| AD Number | 91-05-10 | Status | Active |
| Effective Date | March 25, 1991 | Issue Date | Not specified |
| Docket Number | 90-NM-233-AD | Amendment | 39-6905 |
| Product Type | ["Aircraft"] | Product Subtype | ["Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Not specified |
| Model(s) | F.28 Mark 1000 F.28 Mark 2000 F.28 Mark 3000 F.28 Mark 4000 |
91-05-10 FOKKER: Amendment 39-6905. Docket No. 90-NM-233-AD.
Applicability: Model F-28 Mark 1000, 2000, 3000, and 4000 series airplanes, as listed in Part II of Fokker Report No. SE-243, Issue No. 1, dated June 1, 1990, certificated in any category.
Compliance: Required as indicated, unless previously accomplished.
To prevent reduced structural integrity of the airplane, accomplish the following:
A. Accomplish the structural modifications according to the service bulletins and the "incorporation threshold" listed in Part II of Fokker Report No. SE-243, Issue No. 1, dated June 1, 1990 as follows:
1. For airplanes that have accumulated time-in-service exceeding the specified "incorporation threshold" as of the effective date of this AD, the structural modifications must be accomplished by the following dates:
a. July 1, 1996, for those service bulletins to which [Note 1] applies.
b. July 1, 1993, for those service bulletins to which [Note 2] applies.
c. July 1, 1993, or 14 years after the airplane's manufacturing date, whichever occurs later, for service bulletins to which [Note 4] applies.
2. For airplanes that have accumulated time-in-service less than the specified "incorporation threshold" as of the effective date of this AD, the structural modifications must be accomplished before the applicable "incorporation threshold" or by the following dates, whichever occurs later:
a. July 1, 1996, for service bulletins to which [Note 1] applies.
b. July 1, 1993, for service bulletins to which [Note 2] applies.
c. July 1, 1993, or 14 years after the airplane's manufacturing date, whichever comes later, for service bulletins to which [Note 4] applies.
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 Fokker Aircraft USA, Inc., 1199 N. Fairfax Street, Alexandria, Virginia 22314. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington.
This amendment (39-6905, AD 91-05-10) becomes effective on March 25, 1991.