Exhibit No. 11A - Group Chairman Factual Report - TWA Flight 800 ...

TWA’s baseline structural inspections (applicable to all TWA Boeing 747 aircraft) are incorporatedinto the following programs. The Check “C” program (OP 9) is accomplished at intervals not to exceed13 months. The OP 16 unit changes and structural checks are accomplished at intervals not to exceed 4years. The OP 11 incorporates tasks that are required as part of the 747 Corrosion Prevention andControl Program. These tasks are required at multiple two-year increments and are to be accomplished atCheck “C” - “2C”, and at OP 16 visits. The OP 1 is accomplished at intervals not to exceed eight yearsand must be accomplished in conjunction with an OP 16 visit.The OP 4, 5, 6, 7, and 8 contain the inspection requirements which are to be accomplished as specifiedfor the baseline structural percentage sampling program.The OP 2 contains tasks taken from the Boeing 747 Supplemental Structural Inspection Document(SSID), as described in TWA ER 1713, applicable only to certain “candidate” aircraft. OP 2 tasks arescheduled at Check “C” 2E (26 months), OP 16 (4 years), and OP 1 (8 years) on these “candidate”aircraft. Aircraft N93119 was not a “candidate” aircraft.Periodic Service (PS) CheckThe PS is accomplished at scheduled layovers of six hours or more at stations staffed by TWAmechanics, or every other operating day maximum, unless a higher maintenance level is accomplished.Routine work required for the PS is listed on Form M47-00-01. A PS incorporates checks for the cockpitand cabin; aircraft exterior; and a final check. The last PS performed on the airplane prior to the accidentwas on July 17, 1996, at JFK before the departure of Flight 800.(Exhibit B - Periodic Service)Aircraft Service (AS) CheckThe AS is accomplished at intervals not to exceed 100 hours of aircraft time in service. It includes, inaddition, all work items performed at the PS. Routine work required at the AS are listed on Forms M47-00-XX. The AS forms are numbered 1 thru 6 and are identified as AS-1 thru AS-6, and are accomplishedin sequence until a Time Control Service is accomplished. The AS incorporates checks for the cockpitand cabin, exterior fuselage, wings, gear and empennage; engines and struts; oil, hydraulic, waterservicing, and fuel tank sumping; and a final check.The last AS-1 was accomplished on July 13, 1996, at JFK after the landing of Flight 803.(Exhibit C - Aircraft Service)Time Control Service (’TCS)The TCS is accomplished at intervals not to exceed 1,200 hours of aircraft service. The TCS zeros theAS checks, and the TCS is zeroed by the Check “C” and the OP 16. Routine work is accomplished onForm M47-00-03.The last TCS was accomplished on April 15, 1996, at JFK.(Exhibit D - Time Control Service)5