Search found 8310 matches

by fr8mech
Tue Aug 24, 2021 6:24 pm
Forum: Technical/Operations
Topic: "Silver dollar patch"?? MD-95 /Boeing 717
Replies: 5
Views: 1210

Re: "Silver dollar patch"?? MD-95 /Boeing 717

SteelChair wrote:
I believe it a slang term for a standard repair that every A and P learns on A&P school (US FAA). Reference AC 43.13 for details.


Hadn’t heard it called that before, but I knew what it was the moment I read the post.

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by fr8mech
Tue Aug 24, 2021 2:56 pm
Forum: Technical/Operations
Topic: Absence of large manual pitch trim wheels on non-Boeing jetliners.
Replies: 9
Views: 1562

Re: Absence of large manual pitch trim wheels on non-Boeing jetliners.

thanks fr8mech. Is runaway trim possible on non-Boeing aircraft? It seems like on Boeing aircraft, Boeing commercial aircraft, that you have to grab a spinning wheel and that there is a lot of cranking involved in trimming manually. Maybe I am wrong. How about other aircraft? Runaway trim is possib...

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by fr8mech
Tue Aug 24, 2021 3:54 am
Forum: Non-Aviation
Topic: I just gave blood (again) and it was (still) painless.
Replies: 28
Views: 1336

Re: I just gave blood (again) and it was (still) painless.

Got my appointment for double-reds next Monday. It’s right before lunch, after which I will stumble…kidding…next door and have some Shrimp Pho…extra spicy.

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by fr8mech
Tue Aug 24, 2021 3:49 am
Forum: Technical/Operations
Topic: Absence of large manual pitch trim wheels on non-Boeing jetliners.
Replies: 9
Views: 1562

Re: Absence of large manual pitch trim wheels on non-Boeing jetliners.

So, if you look to the left of the spoiler handle of the MD11, you’ll find 2 black and white striped handles. These are commonly referred to as the suitcase handles. Push forward, nose down…pull aft, nose up. The early Douglas aircraft have them also. So do the MD8X aircraft, near as I can tell Forg...

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by fr8mech
Mon Aug 23, 2021 12:51 am
Forum: Technical/Operations
Topic: Does the DC-10 nose gear strut not meet the ground at a 90 degree angle?
Replies: 13
Views: 2013

Re: Does the DC-10 nose gear strut not meet the ground at a 90 degree angle?

battlegroup62 wrote:

And changing wheels without a jack. Not that anyone would ever use disobey an AMM.


I may have witnessed that once or twice…quite possibly thrice on a DC-8.

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by fr8mech
Sat Aug 21, 2021 8:58 pm
Forum: Technical/Operations
Topic: Does the DC-10 nose gear strut not meet the ground at a 90 degree angle?
Replies: 13
Views: 2013

Re: Does the DC-10 nose gear strut not meet the ground at a 90 degree angle?

It is canted forward, as is just about every other Douglas aircraft I can think of.

I can’t recall why Douglas chose to do it that way.

Fun fact…the center gear on the MD11 is also canted.

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by fr8mech
Sat Aug 21, 2021 6:44 pm
Forum: Technical/Operations
Topic: Why do FAs collect trash 30 seconds after service ends?
Replies: 5
Views: 1335

Re: Why do FAs collect trash 30 seconds after service ends?

I’ve never been a flight attendant nor got a look at their training, but I suspect they do it because they have the opportunity to. The faster they get those loose, unrestrained items out from in front of people, the better. From a security point of view, it keeps them moving around the cabin. Reduc...

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by fr8mech
Wed Aug 18, 2021 8:42 pm
Forum: Non-Aviation
Topic: The Body, The Mind & Exercise
Replies: 21
Views: 1327

Re: The Body, The Mind & Exercise

Your ligaments or cartilage may have issues. It could also be.........arthritis.... Might be worth having a discussion with a MD. Actually, I’ve got something going on with my hand, so we had that x-ray’ed and I was screened for rheumatoid arthritis. All negative, which is good news, but still don’...

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by fr8mech
Wed Aug 18, 2021 5:20 pm
Forum: Non-Aviation
Topic: The Body, The Mind & Exercise
Replies: 21
Views: 1327

Re: The Body, The Mind & Exercise

Oh, I’m sure age has something to do with it, but I find it strange that these issues disappear as I continue my exercise and don’t come back again until I’m set to workout again. Plus, some of these things, the ankle and left knee, I’ve never experienced before. I understand my endurance and streng...

