The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · amended

SE128NE

Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. Held by Ams/Oil. Last revised May 15, 1983. System: engine.

What it applies to

Kind of product
Engine
Design holder
Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation
Models
IVO-360-A1A, VO-360 Series, HIO-360 Series, LIO-360-C1E6, IO-360 Series, AIO-360 Series, LHIO-360 Series, AEIO-360 Series, IGO-540 Series, AIO Series, LIO-320 Series, IO-320 Series, AIO-320 Series, AEIO-320 Series, TVO-435 Series, TVO-540 Series, TIVO-540 Series, IO-720 Series, IO-540 Series, AEIO-540 Series, HIO-540 Series, IGSO-540 Series, R-680 Series, O-233-A1, O-235 Series, GO-435 Series, O-290 Series, GSO-580 Series, O-320 Series, IGO-480 Series, GO-480 Series, GSO-435 Series, O-340 Series, VO-435 Series, O-435 Series, GSO-480 Series, IGSO-480 Series, SO-580-A1B, SO-580-A1A, SO-580,...
Type certificates
1E1, 1E1, 1E10, 1E10, 1E10, 1E10, 1E10, 1E10, 1E11, 1E12, 1E12, 1E12, 1E12, 1E12, 1E13, 1E14, 1E14, 1E15, 1E4, 1E4, 1E4, 1E7, E-202, E-223, E-223, E-228, E-229, E-256, E-274, E-275, E-275, E-276, E-277, E-279, E-279, E-284, E-284, E-285, E-285, E-285, E-285, E-286, E-286, E-286, E-295, E-304, E10EA, E14EA, E14EA, E16EA, E19EA, E19EA, E19EA, E19EA, E19EA, E19EA, E26EA, E26EA
The FAA's record
On the FAA's site

What an approved modification is

A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.

Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 7, 2026.