# SAIB ACE-99-12: 

- Type: Special airworthiness information bulletin (advisory, not mandatory)
- Status: Current
- Revision: 0
- Issued: December 30, 1998
- Products: Short Brothers Skyvan SC.7
- Product type: Aircraft, Small Airplane
- PDF: https://openairdocs.org/files/sha256/2a/94/2a942844d48ab2006c712c2b0b7d8ac77724db8c3121b2bce5390c29d92be345
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/850ACB064A94F90C8625721F0052EC51.0001
- Page: https://openairdocs.org/saib/ACE-99-12

## Text

**SPECIAL**

**AIRWORTHINESS**

**INFORMATION**

**BULLETIN**

**AIRCRAFT CERTIFICATION SERVICE 800 INDEPENDENCE AVENUE, S.W.**

**WASHINGTON, DC 20591**

U.S. Department of Transportation Federal Aviation Administration

No. ACE-99-12 December 30, 1998

Published by: FAA, AFS-610, P.O. Box 26460, Oklahoma City, OK 73125 This is issued for informational purposes only and any recommendation for corrective action is not mandatory.

Introduction The purpose of this Special Airworthiness Informa tion Bulletin (SAIB) is to inform registered owners/operators of Short Brothers Skyvan SC.7 ai rcraft of reports of pitting corrosion and stress corrosion cracking of the flight control rods.

Background The Short Brothers have received reports of p itting corrosion and stress corrosion cracking in the aircraft flight control system. Consequently, the manufacturer issued Service Bulletin 27-74 which required a visual inspection and a dye penetrant insp ection of the rudder, aileron, elevator, trim and flap control rods. The initial inspection was to be completed within 60 hours of receipt of the Service Bulletin, and subsequent inspections at 1200 hour or 2 year intervals (whichever is lesser).

Recommendation The FAA is recommending, but not requiring, that ow ners/operators of Short Brothers Model SC.7 airplanes inspect the flight control rods thoroughly as detailed by the Accomplishment Instructions of Short Brothers Service Bulletin 27-74 Revision 2, da ted April 29, 1997. It is also recommended that the control rods be visually inspected whenever exposed during routine maintenance.

For Further Information Contact:

FAA, Small Airplane Directorate, Atten tion: Mr. Roger P. Chudy, ACE 112, 1201 Walnut, Suite 900, Kansas City, MO 64106, telephone (816) 426-6934, fax (816) 426-2169.

Copies of Short Brothers Service Bulletin 27- 74 Revision 2, dated April 29, 1997 may be obtained from Short Brothers PLC, P.O. Box 241, Airport Road, Belfast BT3 9DZ, Northern Ireland.

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