SAIB NM-14-08

FAA Aviation Safety

SPECIAL AIRWORTHINESS

INFORMATION BULLETIN SUBJ: Fuselage: Aerodynamic Fairings SAIB: NM-14-08 Date: January 23, 2014 This is information only. Recommendations aren’t mandatory.

Introduction

This Special Airworthiness Information Bulletin (SAIB) advises owners and operators of certain Cessna Aircraft Company Model 500, 550, S550, 552 and 560 airplanes modified by Sierra Industries, Ltd. STC SA8437SW and Cessna Aircraft Company Model 501 and 551 airplanes modified by Sierra Industries, Ltd. STC SA8458SW (Type Certificate Data Sheets A22CE and A27CE, respectively) of an airworthiness concern regarding radome latch covers.

At this time, the airworthiness concern is not an unsafe condition that would warrant airworthiness directive (AD) action under Title 14 of the Code of Federal Aviation Regulations (14 CFR) part 39.

Background

We have received information of the possibility of defective radome latch covers due to moisture entering the radome area on the subject airplanes. Sierra Industries, Ltd. has issued Service Bulletin SB-SI160-100, dated October 29, 2013. The service information provides procedures for replacing any left- and right-hand radome latch covers having part number (PN) SI160-110-9, with new radome latch covers having P/N SI160-110-14. This replacement will prevent the chance of moisture entering the radome area.

Recommendations

The FAA recommends complying with the actions outlined in Sierra Industries, Ltd Service Bulletin SB-SI160-100, dated October 29, 2013, at the next scheduled maintenance check.

For Further Information Contact

Andrew McAnaul, Aerospace Engineer, FAA/ASW-150, c/o SAT-MIDO-43, 10100 Reunion Place, Suite 650, San Antonio, TX 78216; phone: 210- 308-3365; fax: 210-308-3370;

e-mail: andrew.mcanaul@faa.gov.

For Related Service Information Contact

Sierra Industries, Ltd., 122 Howard Langford Dr., Uvalde, Texas, 78801; phone: 830-278-4481;

fax: 830-278-7649.