AD 92-18-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
Unsafe Condition
Loss of main landing gear braking effectiveness due to excessive brake wear beyond specified limits for specific brake part numbers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate specified maximum brake wear limits into maintenance programs; inspect brakes for wear exceeding limits, replace worn brakes prior to further flight with specified parts built per Bendix service bulletins; update AFM with new brake part numbers and categories, and prohibit intermixing beyond 360 days after AD effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 180 days after November 12, 1991 (for paragraph (a)) and within 180 days after November 17, 1992 (for paragraph (b)), with some actions required prior to further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747 series airplanes equipped with specified brake part numbers (Bendix and BFGoodrich P/Ns listed in the AD).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.