54-22-01: Flexible Hose Replacement
FAA order 54-22-01 is an airworthiness directive. The FAA's subject line: Flexible Hose Replacement. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Lockheed Aircraft Corporation
- Models
- 1049-54, 1049B-55 (Navy R7V-1), 1049C-55, 1049D-55, 1049E-55, 49-46, 649-79, 649A-79, 749-79, 749A-79
Dates and paperwork
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (1,282 characters)
54-22-01 LOCKHEED: Applies to Models 49, 649, 749, and 1049 Airplanes as Noted in Referenced Service Bulletins.
Compliance required by April 1, 1955.
A recent engine fire resulted in a premature failure of a flexible hose in the feathering line and in penetration of fire from zone 1 into zone 2.
1. To increase the fire resistance integrity of the propeller feathering line between the pump and the governor, replace the existing flexible hose assemblies meeting current fire resistance requirements. The following Lockheed Service Bulletins cover this subject: No. 49/SB-786 for Model 049 through 749 airplanes and No. 1049/SB-2195 for Model 1049 airplanes. The following hose assemblies may also be considered acceptable for this application:
(a) Aeroquip 680-10S hose assemblies with Aeroquip 304 protective sleeves over end fittings.
(b) Resistoflex - SSFR-3800-10 hose assemblies.
2. To increase the fireproof integrity of the zone 1 fire seal diaphragm against burn-through into zone 2 in the event of a power section fire install steel plates over the lower engine cowling longerons adjacent to the diaphragm. The following Lockheed Service Bulletins cover this subject: No. 49/SB-760 for Model 649/749 airplanes and No. 1049/SB-2115 for Model 1049 airplanes.
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/54-22-01.json · aircraft systems.