ARP5107C Guidelines for Time-Limited-Dispatch (TLD) Analysis for Electronic Engine Control Systems

Revised

09/04/2018

Features
Issuing Committee
Scope
Content
This SAE Aerospace Recommended Practice (ARP) provides methodologies and approaches which have been used for conducting and documenting the analyses associated with the application of Time Limited Dispatch (TLD) to the thrust control reliability of Full Authority Digital Engine Control (FADEC) systems. The TLD concept is one wherein a fault-tolerant system is allowed to operate for a predetermined length of time with faults present in the redundant elements of the system, before repairs are required. This document includes the background of the development of TLD, the structure of TLD that was developed and implemented on present generation commercial transports, and the analysis methods used to validate the application of TLD on present day FADEC equipped aircraft. Although this document is specific to TLD analyses (for FADEC systems) of the loss of thrust control, the techniques and processes discussed in this document are considered applicable to other FADEC system failure effects or other systems, such as: thrust reverser, and propeller control systems, and overspeed protection systems.
Meta TagsDetails
DOI
https://doi.org/10.4271/ARP5107C
Pages
76
Citation
SAE International Recommended Practice, Guidelines for Time-Limited-Dispatch (TLD) Analysis for Electronic Engine Control Systems, SAE Standard ARP5107C, Revised September 2018, Issued June 1997, https://doi.org/10.4271/ARP5107C.
Additional Details
Publisher
Published
Sep 4, 2018
Product Code
ARP5107C
Content Type
Recommended Practice
Status
Revised
Language
English

Revisions