1 / 11

American Airlines Flight 1400 St. Louis, Missouri

This report highlights the findings of the investigation into the fire incident on American Airlines Flight 1400, which occurred in St. Louis, Missouri. The fire was confined to the left nacelle cavity, with no engine core problems identified. The ignition source was determined to be a start system failure, specifically the air turbine start valve (ATSV) and air turbine starter (ATS). Further details and recommendations are provided.

jswenson
Download Presentation

American Airlines Flight 1400 St. Louis, Missouri

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. American Airlines Flight 1400St. Louis, Missouri Harald Reichel Powerplants

  2. Left Nacelle Findings • Significant fire occurred • Fire confined to nacelle cavity • No engine core problems • Combustible fluid source could not be determined • The ignition source of the fire was the start system failure

  3. Pneumatic supply line ATSV air filter Air turbine start valve (ATSV) Air turbine starter (ATS) Engine Start System Overview

  4. Air Turbine Starter Findings Does not normally operate during flight Uncommanded operation during takeoff and climb Failed, acting as ignition source Event air turbine starter

  5. ATSV Air Filter Findings Filter element Filter element missing End cap Fitting End cap Loose end cap Air flow AA1400 ATSV air filter New ATSV air filter

  6. Air Turbine Start Valve- Normal Operation Solenoid Cut-away Illustrating butterfly valve Ball Valve Armature Pin Piston To Air Turbine Starter Manual O/R Button To Air Turbine Starter

  7. Cap blocks air flow Solenoid operates No air flow No air flow Manual O/R button AA1400 Event No-Start History

  8. Ball valve Manual override pin bent Manual Override Pin and Ball Valve

  9. Cap vibrates and allows air flow Ball valve partially open Pin bent AA1400 Event Takeoff and Climb

  10. Summary Disintegrated ATSV-air filter caused intermittent no-starts ATSV manual override pin was found bent Bent pin caused uncommanded ATS activation at takeoff Catastrophic failure of the ATS ignited combustible fluid present in the nacelle

More Related