Centeral Region Iowa, Kansas, Missouri, Nebraska	901 Locust Kansas City, Missouri 64106
March 11, 2002

Dear Mr. Scovill: This letter responds to your Freedom of Information Act (FOIA) request dated May 1, 2000 (The correct request date is actually May 3, 2001), wherein you asked for any and all documentation related to the follow-up and investigation of potential water contamination in Cessna integral fuel bay (wet wing) equipped aircraft. We have located 76 pages of documentation that is responsive to and within the scope of your request. Copies of 53 documents were previously provided to you under separate cover. Copies of the remaining 23 documents have been forwarded to this office for processing following legal review for releasability. Enclosed you will find (2) partially redacted pages of documentation. We have determined that information contained in the remaining 21 documents, and in each of the related paragraphs in the enclosed documents, are properly subject to the protection afforded by the FOIA's fourth exemption (5 U.S.C. 552(b)(4) and 49 C.F.R. 7.13(c)(4)). These documents contain proprietary information developed by Cessna Aircraft Company and consist of test analysis and results, which are trade secrets. As such, the release of such information into the public domain and their potential availability to the competitors of Cessna Aircraft Company would cause substantial harm to the competitive position of the Cessna Aircraft Company. The undersigned is responsible for this partial denial. You may request reconsideration of this determination by writing to the Assistant Administrator for Region and Center Operations, Federal Aviation Administration, 800 Independence Avenue, SW, Washington, DC 20591. Your request must be made in writing within thirty (30) days from the date of receipt of this letter and must include all information and  arguments relied upon. Your letter must state that it is in appeal from the above described denial of the request made under FOIA. The envelope containing the appeal should be marked "FOIA." Sincerely,   Christopher R. Drum Regional Administrator Enclosures