THE OFFICIAL PUBLICATION FOR BONANZA, BARON & TRAVEl ...

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ABS MEMBERSHIP SERVICES Monthly ABS Magazine · One-on-One Aircraft Advice • Beechcraft Pilot Proficiency Program · Aircraft Service Clinics · Air Safety Foundation Research & Development Projects · Regulofory & Industry Representation · Annual Convention & Trade Show • Affiliated Aircraft Insurance with Falcon Insurance · Members-only Website Section · Educational Books, Videos & Logo Merchandise · ABS Platinum Visa® (with RAPID Discounts) • Tool Rental Program · Professionally Staffed Headquarters 1922 MIDFIELD ROAD, P.O. BOX 12888 , WICHITA, KS 67277 ASS exists to promote oviation safety and ftying enjoymentthraugh TEl: 316-945-1700 FAX 316-945-1710 E-MAIL:ABSmail@bononzo.org education and information-sharing among owners and operators of OFFICE HOURS: M-f 8:30 am - 5 pm (Central Time) Bonanzas, Borons, Debonairs and Travel Airs throughout the warld. ABS BOARD OF DIRECTORS TERM EXPIRES PRESIDENT ARTHUR W. BROCK (Area 6) ·2009 Committee Choir: Events, Executive, Plonning. Technicol 2631 Colt ReI" Rancho Palos Verdes, CA 90275 phone: 310-548-8507. fox: 310-548-3767 e-mail: brockorl@oot.com VICE PRESIDENT BILL STOVAll (Area 6) ·2009 Committee Choir: AS~ Project Funding, Media 32675 Woodside Or" Evergreen, CO 80439 phone: J03..67(}'22.44, fox: 303-670-3385 e-mail: billstovoll@evcohs.com SECRETARY RONALD LESSLEY (Area 5) Committee Cholr:'Bylows, Membership PO Box 1023. Claremore, OK 74018 phone: 918-341-0741 ; fax 918-341-4464 e-mail: ronlessley@sbcglobol.nel TREASURER STEPHEN P. BLY<strong>THE</strong> (At-large) Committee Choir: Finance. HR 21065 Sorclay lane, lake Forest, CA 92630 phone: 949-583-9500 ext. 131 , fax: 949-583-06d9 e-mail: spb@blytheco.com 2008 2008 ASST. TREASURER CHARLES S. DAVIDSON, M.D. (Area 3) ·2009 Committee Choir: Aeromedical. Education 1605 Wood Duck Ln .. Kill Devil Hills. NC 27948 phone: 252441-5698, fox: 252-441-5853 e-mail: chor1es_dovidson@chorter.net GREGORY KESHISHIAN (Area 1) 401 East 74th Street. New'looc NY 10021 phone 212-535-6617 e-mail: gk(!i)gk-portners.com KEITH W. KOHOUT (Area 2) 2128 East 2nd Streel. Covington, KY 41011 phone: 513-479-2533 e-mail: kk@flightresource.com ANDREW REARDON (Area 4) 5S5 W. Westrelgh Rood, lake Forest, Il6004&'2717 phone: 312-984-3816 e-mail: ofreardon@ttx.com 2010 2010 2010 JON LUY (Area 7) '2008 Committee Choir: Nominating, ReGional 205 Amador Rood. Sutter Creek, CA 95685 phone: 209-267-0167, fox: 209-267-0247 e-mail: jdebonoir@hotmoil.com • Second and/or final term Executive Director, NANCY JOHNSON AB5-ASF Service Clinics provide a valuable 'second opinion' about the mointenance state 01 your Beechcraft. You 'll follow our highly experienced inspector as he checks your airplane in areas that often meril a closer look. Bring your mechanic so you can both learn more about your Beechcraft! On~ 5166 for Bonanza'iiDebonairs, 5233 for Baron..-rrovel Airs DATE LOCATION HOST/AIRPORT Apr 17-20 Tulsa, Oklahoma Roodhouse Aviation (RVS) May 8-11 Madero, California Sorber Aviation (MAE) Jun 5-8 Spokane, WaShington Spokane Airways (GEG) JuI IO-13 Greeley, Colorado Harris Aviation (GXY) Aug 21-24 Nashua, New Hampshire Oct 2-5 Rockford, Illinois Emery Air (RFD) Nov 6-9 Edmonds Aircraft Service (ASH) Fernandina Beach, Florida Island Aviation (55J) Dec 4-7 Ramona, California Cruiseair Aviation (RNM) Register online ot www,bonanza.org or ASS headquarters 316-945-1700 Apr 25-27 Concord, California May 16-18 Colurnbus, Ohio (CMH) Sept 5-7 Manchester, NH (MHT) Sept 19-21 Waukesha, WI (UES) Oct 3-5 Santo Moria, CA (SMX) Oct 24-26 Richmond, VA (RIC) Nov 14-16 Tulsa, OK (RVS) Visit www.bppp.org for more info or to register. Bonanzas/Barons/Debonairs/Travel Airs at all locations. Cockpit Companion course available. Call the BPPP Registration Office to make arrangements: 97D-377-1877 or fax 97D-377-1512. Eligible for 70 ABS Aviator points. PAST PRESIDENTS BJ. McClonohon. MD 1967-1971 Fronk G. Ross (dec.) 1971-1973 Russell W. Rink (dec.) 1973--1975 Hypolite 1. lOndry, Jr., MD 1975-1976 Colvin B. Eorly, MD, PhD 1976-1977 Copt. Jesse FAcloms USN(R) (dec.)1977-1978 Dovid P Borton 1976-1979 1979-1960 Fred A. Driscoll. Jr. (dec.) 1980-1981 E.M Ande
