Originally Posted by Mewcasa
Dry nitrogen servicing is required on aircraft tires for the following reasons...
1. It's dry!
2. Nitrogen does NOT support combustion!
3. Required by aircraft manufacture's Approved (FAA, EASA, etc.) Technical Publications!
For auto/truck/trailer use... what a scam!
Correct. However the primary reason the FAA issued Airworthiness Directive 87-08-09 (AD) on 06-01-1987 was to prevent aircraft wheels on Large Transport Category Aircraft such as Boeings,etc. from catching fire in the event of over-heating,etc. Large aircraft wheels contain large amounts of magnesium which we know supports fire and is difficult to extinguish.
The AD applies to aircraft in use on the effective date of 06-01-1987.
The FAA also amended 14 CFR 25.733 (e) (Tires) which governs the certification of Large Transport Aircraft that all such aircraft be equipped with nitrogen filled tires on and after 02-1993.
There have some references to nitrogen use in aircraft tires ( some by me) that overlook the primary reason for the FAA issuing the AD.
One other thing - nitrogen is only required on Civil Large Catergory Aircraft. Those are defined by the FAA as those aircraft having a certificated takeoff weight of 75,000 lbs or more.