1 ABS Spar Web Investigation Report to Wichita ACO/ FAA Small Airplane Directorate Wichita, Kansas July 23, ABS-ASF Proprietary Data 7/23/2009

Mandatory Service Bulletins MSB 2269 issued August 1989 –Barons (except 58P and 58TC) –Travel Airs MSB 2360 issued November 1990 –Bonanzas H35 and later –All Model 33 Debonairs/Bonanzas –All Model 36 Bonanzas Required inspection and repairs 2ABS-ASF Proprietary Data 7/23/2009

Airworthiness Directives AD –Incorporates MSB 2269 (multiengine) AD –Incorporates MSB 2360 (singe engine) –One time inspection –Required reporting to Beech No record of any data AD –Repetitive inspections –No reporting 3ABS-ASF Proprietary Data 7/23/2009

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Current AD Inspection Initial No cracks: every 500 hours thereafter Small cracks: every 200 hours thereafter 5ABS-ASF Proprietary Data 7/23/2009

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SurveyReported% ModelResponsesCracksCracked Notes 35 (O/IO- 470) % Short body, <3300 MGW 35 (IO-520) % Short body, 3300 MGW or greater 33 (IO-470) % Short body, <3300 MGW 33 (IO-520) % Short body, 3300 MGW or greater % Long body, MGW 3600 lbs A % Long body, MGW 3600 lbs (3650 lbs 1984 and later) A36TC2100.0% Long body, MGW 3600 lbs B36TC % Long body, MGW 3850 lbs Baron 55/ % Short body, twin-engine Baron % Long body, twin engine % Short body, twin-engine ABS Member Survey 7ABS-ASF Proprietary Data 7/23/2009

Location of Cracks 8ABS-ASF Proprietary Data 7/23/2009

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FAA No-Crack Policy The Old Policy –For cracks found in structural components some ADs have allowed continued operational flight if the cracks are smaller than a certain size. –Inspection requirements will be more stringent for known cracks. The New Policy –Continued operational flight with known cracks in primary structural components should not be allowed. –Small Airplane Directorate will adhere to this basic policy. 10ABS-ASF Proprietary Data 7/23/2009

ABS Position Known issue for two decades Current inspection process has ensured ongoing safety No history of in- flight failure ABS asked FAA for time to investigate 11ABS-ASF Proprietary Data 7/23/2009