ABS-ASF spar web investigation It is difficult to project the facts in a dynamic situation when there is a sig· nificant delay between the time of reporting and publishing. I'm writing this in early March while you are reading it in mid·April. by which time I hope some importa nt and positive events will have taken place. Please bear with me as I bring you up to date on where we are right now. How we got to where we are As you know, a substantial part of the fleet is operating under two Airworthiness Directives (ADs)--{)ne for Bonanzas and Debonairs and another for Travel Airs and Barons-that require periodic inspections of the front wing spar carry-thru assembly for cracking, monitoring any cracks found and repairing them if they grow beyond specified limits. In 1996 the FAA adopted a policy that no longer allows continued operations wi th any cracks in primary structure, and in 2004 they notified ABS of their intention to revise the ADs to impose that "no cracks" policy on our airplanes. The only approved repair is installation of a doubler kit supplied by the Beech factory. This repair is very difficult to accomplish correctly and everyone agrees that improper installation poses a real threat to the integrity of the airframe. We have been operating under the inspection and monitoring program for 20 years and have a fleet-wide history of perhaps 60 mi//ioll flight hOllrs without a single mishap. Furthermore, in 2004 there was a growing body of qualified engineering opinion that the repair kit did not address the root cause of the cracki ng. In view of the fleet history, engineering opinions and the difficulties and risks associated with the repair, the ABS Technical Committee was concemed that eliminating the crack-monitoring program and requiring installation of the doubler kit in all cracked airplanes might not be in the best interests of our members. Although we asked, the factory was unwilling to share any engineering information. Consequently, the ABS Air Safety Foundation engaged two highly regarded consulting engineers to review the situation. Although suggesting a probable cause of the cracking, more importantl y, the reports recommended further study. ABS-ASF then sought bids and eventually contracted for an engineeri ng study to definitively determine the cause of the cracking and analyze the safety issues involved. Although we clearly hoped the study would provide the engineering basis for continuing the inspection and monitoring program. our primary goal was to understand the physics of the structure, the loads imposed on it, what was causing the craCking and to what extem small cracks posed a safety issue. Responding to our request, the FAA has held off on further action to allow us time to complete our investigation and has indicated they wi ll review and consider the results of that investigation in their final evaluation. Their forbearance in giv- ing us this window has been greatly appreciated. The study contract The investigation was conducted by J.B. Dwerlkotte Associates (JBDA) and consisted of developing a computer model (finite element model) of the airframe and the carry-thru structure, developing the loads to apply, instrumenting an aircraft (thanks to owner Robert Majoros), gathering stress data from actual flights, predicting crack propagation and analyzing and drawing conclusions. We received the contract fina l report from JBDA in ovember 2007. It is not an exaggeration to describe it as a very hefty document, both in terms of its physical size as well as its depth of content. It has been a real challenge for our Tech nical Committee to absorb its substance and put it in proper perspective. There was no way we could do that on our own and we relied heavily on our engineeri ng consultant, retired Boeing chief of structures engineering Peter Harradine. We have gone through about six rounds of detailed questions and answers, including several hours on the phone with JBDA. The bottom line is that the study is inconclusive in sever· al key areas. It just doesn't go far enough to get the answers that we need. That is not to say the study didn 't yield impor. tam insights and it does provides ABS-ASF with some really valuable anal ysis and data. But we are not able to answer some critical questions, at least not to the level of engineering certainty that we feel is necessary to go forward. JBDA worked diligently, accomplished a great deal and has been extremely cooperati ve during this review period and we have concluded their contract. Where we want to go JBDA and Peter Harradine are in total agreement that a fo llow-on phase of the investigation, expanding on the work already performed, should yield the definitive answers that we eek. There is no question that we have come a long way down the road of understanding, but we know we are not yet at our destination. Consequently, the Technical Committee has asked Peter to prepare a statement of work for a subsequent contract to take the investigation to the next level, and JBDA has agreed to perform the work in the near term. When we have an agreed-upon statement of work, price and schedule, we will determine whether to expand the investigation. If we decide to proceed, we'll then ask the FAA for their continued patience to allow us to complete it. By the time you read thi , we may have already announced the outcome on our website. If so, you already know how it comes out I hope you're smiling! Until next momh. -Art ABS April 2008 www.bonanza.org Page 10710
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