# SAIB CE-00-23: - Type: Special airworthiness information bulletin (advisory, not mandatory) - Status: Current - Revision: 0 - Issued: June 15, 2000 - Products: Navion All models - Product type: Aircraft, Small Airplane - PDF: https://openairdocs.org/files/sha256/d3/cb/d3cb57cad969f83e193e70d4a78b75f4758ae1b9cd87ef17cb8be4135d496706 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/32C6532EA0EC69688625721F0052EBB3.0001 - Page: https://openairdocs.org/saib/CE-00-23 ## Text **SPECIAL** **AIRWORTHINESS** **INFORMATION** **BULLETIN** **REGULATORY SUPPORT DIVISION P.O. BOX 26460 OKLAHOMA CITY, OKLAHOMA 73125-0460** U.S. Department of Transportation Federal Aviation Administration No. CE-00-23 June 15, 2000 SAIB’s are posted on the internet at http://av-info.faa.gov 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 of Navion airplanes (all models) of reports of corroded flight control cables and methods for inspecting for this condition. BACKGROUND: Aileron Control Cables The FAA received a recent report of corroded and deteriorated aileron control cables. The area of damage was located in the first rib bay outboard of the wheel well. One aileron control cable had only two strands holding it together. The exposed e nds of the cables, in the wheel well and at the aileron bell crank, appeared normal and serviceable. The aileron control cables can be inspected by rem oving the flap control rod bolt, and allowing the flaps to hang down 90 0. The aileron control cables can then be inspected through the wing trailing edge lightening holes after removing the lightening hole covers or gap seals if installed. Elevator control cables Two reports were received concerning corroded elev ator control cables in the cabin under the rear passenger seat. This area, also containing the r udder cables and the aileron interconnect cables is vulnerable to contamination with dirt, foreign object damage (FOD), and moisture accumulations, especially when an auxiliary fuel tank is installed under the rear seat. If the aircraft does not have an under seat fuel tank, these cables can be inspect ed by removing the panel under the front edge of the rear seat to access the cables. Also, this will provide inspection access for the pulleys and internal structure. RECOMMENDATION: Aileron Control Cables The FAA recommends that the aileron cables be visually and physically inspected during each annual inspection. The entire length of the control cables should be checked visually and physically (run a shop towel or rag over the cable to see if a ny loose strands catch on the rag) for evidence of corrosion or damage (broken strands, etc.). If th e cable integrity is still in doubt, the cables should be disconnected from the bell crank and pulled into the wheel well for further inspection. 2 CE-00-23 Aileron cable routing, over the two pulleys outboard of the wheel well, makes it easy to cross the cables during installation. Before disconnecting the cables, it would be wise to make a drawing of the cable routing to reduce the chance of miss-routing the cables during reinstallation. Attaching a guide wire, cable, cord or other device to the cable end prior to removal should insure proper routing over the pulleys during reinstallati on. Also, it would be wise to note which hole on the bell crank connects to the cable turnbuckle for k. Checking for correct flight control operation after installation should eliminate errors. Check for jammed or frozen aileron cable pulleys, especially the ones just outboard of the wheel well. If the pulley does not turn, the action of the cable passing over it will likely damage the cable and/or pulley. Elevator control cables Two other reports were received concerning corroded elevator control cables in the cabin under the rear passenger seat. This area, also containing th e rudder cables and the aileron interconnect cables is vulnerable to contamination with dirt, FOD, and moisture accumulations, especially when an auxiliary fuel tank is installed under the rear seat. If the aircraft does not have an under seat fuel tank, these cables can be inspected by removing the pa nel under the front edge of the rear seat to access the cables. Also, this will provide inspection access for the pulleys and internal structure. For aircraft with a fuel tank installed under the rear seat, access to cables and pulleys may be obtained by inspecting from underneath the bagga ge compartment after removing either the inspection plates in the aft wing filet fairing or by removing the fairing itself. The cables and pulleys will be readily visible on aircraft with th e after-market “McKenna” fairings when the lower half of the fairing is removed to inspect the flap linkage and actuating cylinder. Elevator trim tab cables The elevator trim tab cables (enclosed in a “Bow den Cable” type housing) should be inspected at the exposed ends with the trim adjusted both fu ll up and full down. If there is any indication of damage, all four cables should be replaced. Service Difficulty Reports (SDR) The FAA requests that any findings of corroded or otherwise damaged flight control cables including airplane model, total hours, type of storage environment (hanger/dry/wet climate/etc.) and any other airframe corrosion damage, be reported to the FAA via the SDR system. SDRs may be reported on FAA Form 8010-4, Malfunction or Def ect Report, or electronically by contacting Isaac Williams, Aviation Safety Inspector; Aviation Data Systems Branch, (AFS-620); telephone: (405) 954-6488; or email: isaac.a.williams@faa.gov. FOR FURTHER INFORMATION CONTACT: FAA, Chicago Aircraft Certif ication Office; Nick Miller, Aerospace Engineer; 2300 East Devon Avenue, Des Plaines, IL 60018; telephone: (847) 294-7837, fax (847) 294-7834; email: nick.miller@faa.gov or FAA, Small Airplane Directorate; Karl Schletzbaum, Aerospace Engineer; 1201 Walnut, Suite 900, Kansas City, MO 64106; telephone: (816) 329-4146, fax: (816) 329-4090. CHANGE OF ADDRESS NOTICE Airworthiness Directives (AD) for a particular make and model of aircraft are mailed to the aircraft owners using the permanent mailing address on file with the FAA Registry. If you need to change your address, YOU MUST SIGN THIS FORM AND MAIL TO FAA Aircraft Registration. A revised Certificate of Aircraft Registration will be mailed to you without charge. SIGNATURE REQUIREMENTS: MAIL TO: ___ Individual Owner must sign FAA Aircraft Registry, AFS-750 ___ Partnership, a general partner must sign Mike Monroney Aeronautical Center ___ Co-owner, each co-owner must sign continuing PO Box 25504 as necessary on an attached sheet Oklahoma City, OK 73125-0504 ___ Government, any authorized person may sign AIRCRAFT REGISTRATION #: SERIAL #: MAKE: MODEL: **ADDRESS CHANGE REQUESTED CANCELLATION OF REGISTRATION REQUESTED** **NAME OF CERTIFICATE HOLDER STREET** **CITY STATE ZIP** COUNTRY SIGNATURE (In Ink) TITLE DATE SIGNATURE (In Ink) TITLE DATE (Check applicable block, sign and date) ρ 1. Aircraft Sold To: (Purchaser’s name and address) ______________________________________________ ______________________________________________ ______________________________________________ ρ 2. Aircraft Destroyed/Scrapped ρ 3. Aircraft Exported To: ____________________________ ρ 4. Other, Specify _________________________________ I (we) request cancellation of registration for the above reason U.S. Department of Transportation Federal Aviation Administration Regulatory Support Division P.O. Box 26460 Oklahoma City, OK 73125-0460 AFS-610 Official Business Penalty for Private Use $300 **FLIGHT INFORMATION** **CRITICAL TO** **FLYING SAFETY URGENT** **FORWARD TO AIRCRAFT** **OPERATOR** **FIRST-CLASS MAIL** **POSTAGE & FEES PAID FAA PERMIT NO. G44** --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.