48-38-01: Oil Cooler Installation

FAA order 48-38-01 is an airworthiness directive in force since December 1, 1948. The FAA's subject line: Oil Cooler Installation. It names Aeronca S15: about 13 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: other and general.

What it applies to as the FAA lists it

Kind of product: Aircraft
Makes: Rogers, Burl A.
Models: 15AC, S15AC
On this site: Aeronca S15 13 registered

Dates and paperwork

In force since: December 1, 1948
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 (1,018 characters)

48-38-01  AERONCA:  Applies to Serial Numbers 15AC-1 to 15AC-227 Inclusive, or S15AC-1 to S15AC-227 Inclusive. 

	Compliance required before operation at temperatures below freezing, but in any case not later than December 1, 1948. 

	To prevent the possible loss of engine oil pressure and subsequent engine damage during cold weather starting, the present oil cooler installed on the suction side of the engine oil pump must be revised and installed on the pressure side of the pump. 

	This change involves the following: 

	1.	Installation of an oil cooler adapter assembly, Continental Motors Corp. Drawing 530536 and 530697, replacing pressure oil screen.  This pressure oil screen is then used in adapter assembly. 

	2.	Install new suction oil screen, Continental Motors Corp. P/N A20878. 

	3.	Replace present oil cooler bypass spring with a 35 p.s.i. spring. 

	4.	Replumb oil cooler with different fittings and line arrangement. 

	(Aeronca Service Helps and Hints Bulletin No. 35 covers this same subject.)

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 October 5, 2026. Connections as data: /graph/directive/48-38-01.json · aircraft systems.