47-10-09: Oil Line Cover Plates
FAA order 47-10-09 is an airworthiness directive. The FAA's subject line: Oil Line Cover Plates. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Lockheed Aircraft Corporation
- Models
- 49-46
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 (551 characters)
47-10-09 LOCKHEED: (Was Mandatory Note 8 of AD-763-3.) Applies to All Model 49 Serials Up to and Including 2088.
Compliance required after each engine change.
When found necessary as a result of engine replacement in a quick-change powerplant unit, add seal plates to the engine oil lines where they pass through the engine fire seals, and add cover plates to the alternate oil line cutouts in the fire seals.
(LAC Service Instruction 49/51-39 and LAC Service Bulletin 49/SB-63 cover this same subject for Models 49-51 and 49-46, respectively.)
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/47-10-09.json · aircraft systems.