What is fail-safe in aircraft?
The FAA’s (2005) accepted definition is as follows: ‘fail safe is the attribute of the structure that permits it to retain its required residual strength for a period of unrepaired use after the failure or partial failure of a principal structural element’.
What is fail-safe condition?
Fail-safe means that a device will not endanger lives or property when it fails. Fail-secure, also called fail-closed, means that access or data will not fall into the wrong hands in a security failure. Sometimes the approaches suggest opposite solutions.
What is the difference between fail-safe and fail secure?
Fail safe products are unlocked when power is removed. Power is applied to lock the door. Fail secure products are locked when power is removed. Power is applied to unlock the door.
What is fail safe analysis?
The minimum number of undetected negative studies that would be needed to change the conclusions of a meta-analysis.
How do you pronounce Plan B?
“Highly agitated by the display before her Felicia fled to the house and began to strategize her plan B for winning back her former husband.”…What is another word for plan B?
| fallback | contingency |
|---|---|
| stand-in | alternative |
| backup | backup plan |
| substitute | cover |
| relief | sub |
Are mag locks fail-safe?
Maglocks require constant power to stay locked, making them fail-safe. That could lead to an unsecured opening in the event of a power outage. They should be used on doors where entry security is a concern since they will remain locked during a power outage.
What is a fail safe number?
The failsafe number is the number of missing studies averaging a z-value of zero that should be added to make the combined effect size statistically insignificant (see Figure 26 for an example).
Is there such a thing as a fail safe design?
Fail-safe design was essentially an extension of the safe-life concept (it continues to be used today, but it is not a stand-alone design methodology in the USAF and in FAA Part 25 regulations for commercial transports). In these regulatory environments, fail-safe designs still need to meet damage tolerance requirements.
What is the FAA definition of Fail Safe?
The FAA’s (2005) accepted definition is as follows: ‘fail safe is the attribute of the structure that permits it to retain its required residual strength for a period of unrepaired use after the failure or partial failure of a principal structural element’.
What’s the difference between a fail safe and a fail essential?
Fail-safe does not necessarily imply that the system will continue operating after a fail. If the system stops operating but does not create a dangerous situation, it is still fail-safe. A non-essential service on board an aircraft such as the entertainment system can be fail-safe if it just stops operating because a fuse blows.
Is the F-4 Phantom a fail safe aircraft?
This failure scenario has occurred in Air Force fighter aircraft as well, highlighted by the 1973 loss of an F-4 Phantom II due to fracture of its ‘fail-safe’ wing structure. This crash made it painfully clear that structure could not be truly ‘fail-safe’ without inspection ( Lincoln, 1985 ).