AD 55-15-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aero Spacelines, Incorporated | 377 | BOEING 377 Series Aircraft |
| aircraft | Aero Spacelines, Incorporated | 377MG | BOEING 377 Series Aircraft |
| aircraft | Aero Spacelines, Incorporated | 377SGT | BOEING 377 Series Aircraft |
Unsafe Condition
Flexible hose components of propeller feathering lines forward of the firewall in zone 2 may fail due to insufficient fire resistance, increasing the risk of system damage from a powerplant fire.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace all flexible hose components of propeller feathering lines forward of the firewall in zone 2 with lines and fittings meeting current fire resistance requirements, using acceptable hose assemblies such as Aeroquip 680-10S with protective sleeves, Resistoflex SSFR-3800-10, or Aeroquip 309009-10S.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
by first scheduled engine change after November 1, 1955, but not later than November 1, 1956
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Aero Spacelines, Incorporated models 377, 377MG, 377SGT with Hamilton Standard Propellers
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.