I've watched how a lot of the MIL specs I was familiar with become SAE specs. It's good someone is maintaining them. Has anything come along to serve the role of the Qualified Product Listings the military used to produce?
My posts reflect my personal views and are not in any way endorsed or...
One of my coworkers told me that when he was a younger guy he was assigned to a work detail to build up a couple J58 engines for the SR 71 program. He said, he was told back then that you could see the turbine through the engine case when it ran in the test cell and that he was amazed when he...
I work in an airline Engineering Support Group that supports the aircraft maintenance division. One of our chronic problems involves troubleshooting the electrical system on older 3 engine aircraft. When an aircraft has an odd number of engine driven generators or just a lot of them (as in...
Looking for a group oriented around post retirement topics. Specifically looking for an Excel model to predict income & taxes with SS and 401k.
My posts reflect my personal views and are not in any way endorsed or approved by any organization I'm professionally affiliated with.
I'm looking for information on electrical wire splices in high vibration environments (aircraft wings, engine pylons, and engines).
Sometimes wire splice repairs are an operational necessity. Some OEMs consider all wire splice repairs “temporary.” I’ve seen very conservative hard limits on...
Hi All,
I primarily work in line operation Engineering support. I want to better understand the design concepts used in the design of power generation and management on large transport category aircraft.
The OEMs gives us plenty of repair into, it's the troubleshooting when fault messages...
All,
It seems like more and more, every repair we do on an aircraft coaxial cable ties us to a specific vendor P/N for the installation. I'm looking for guidance that will allow me to identify equivalent components and make substitutions. There are usually not that many variables to account...
All,
I figured I'd ask if anyone knows of a good cookbook reference for quantifying the impact damage to a pitot tube has on the accuracy, for slow speed (under 150 kts) aircraft.
This is a personal investigation. I have googled this, and found a lot of selection guides and design data...
Been wrestling with issues related to CG Control systems on large commercial aircraft.
I'm very familiar with basic aircraft weight and balance as typically limited to General Aviation, but this is several magnitudes more complicated. Large airliners are typically equipped with systems that...
All,
I'm trying to understand typical voltage stability, noise and "spike voltage" characteristics typically found on GA aircraft 14V and 28V engine driven rectified alternator power systems.
Maybe the characteristics of an old 1940s automobile would do?
I'm looking into suitability of...
I heard about this at an FAA seminar last week. The speaker didn't know who ASTM was, but he mentioned the the FAA had adopted a number of commercial ASTM standards to support the Experimental Aircraft community.
I also heard something about this on the Grumman Gang list server too. I saw where...
Anyone know of any published material on using electrostatic testers on aircraft? I'm interested in troubleshooting P static. I's like to see what's been done with quantitative measurements. Every unbonded surface isn't a necessarily a source of noise either (like window plugs).
Thanks...
Anyone aware of any published guidance on using meggers (MegOhm Meters) to check aircraft wiring insulation (and connectors) on aircraft wiring?
My posts reflect my personal views and are not in any way endorsed or approved by any organization I'm professionally affiliated with.
All,
Ref subject, we were looking at replacing the wire to a flap position RVDT circuit.
OEM used one twisted shielded pair for RVDT excitation. This RVDT sensor has two secondary circuits, the 4 wires from the RVDT secondary were in a 4 conductor shielded run. Excitation is 28V, 400Hz...
All,
Anybody know of a good design reference for subject topic. I'm trying to bring myself up to speed on the principles after an incident on an older airplane. I'm not seeing what I need in the aircraft maintenence guidance.
Thanks
In theory, there is no difference between theory and...
Anybody know what requirements drive the implementation of a landing gear lever OFF position in large aircraft?
This is a curiosity question, we've been dealing with some inflight gear issues this week; the question keeps coming up. It's been on every large aircraft I've supported, I'm not...
I'm looking for and circuit breaker protection for aircraft power distribution systems. Anyone know where I should be looking?
In theory, there is no difference between theory and practice however, experience suggests that in practice, there is!
My posts reflect my personal views and are...
Lately I've been getting calls related to 757 Air Data Computer pin programming changes we've been making to accomodate ops in UK airspace. Apparently, UK has different rules than FAA for MMO/VMO settings.
Anybody, got any background on what drives the differences and why. Aren't these...
Does anyone know of any guidelines for determining when a failure or pattern of failures is a serious flight safety issue?
Typically, when damage is discovered on an aircraft, actions are taken to repair or defer the item. Sometimes, there are repeat events.
I think that too often, if an...
Looking for substantiation to replace a hollow tube antenna reflector element with one made from solid round stock. My background with these models in rusty to non-existent. Anybody know of good reference to come up to speed quickly. These antennas are mounted on NLG, Ground personnel are...
