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The Pilots Desk
US-FAA14 CFR 121.1500

SFAR No. 111—Lavatory Oxygen Systems

Read the official rule

This Special Federal Aviation Regulation provided temporary relief for Part 121 operators affected by an airworthiness directive requiring lavatory oxygen system modifications. It allowed airlines to continue operating aircraft with disabled lavatory oxygen systems while complying with AD 2011-04-09.

Under this SFAR, operators could:

  • Fly aircraft and add them to operations specifications with disabled lavatory oxygen
  • Remove oxygen masks from lavatories within 30 days
  • Obtain airworthiness certificates for affected aircraft

Operators had to update crew emergency procedures within 60 days to include visual lavatory checks whenever cabin oxygen masks deployed. Airlines could inform passengers that lavatories lacked supplemental oxygen.

The SFAR expired September 10, 2015, though it continued to apply to aircraft granted AD compliance extensions. This regulation essentially provided a bridge period while the industry addressed safety concerns about lavatory oxygen systems that could potentially fuel fires.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*

This is an original plain-English explanation for training and reference, not legal advice and not for navigation. Always rely on the current official rule linked above. Last reviewed June 20, 2026.