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by fr8mech
Wed Aug 18, 2021 4:57 pm
Forum: Technical/Operations
Topic: Main Wheel Tire Shoulder wear - but on one side only
Replies: 10
Views: 1460

Re: Main Wheel Tire Shoulder wear - but on one side only

If it's edge wear, on one side of the tire (the "shoulder" tread if you will), I'm thinking it's a torque-link shimming problem. This would put the tire out of alignment making it wear with an uneven pattern. An imbalance will usually result in a shimmy of some sort. Assuming that it’s at...

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by fr8mech
Wed Aug 18, 2021 2:51 am
Forum: Non-Aviation
Topic: The Body, The Mind & Exercise
Replies: 21
Views: 1327

The Body, The Mind & Exercise

After 4'ish years of illness, injury, apathy, imagined time-constraints, etc. I've decided to run & workout again. My weight has slowly crept up, though nowhere near the all-time high, it is higher than I'd like. But, it's more than the weight, I just feel better when I'm active. So, a couple of...

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by fr8mech
Tue Aug 17, 2021 10:06 pm
Forum: Technical/Operations
Topic: Main Wheel Tire Shoulder wear - but on one side only
Replies: 10
Views: 1460

Re: Main Wheel Tire Shoulder wear - but on one side only

Hawk, more info needed.

Is it one position on a specific aircraft?
One position on all aircraft?

Or, just a general question on tire wear?

And, is it really shoulder wear, or is it edge wear?

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by fr8mech
Tue Aug 17, 2021 2:29 am
Forum: Technical/Operations
Topic: Aircraft Wheel Alignment
Replies: 4
Views: 791

Re: Aircraft Wheel Alignment

I read somewhere that after one landing the balance/alignment would be out so no point really. I’ve built up exactly 3 wheel assemblies in my 34 years in maintenance. Two B727-2xx mains and one B757 nose, and that was 33 years ago. We did balance them, but it was crude. There is a dot near the bead...

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by fr8mech
Mon Aug 16, 2021 7:26 pm
Forum: Technical/Operations
Topic: Aircraft Wheel Alignment
Replies: 4
Views: 791

Re: Aircraft Wheel Alignment

No, not on the big jets. The only thing that is rigged is the steering system, and the wheel assemblies* have nothing to do with that. That’s all in the cabling and the valve. *there is a possibility that a pair of nose tires that are a mismatch in wear…a new tire paired with an old, almost worn to ...

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by fr8mech
Sun Aug 15, 2021 7:23 pm
Forum: Technical/Operations
Topic: Can turbulence cause damage to old Kapton insulated wire?
Replies: 9
Views: 1245

Re: Can turbulence cause damage to old Kapton insulated wire?

I wonder if Kapton insulted wiring played any part in the loss of TWA Flight 800. Not sure what kind of wiring was used in the wing tanks of those older Boeing 747's. Not even absolutely certain what really caused the crash of TWA Flight 800. https://www.ntsb.gov/investigations/AccidentReports/Repo...

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by fr8mech
Sun Aug 15, 2021 2:38 pm
Forum: Technical/Operations
Topic: A320 Wingtip strobes
Replies: 19
Views: 2434

Re: A320 Wingtip strobes

Never understood why this is a concern, our policy was all exterior lights on when on the runway and strobe lights on when cleared for take off for maximum visibility and other traffic’s awareness There’s a minority opinion that activating the wingtip strobes on the ground will ‘blind’ other pilots...

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by fr8mech
Sat Aug 14, 2021 8:35 pm
Forum: Non-Aviation
Topic: Minneapolis police to curb minor traffic stops
Replies: 43
Views: 2574

Re: Minneapolis police to curb minor traffic stops

Aesma wrote:
What's the point of tags expiring again ? Here they last the life of the car. In Switzerland they go from car to car.


It’s all about taxes and fees. The tags or plates themselves don’t expire, the registration tied to them expires.

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by fr8mech
Sat Aug 14, 2021 6:36 pm
Forum: Non-Aviation
Topic: Minneapolis police to curb minor traffic stops
Replies: 43
Views: 2574

Re: Minneapolis police to curb minor traffic stops

I understand why some of these offenses are in place, and why some are primary traffic violations. But, as a Libertarian leaning Conservative, I believe that if a law won’t be enforced, can’t be enforced or shouldn’t be enforced, it should not be a law. Bust these types of violations to secondary st...

