AD 2000-07-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-200B | Airworthiness Directives; Boeing Model 747-200B, -300, -400, -400D, and -400F Series Airplanes |
Unsafe Condition
Cracking of fire extinguisher discharge tubes in certain engine struts, which could reduce the amount of fire extinguishing agent delivered to the engine and potentially result in a fire spreading from the engine to the wing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct repetitive detailed visual inspections to detect cracking of fire extinguisher discharge tubes in certain engine struts. Replace any cracked tube with a new or serviceable tube. For Boeing Model 747-400 series airplanes equipped with Pratt & Whitney PW4000 series engines, perform a modification of the fire extinguisher discharge tubes as terminating action for the repetitive inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747-200B, -300, -400, -400D, and -400F series airplanes equipped with General Electric (GE) CF6-80C2 series engines or Pratt & Whitney PW4000 series engines; line numbers (L/N) 679 through 1061 inclusive; certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.