Virginia. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, C-68966, Seattle, Washington 98168.
This amendment (39-6323, AD 89-19-09) becomes effective on October 14, 1989.