NATIONAL TRANSPORTATION SAFETY BOARD Office of Aviation Safety Washington, D.C January 31, 2000

Transcription

1 NATIONAL TRANSPORTATION SAFETY BOARD Office of Aviation Safety Washington, D.C January 31, 2000 ADDENDUM TO SYSTEMS GROUP CHAIRMAN FACTUAL REPORT CONCERNING FUEL QUANTITY INDICATION SYSTEM PHOTOGRAPHS A. ACCIDENT : DCA96MA070 Location : East Moriches, New York Date. July 17, 1996 Time : 2031 Eastern Daylight Time Airplane : Boeing , N93119 Operated as Trans World Airlines (TWA) flight 800 B. SYSTEMS GROUP FEBRUARY 9-13, 1998 Chairman : Robert L. Swaim National Transportation Safety Board Washington, D.C. C. SUMMARY On July 17, 1996, at 2031 EDT, a Boeing , N93119, crashed into the Atlantic Ocean, about 8 miles south of East Moriches, New York, after taking off from John F. Kennedy International Airport (JFK). All 230 people aboard were killed. The airplane was being operated as a 14 Code of Federal Regulations (CFR) Part 121 flight to Charles De Gaulle International Airport (CDG), Paris, France, as Trans World Airlines (TWA) flight 800. This addendum is to place photographs of the fuel quantity indication system and associated/nearby wreckage into the public docket. The photos have been split into two groups and generally follow the path from the CWT to the cockpit. and then to the Volumetric Shut-Off unit (VSO) and airborne integrated data system (AIDS). The first group the general wire route, and the second group shows the W480 bundle in the reconstruction. D. DETAILS OF THE INVESTIGATION

2 Photo 1. Systems group member sorting wires from the forward electronic center (E/E). Photo 2. Systems Group members in midst of laid-out FQISwires.

3 Photo 3. Attachment points of FQIS wires in CWT on spanwise beam 2. The T347 terminal strip attachment point is at right. Photo 4. Floor of CWT, beneath installed location ofcompensator. (No negative available)

4 Photo 5. Left fuselage landing gear well, with location of DM127 connector on bottom edge, structural repair in midst of wire path, and pressure seals. (No negativeavailable) Photo 6. FQIS bundles from left wing/fuselage pressure seals. (No negative available)

5 Photo 7. Wreckage of pressure refueling panel from left wing. (No negative available) Photo 8. View of repaired potable water compressor mountover left potable water tank with green replacement parts, peeled top-coat of whitel paint (on spar) and red fasteners in repaired area.

6 Photo 9. Structure repairs from bottom of main deck cabin floor. Location is ahead of forward spar. Repairs are to left and right of the airplane centerline, which is marked "BL 0." Left edge of photo is forwa Photo 10. Structure repairs from bottom of main deck cabin floor. Large green item is back side of STA 920 floor beam and visible are black sealant and red fasteners. The part oriented from upper left to lower

7 Photo 11. Sealant with drill shavings at bottom of STA 920 floorbeam. (Digital image) Photo 12. Drill shavings visible in sealant at bottom of STA 920 floorbeam. (Digital image)

8 Photo 13. Face of flight engineer panel. (No negative available) Photo 14. Back of flight engineer panel. (No negative available)

9 Photo 15. Route of bundles along station 360, following path of W350 and W1360 wires from the cockpit to the E/E. Main deck windows are visible from forward right fuselage. Photo 16. Different colors of paint and paint overspray on stringer at station 360, along route of W350 and W1360 bundles.

10 Photo 17. Repair found in frame at station 400 (right), beneath route of W350 and W1360 wire bundles. Photo 18. Detail of pencil and other markings on repair found in frame at station 400 (right), beneath route of W350 and W1360 wire bundles.

11 Photo 19. Interior of VSO avionics unit after removal ofcircuit cards. Card connectors (blue) are in the floor of the box. (No negative available) Photo 20. Typical circuit card from within the VSO. Edge with connector traces was downward in the installed position. (No negative available)

12 Photo 21. Bottom and back of VSO, showing external wiring (cut from E3-1 avionics shelf) and wiring internal to the unit. (No negative available) Photo 22. Wiring attachments at rear of VSO unit. Visible are the exposed conductors in the connector with fewest wires. (No negative available)

13 Photo 23. Debris from within VSO unit included plastic, metal, and sand. (No negative) Photo 24. Darkened areas on circuit cards in lighting control box from rear of cockpit flight engineer station.

14 Photo 25. Sheetmetal repair and hand-written "OCT :42AM". Also visible are different shades of green and white paint. Photo 26. Darkened area on stringer 5 (right), near station 440 frame.

15 Photo 27. Darkened area on station 480 frame that is not visible on W985 wires from area. Photo 28. Wire bundles from over cockpit floor, aft of right emergency exit. No features were found that provided an accurate orientation.

16 Photo 29. Repair found to wiring behind upper deck flight attendant control panel. Photo 30. E11 avionics rack from upper deck; AIDS tray at lower right (marked "DAU-2")

17 Photo 31. AIDS box on E11 avionics rack from upper deck. The features of the adjacent tray and how they align are visible in the scratching near the blue stickers and the puncture that aligns with the (bent) m Photo 32. Second of three AIDS units, as found it tray from the E/E.

18 Photo 33. The least damaged of the three AIDS unit. Photo 34. W480 (& other) bundle pressure seals above left main landing gear well, as viewed downward from cabin the floor removed.

19 Photo 35. W480 (& other) bundles in reconstruction above tank, to about station Pressure seals are visible above left main landing gear well, as viewed downward from cabin. Photo 36. W480 (& other) bundles from forward of CWT, between stations 1030 to forward of bundles from about station Generator cables visible beneath floor level.

20 Photo 37. Forward spar, breach in left side of fuselage at about station 920 (along route of missing W480 wires), and generator cables for engines 1,2 and APU generator. Photo 38. Left side of fuselage at station 920 (wire is missing near opening).

21 Photo 39. W480 (& other) bundles from upper deck at about station (No negative) Photo 40. W480 (& other) bundles from upper deck at about station

22 Photo 41. W480 (& other) bundles from upper deck at about station Photo 42. Detail of separation in W480 (& other) bundles from upper deck at about station 570.

23 Photo 43. W480 (& other) bundles from upper deck at about station Photo 44. W480 (& other) bundles from upper deck at about station

24 Photo 45. W480 (& other) bundles from upper deck at about station Photo 46. W480 (& other) bundles from upper deck at about station

25 Photo 47. W480 wires and pin from connector D1663J. Photo 48. Metal shavings adhered to the STA 940 floorbeam lower cap at LBL 65, typical of shavings from LBL The large round shape is the bucked end of a rivet.