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MODUK - DEF STAN 91-101

Lubricating Oil, Gas Turbine Engine, Synthetic Grade 5 cSt NATO Code: O-156 Joint Service Designation: OX-27 and OX-28

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Organization: MODUK
Publication Date: 31 August 2001
Status: active
Page Count: 20
scope:

This Defence Standard specifies the requirements for two grades of synthetic lubricating oils. Those oils which meet the requirements for OX-27 are intended primarily for use in aircraft gas turbine engines and relevant ancillary equipment. Only those oils which also meet the requirements for OX-28 may be used in RN marine gas turbine engines.

Lubricating oil provided to this specification shall possess satisfactory performance and properties when used in appropriate vehicles and/or gas turbines and ancillary equipment operated by the Crown.

Document History

DEF STAN 91-101
August 31, 2001
Lubricating Oil, Gas Turbine Engine, Synthetic Grade 5 cSt NATO Code: O-156 Joint Service Designation: OX-27 and OX-28
This Defence Standard specifies the requirements for two grades of synthetic lubricating oils. Those oils which meet the requirements for OX-27 are intended primarily for use in aircraft gas turbine...
DEF STAN 91-101
August 31, 2001
Lubricating Oil, Gas Turbine Engine, Synthetic Grade 5 cSt NATO Code: O-156 Joint Service Designation: OX-27 and OX-28
This Defence Standard specifies the requirements for two grades of synthetic lubricating oils. Those oils which meet the requirements for OX-27 are intended primarily for use in aircraft gas turbine...
DEF STAN 91-101
December 31, 1997
Lubricating Oil, Gas Turbine Engine, Synthetic Grade 5 cSt NATO Code: 0-156 Joint Service Designation: OX-27 and OX-28
This Defence Standard specifies the requirements for one grade of synthetic lubricating oil intended primarily for use in aircraft gas turbine engines and relevant ancillary equipment. Lubricating...
DEF STAN 91-101
January 1, 1994
Lubricating Oil, Gas Turbine Engine, Synthetic Grade 5 cSt NATO Code: 0-156 Joint Service Designation: OX-27 and OX-28
A description is not available for this item.

References

This document references:
ASTM D2532 - Standard Test Method for Viscosity and Viscosity Change After Standing at Low Temperature of Aircraft Turbine Lubricants
Published by ASTM on May 1, 2017
This test method covers the determination of the kinematic viscosity of aircraft turbine lubricants at low temperature, and the percent change of viscosity after a 3 h and a 72 h standing period at...
This document references:
D892 - Standard Test Method for Foaming Characteristics of Lubricating Oils
October 1, 2023
This test method covers the determination of the foaming characteristics of lubricating oils at 24 °C and 93.5 °C. Means of empirically rating the foaming tendency and the stability of the foam are...
This document references:
ASTM D92 - Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester
Published by ASTM on July 1, 2018
This test method describes the determination of the flash point and fire point of petroleum products by a manual Cleveland open cup apparatus or an automated Cleveland open cup apparatus. NOTE 1—The...
This document references:
FED-STD-791E - TESTING METHOD OF LUBRICANTS, LIQUID FUELS, AND RELATED PRODUCTS
Published by ARMY on June 22, 2021
This test method standard is composed of standard test methods for sampling, inspecting and testing lubricants, liquid fuels and related products. It is issued pursuant to the Federal Property and...
This document is referenced by:
DEF STAN 00-970: PART 0 - Certification Specifications for Airworthiness Part 0: PROCEDURES FOR USE, CONTENT AND DEFINITIONS
Published by MODUK on March 14, 2021
Part 0 provides guidance and content information, together with definitions of terms used throughout this Standard.
This document is referenced by:
DEF STAN 00-970: PART 5 - Certification Specifications for Airworthiness Part 5: LARGE TYPE AIR SYSTEMS
Published by MODUK on March 14, 2021
Where CS 25 makes reference to ‘the Agency’, this should be considered to mean the certifying authority.
This document is referenced by:
DEF STAN 00-970: PT7 SEC1 - Design and Airworthiness Requirements for Service Aircraft Part 7: Rotorcraft Section 1: Introduction
Published by MODUK on July 13, 2015
This Part of the Defence Standard provides requirements for Airworthiness and Design Certification for the design, development and testing of Rotorcraft Aircraft for UK Military operation.
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