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by fr8mech
Sat Aug 14, 2021 6:40 am
Forum: Technical/Operations
Topic: Can turbulence cause damage to old Kapton insulated wire?
Replies: 9
Views: 1245

Re: Can turbulence cause damage to old Kapton insulated wire?

Normal aircraft vibrations can cause damage to any wire. Wire will rub against other wires, clamps, lacing or structure. Properly bundled, laced, routed and clamped wire harnesses will reduce this type of damage. Turbulence while not uncommon, really wouldn't cause the damage we typically see on wir...

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by fr8mech
Mon Aug 09, 2021 3:23 pm
Forum: Non-Aviation
Topic: Death of a smoke detector
Replies: 22
Views: 1615

Re: Death of a smoke detector

Dieuwer wrote:
Why would a smoke detector beep if there is no battery in it?


End of life.

It is recommended that they are replaced every 10 years due to degradation of the sensing elements.

Plus, First Alert, et al., want to keep selling smoke detectors.

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by fr8mech
Sun Aug 08, 2021 11:06 pm
Forum: Non-Aviation
Topic: Death of a smoke detector
Replies: 22
Views: 1615

Re: Death of a smoke detector

FYI, if my smoke detector(s) activate, the fire department will respond and even as the homeowner I’m not permitted to cancel the call There’s been many cases where people think they’ve put the fire out and they really haven’t We would continue a commander and an engine to any fire alarm where ther...

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by fr8mech
Sun Aug 08, 2021 11:23 am
Forum: Non-Aviation
Topic: Death of a smoke detector
Replies: 22
Views: 1615

Re: Death of a smoke detector

That is if you don't have hardwired alarms. Hardwired interconnected alarms are still required in new construction, but typically most cities 10-year battery laws only apply to battery-only alarms, even though there are hardwired alarms with 10-year backup batteries available. Smoke detectors shoul...

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by fr8mech
Sat Aug 07, 2021 10:22 am
Forum: Site Related
Topic: Deleted Topic
Replies: 20
Views: 1372

Re: Deleted Topic

Have we really devolved to the point where we can’t even use wildcards in the place of those nasty words? And, only in one instance. This site used to be a place where we could have discussions and the occasional use of a swear word, where appropriate was not censored. I guess the old A-Net is truly...

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by fr8mech
Fri Aug 06, 2021 9:35 pm
Forum: Non-Aviation
Topic: "Stand Your Ground" Test in Miami: Attempted ATM Robbery
Replies: 61
Views: 7924

Re: "Stand Your Ground" Test in Miami: Attempted ATM Robbery

What the driver was thinking is irrelevant. If prosecutors had to prove the thoughts of a perpetrator accused of a crime, our legal system would collapse. A prosecutor would only have to demonstrate that a reasonable person would have known that the assailant was still alive when the driver unloade...

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by fr8mech
Fri Aug 06, 2021 7:23 pm
Forum: Technical/Operations
Topic: Can severe turbulence damage avionics in the E&E bay?
Replies: 12
Views: 1717

Re: Can severe turbulence damage avionics in the E&E bay?

Which duct? There are so many ducts around that area.... and on older 767 the amount of tape repair on the ducts are just beyond belief..... Flight deck conditioned air. When I get back to work next week, I’ll see if I can dig up its actual nomenclature and the station number where the separation o...

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by fr8mech
Fri Aug 06, 2021 7:15 pm
Forum: Technical/Operations
Topic: Boeing 707 non-standard second roof antenna
Replies: 13
Views: 1957

Re: Boeing 707 non-standard second roof antenna

flyer408 wrote:
Thank you very much for the explanation. I understand that this antenna could as well be fitted at the bottom of the fuselage?


Yes, you frequently see them on the bottom.

In fact, in both pictures you posted, there are VHF antennas below the R1 door.

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by fr8mech
Fri Aug 06, 2021 6:42 pm
Forum: Site Related
Topic: Deleted Topic
Replies: 20
Views: 1372

Deleted Topic

It appears my Topic titled “I’m still ambivalent on the use of masks” has been deleted.

Can I at least know why?

It seemed to me that we were having a decent discussion that was devoid of the normal descent into political idiocy.

