1 / 4

Flammability Reduction Compliance Status

Flammability Reduction Compliance Status. Fuel Tank Flammability. Design Approval Holders-. Flammability assessments completed by all DAH (EMB, Fokker, Bombardier, ATR, Shorts, Airbus, Boeing). No additional fuel tanks identified as exceeding the high flammability limit.

mpeggy
Download Presentation

Flammability Reduction Compliance Status

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. Flammability Reduction Compliance Status Fuel Tank Flammability

  2. Design Approval Holders- • Flammability assessments completed by all DAH (EMB, Fokker, Bombardier, ATR, Shorts, Airbus, Boeing). • No additional fuel tanks identified as exceeding the high flammability limit. • Retrofit: Boeing and Airbus completed all flammability assessments, compliance planning, design development. Service instructions expected to be submitted to FAA by December 26, 2010 date. • Production Incorporation on 777 and 737. Three A320 airplanes delivered to date in US with system installed. Conducting in- service evaluation. • Over 800 737NG and 50 777 delivered worldwide to date with nitrogen inerting systems. Reliability has exceeded predictions. • 787 and A350 have active inerting systems for all fuel.

  3. Deviation/Equivalent Level of Safety Policy • FAA required standardized airplane descent rate to be used in assessing fuel tank flammability using Monte Carlo Model. • Descent rate strongly influences sizing of inerting systems • intake of outside air into fuel tanks because of pressure change • reduced production of nitrogen when engine set to idle and available engine bleeds lowered. • Boeing requested an Equivalent Level of Safety (ELOS) Finding using a descent rate that more accurately represented in service operations.

  4. Descent Rate ELOS • FAA agreed to ELOS but required Boeing to: • monitor in service descent rates and report every 3 years to FAA. • Develop service instructions to maintain flammability within certified limits if the fleet flammability approaches the limit. • Future changes to the air traffic system currently being implemented are envisioned to result in more rapid descent rates and therefore the possibility of increased fleet average fuel tank flammability. • Include a Design Configuration Control Limitation that requires operators to incorporate any changes needed to maintain the flammability within limits.

More Related