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

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$Atago Co., Ltd. Salinity Refractometer, Model S-10 Instruction Manual$

33The list of completed modifications identified●MO 71E83 - Leak/Operational Check of the APU, Boost, Jettison Pump and Refuel Valvesaccomplished on November 2, 1990.●MO 98644- Removal of the Fuel Valve Actuator Electro-Magnetic Interference Filter accomplishedon February 26, 1977.MAJOR AND MINOR REPAIRSA list of all major and minor repairs performed on the airplane since the “D” check dated 12/14/92,was provided for review. There were two major repairs performed on the aircraft. The first major repairdated 11/13/92, indicated corrosion damage to the left hand wing front spar web just above the lowerchord. The repair consisted of cutting out the corroded section of the web and splicing in a new sectionbetween Front Spar Station 584 and 614. The second major repair dated 9/30/94, indicated damage to thefuselage skin at the aft edge of the bulk cargo door opening. The repair consisted of repairing thedamaged area and installing a doubler and new fasteners.Several minor repairs were identified and reviewed. These minor repairs were initiated from fatigue,corrosion and other damage. There were no major or minor repairs that were specific to the center wingfuel tank.SUPPLEMENTAL TYPE CERTIFICATESA list of all supplemental type certificates (STC) incorporated on the aircraft were reviewed. The listidentifies installations of various cabin and cockpit equipment. Modifications were made to the upperdeck passenger seating configuration. There were no structural STC modifications accomplished for theaircraft. (Exhibit T)AIRCRAFT WEIGHTThe aircraft was last weighed on 12/11/92, at the completion of the “D” check.REVIEW OF ALL TWA 747 AIRCRAFTAt the time of the maintenance review, TWA had 16 Boeing 747 aircraft listed on their certificate,Twelve of the aircraft were 747-100 series, and four were 747-200 series. Two of the 747-100 series wereplaced on the TWA certificate after the accident in August, 1996. One 747-100 series airplane had beenremoved from service in September, 1994.A ninety-day review of the aircraft maintenance logs for the remaining nine 747-100 series airplaneswas accomplished. During the review, logbook entries were identified in the areas of fuel pump write-ups,electrical write-ups, fueling discrepancies, and fuel indicating system discrepancies. During the reviewthere were no specific write-ups directed toward the center wing fuel tank. Fuel pump removals andreplacements were recorded similar to that of the accident airplane.
All of the center wing fuel tank routine work cards, and where applicable, the non-routine work cardsfrom the last Check “D” for each of these airplanes were reviewed. Non-routine maintenance performedon the center wing fuel tanks identified repairs as follows:34●●●●●●●A torn seal in the center tank sump access door on the right side. The seal was replaced.A jettison pump was removed in order to accomplish “tank work” to remove and reinstall a checkvalve.A fuel leak was found at the bottom of the center wing fuel tank on the outboard right hand side andfour feet forward of the rear spar. The area was cleaned and the leak was sealed.Corrosion (exfoliated) was found between the web angle and center wing tank at fuselage station1241, forward of the aileron control and 43 inches below the ceiling. The corrosion was removed andthe access panels were replaced after the metal work was completed.A new APU fuel line was fabricated and replaced.Corrosion was found in the dry bay on the upper skin in places. The corrosion was removed.A fuel line was replaced in the #3 bay.An access plate was leaking on the left side. An O-ring was installed and the plate was sealed,New fittings were installed after finding a 1/4 inch crack in the bathtub fitting in the bolt hole runningfrom the fuel tank to the forward cargo at station 1001.All of the fuel pump component shop records and testing records were reviewed for each of theseairplanes, The records identified similar discrepancies and overhaul procedures as in the accidentairplane.3, FM OVERSIGHTThe Federal Aviation Administration (FAA) Principal Maintenance Inspector (PMI) currentlyassigned to the TWA certificate is located in Kansas City, MO, the Certificate Holding District Office(CHDO). The PMI was hired by the FAA in July 1988, and served as Partial Program Manager for theBoeing 747/767 fleets, and later as Assistant PMI for two years prior to his appointment as PMI onJanuary 7, 1996. The PMI has no other certificate responsibilities other than TWA, The PMI has anassistant and feels that he has sufficient support and manpower to accomplish proper oversight of thecarrier.The PMI stated that individual inspectors are assigned as Partial Program Managers (PPM) withoversight responsibility for the different make/model aircraft that TWA operates. The PPM’s and fleetsare divided as follows: DC-9, B727, B747/757/767, and L101l/MD-80. At the time of the interview, anew position, the PPM for Powerplants was being created.The PMI stated that the last National Aviation Safety Inspection Program (NASIP) for TWA began onSeptember 25, 1995, and was concluded on October 6, 1995.The NASIP for TWA was one of 141 safety audits directed by the Secretary of Transportation Theaudits were directed for all certificate holders conducting operations under 14 CFR Part 121 and Part 135aircraft with a seating capacity of 10 or more in scheduled operations. Both TWA Operations andAirworthiness issues were inspected. Areas that the NASIP team focused on were: Manuals andProcedures; Records System, Maintenance Facilities; Contractual Arrangements; Reliability Program;Continuing Analysis and Surveillance Program and Aircraft Ramp Inspection.
Page 1: DOCKET NO. SA-516EXHIBIT NO. 11ANAT
Page 6: TWA’s baseline structural inspect
Page 9 and 10: ENGINE #4Serial Number 662463Date I
Page 11 and 12: TWA records indicate that when the
Page 13 and 14: Work Cards D450 andD451 direct the
Page 15 and 16: According to the Minimum Equipment
Page 17 and 18: 16. Jettison Pump - Serial number 7
Page 19: Aircraft Maintenance Log dated July
Page 24 and 25: Aircraft Maintenance Log dated Febr
Page 26 and 27: 25FUEL QUANTITY TANK UNITSThere are
Page 28 and 29: 27●July 7, 1996- The number 3 eng
Page 30 and 31: DEFERRED MAINTENANCE WRITE-UPS ON T
Page 33: TWA utilizes a computer process tha
Page 39: 38At the end of the NASIP inspectio

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

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