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by fr8mech
Fri Aug 06, 2021 6:38 pm
Forum: Non-Aviation
Topic: "Stand Your Ground" Test in Miami: Attempted ATM Robbery
Replies: 61
Views: 7924

Re: "Stand Your Ground" Test in Miami: Attempted ATM Robbery

But from a logical perspective, if you don't know that someone is dead, and you decide to shoot that person multiple times, I think we can draw a reasonable conclusion that you are trying to make sure that person is dead. If you thought the guy was alive, then you are clearly trying to kill him. If...

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by fr8mech
Fri Aug 06, 2021 6:29 pm
Forum: Technical/Operations
Topic: Boeing 707 non-standard second roof antenna
Replies: 13
Views: 1957

Re: Boeing 707 non-standard second roof antenna

Could analog television stations be received onboard a private aircraft with one of these antennas? If I remember my schooling, the VHF TV band was pretty low on the VHF spectrum. So, maybe? I do know that if the control heads could tune to the FM radio band, you’d be able to listen to that, but th...

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by fr8mech
Fri Aug 06, 2021 4:57 pm
Forum: Non-Aviation
Topic: "Stand Your Ground" Test in Miami: Attempted ATM Robbery
Replies: 61
Views: 7924

Re: "Stand Your Ground" Test in Miami: Attempted ATM Robbery

Ok, you’re the prosecutor. Prove that the driver did not know the guy was dead. That seems fairly simple. Did he get out of the car and check for vitals? If not, then he doesn't know the guy is dead. And, he doesn’t know if he’s alive either…Schrodinger’s body? You know, after I made that statement...

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by fr8mech
Fri Aug 06, 2021 12:31 pm
Forum: Technical/Operations
Topic: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?
Replies: 58
Views: 9331

Re: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?

Airlines have a technical support department that develops plans to work a repetitive problem. I guess I should add that, broadly, there are two types of repetitive items…those that affect one aircraft and those that affect the aircraft type or sub-fleet of that type. The first can usually be dealt...

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by fr8mech
Fri Aug 06, 2021 12:20 pm
Forum: Technical/Operations
Topic: Huge rush of cabin air when the DC-10 decelerated?
Replies: 5
Views: 1336

Re: Huge rush of cabin air when the DC-10 decelerated?

Can a pressure switch with a valve device, or pressure control system that can control pneumatic pressure and prevent airflow noise? These things are already installed in the systems. If what is being felt/heard is that transition to the HPC, we’re just talking about a lag between the current suppl...

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by fr8mech
Fri Aug 06, 2021 10:33 am
Forum: Technical/Operations
Topic: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?
Replies: 58
Views: 9331

Re: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?

Dear all, This is a highly interesting read even though I am not an aviation professional. One side question arises: What happens if you are doing maintenance on a big jet and you happen to get "stuck" - like a system not behaving as expected, or a maintenance manual that gives unclear in...

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by fr8mech
Thu Aug 05, 2021 10:19 pm
Forum: Technical/Operations
Topic: Huge rush of cabin air when the DC-10 decelerated?
Replies: 5
Views: 1336

Re: Huge rush of cabin air when the DC-10 decelerated?

Change in pneumatic pressure is a probable cause. When the engines are pulled back to flight idle, the high stage valves open to supply the needed air to maintain the cabin. What you’re feeling/hearing is probably just the increase in pressure until the pack flow valves catch-up. I could be wrong…ne...

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by fr8mech
Thu Aug 05, 2021 5:17 pm
Forum: Technical/Operations
Topic: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?
Replies: 58
Views: 9331

Re: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?

And if there's a black box you open the manual and can follow exactly what's happening inside. The LAMM is a sweet manual. About the only thing good about the aircraft. Every wonder why the LAMM is needed? Because the AMM, the FIM and the WDM are just about useless for telling you what’s happening....

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by fr8mech
Thu Aug 05, 2021 1:05 pm
Forum: Non-Aviation
Topic: "Stand Your Ground" Test in Miami: Attempted ATM Robbery
Replies: 61
Views: 7924

Re: "Stand Your Ground" Test in Miami: Attempted ATM Robbery

In the video when he unloaded 10 rounds into the kid you see his legs move, would they move if he was already dead? The bullets impacting into the body impart kinetic energy which needs to be dissipated. I’m not surprised the extremities move. One of the great fallacies of TV cop shows: getting sho...

