# AD 91-17-03: Main Landing Gear Attachment Lug

- Type: Airworthiness directive
- Status: Current
- Products: Fokker Services F27 Mark 050, F27 Mark 100, F27 Mark 200, F27 Mark 300, F27 Mark 400, F27 Mark 500, F27 Mark 600 and F27 Mark 700
- Effective: September 20, 1991
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-8001
- Docket: 91-NM-68-AD
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F204CF7FD7C64BF486256A250063CDF1.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/91-17-03

## The airworthiness directive

91-17-03 FOKKER: Amendment 39-8001. Docket No. 91-NM-68-AD. Applicability: Model F-27 series airplanes; serial numbers 10102, 10105 through 10684, 10686, 10687, and 10689 through 10692; certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent collapse of the main landing gear (MLG), accomplish the following:

A. Within 180 days after the effective date of this AD, or prior to the accumulation of 500 landings after the effective date of this AD, whichever occurs first, perform a high frequency eddy current inspection of both sides of the actuating ram attachment lug in accordance with Part 1 of the Accomplishment Instructions of Fokker Service Bulletin F27/54-47, dated November 30, 1990.

B. If cracks are found, prior to further flight, replace the MLG drag strut attachment fitting in accordance with Part 2 of the Accomplishment Instructions of Fokker Service Bulletin F27/54-47, dated November 30, 1990.C. An alternative method 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 forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate.

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.

E. The inspection and replacement requirement shall be done in accordance with Fokker Service Bulletin F27/54-47, dated November 30, 1990. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. Copies may be inspected at the FAA, Transport Airplane Directorate, Renton, Washington; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C.

This amendment (39-8001, AD 91-17-03) becomes effective on September 20, 1991.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-817](https://openairdocs.org/tcds/A-817): Fokker Services B.V.; names 8 of 8 models: F27 Mark 500, F27 Mark 100, F27 Mark 700, F27 Mark 200, F27 Mark 400, F27 Mark 600, F27 Mark 050, F27 Mark 300

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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