AD 78-05-08 R3
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | BOEING Model 747 Series Airplanes |
Unsafe Condition
Cool gas generator propellant cartridges manufactured by Olin Corporation may experience excessive swelling and rapid deterioration due to thermal cycling at elevated temperatures, leading to potential failure of the emergency escape slide inflation system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect each propellant cartridge per Boeing Service Bulletin 747-25-2373 and Rocket Research Company SB 25-015. Remove cartridges exceeding specified limits. Conduct initial inspections before 6,000 flight hours or 4 years installed, whichever comes first. Subsequent inspections every year unless using approved temperature indicators. X-ray inspections required if temperature exceeds 100°F. Remove cartridges after 3 years installed post-May 1, 1979. Inspections required after extended parking in hot weather.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance must be accomplished by May 1, 1978, for cartridges exceeding 6,000 flight hours or 4 years installed. Subsequent inspections at intervals not exceeding one year. X-ray inspections required before May 1, 1981, or within one year since installation/service/last inspection if using non-approved temperature indicators. Initial inspections must be done prior to 6,000 flight hours or 4 years installed, whichever is sooner.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing 747 series airplanes with Olin Corporation propellant cartridges in the emergency escape slide inflation system.
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
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