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by fr8mech
Wed Aug 04, 2021 10:35 pm
Forum: Non-Aviation
Topic: "Stand Your Ground" Test in Miami: Attempted ATM Robbery
Replies: 61
Views: 7924

Re: "Stand Your Ground" Test in Miami: Attempted ATM Robbery

"Stand your ground" is only an issue where the perpetrator has taken a retreating or disabled position and you continue to try and kill them. Totally different. That isn't "stand your ground". Stand your ground concerns staying and fighting when you have an escape route. That is...

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by fr8mech
Wed Aug 04, 2021 8:21 pm
Forum: Non-Aviation
Topic: "Stand Your Ground" Test in Miami: Attempted ATM Robbery
Replies: 61
Views: 7924

Re: "Stand Your Ground" Test in Miami: Attempted ATM Robbery

You can't have "attempted murder" for someone who is already dead. If you do not know if the other guy’s death, then surely it is attempted murder? It’s about the attempt, not the result. You want to murder someone and you fail, so it is attempted murder. Whether you failed because of a j...

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by fr8mech
Wed Aug 04, 2021 2:06 pm
Forum: Non-Aviation
Topic: "Stand Your Ground" Test in Miami: Attempted ATM Robbery
Replies: 61
Views: 7924

Re: "Stand Your Ground" Test in Miami: Attempted ATM Robbery

Why didn’t he just floor it the moment they started shooting ? Would have avoided the entire problem Just out of curiosity, the story says 3 assailants. Does anyone see the third? Is he maybe in front of the car, barring the way? I know if I was planning this kind of crime, I would have someone in ...

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by fr8mech
Wed Aug 04, 2021 1:56 pm
Forum: Non-Aviation
Topic: "Stand Your Ground" Test in Miami: Attempted ATM Robbery
Replies: 61
Views: 7924

Re: "Stand Your Ground" Test in Miami: Attempted ATM Robbery

He came with the intention to kill and shot bullets that would probably kill someone alive => can't it be at least attempted murder ? Did he? Maybe he returned to make the 911 call more compatible with his narrative. Maybe, when he returned while relating the events on the phone, he had some kind o...

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by fr8mech
Wed Aug 04, 2021 1:14 pm
Forum: Non-Aviation
Topic: "Stand Your Ground" Test in Miami: Attempted ATM Robbery
Replies: 61
Views: 7924

Re: "Stand Your Ground" Test in Miami: Attempted ATM Robbery

My take on this: Stand your ground: it certainly started as a stand you ground situation. Assuming the driver wasn’t committing a crime while attempting to use the ATM, he had no duty to retreat or flee, and had every right to defend himself. I don’t really think this is a test of the stand your gro...

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by fr8mech
Tue Aug 03, 2021 9:19 pm
Forum: Technical/Operations
Topic: Can severe turbulence damage avionics in the E&E bay?
Replies: 12
Views: 1717

Re: Can severe turbulence damage avionics in the E&E bay?

There was one case where a bleed air duct detached during a severe turbulence encounter. However, it was determined that the connector was not secured correctly to beginn with and it would have shaken loose anyway, possibly a bit later: http://www.bst-tsb.gc.ca/eng/rapports-reports/aviation/2015/a1...

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by fr8mech
Tue Aug 03, 2021 9:07 pm
Forum: Technical/Operations
Topic: Boeing 707 non-standard second roof antenna
Replies: 13
Views: 1957

Re: Boeing 707 non-standard second roof antenna

Those are VHF antennas. The Global only has 2 VHF systems installed, unless there’s a third antenna obscured by the #3 engine. The Pan Am has 3 systems installed. When was the third installed? No idea. Back in the day, a third VHF system was probably an option. We didn’t put a third on our DC8’s unt...

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by fr8mech
Tue Aug 03, 2021 10:43 am
Forum: Technical/Operations
Topic: Can severe turbulence damage avionics in the E&E bay?
Replies: 12
Views: 1717

Re: Can severe turbulence damage avionics in the E&E bay?

In 30+ years of aircraft maintenance I can’t recall a single incident of “when in turbulence my ‘x’ was erratic” or “after turbulence the ‘x’ was inoperative”. Wiring is secured. Boxes are locked down. Racks and panels are robust and secured to the airframe. Connectors have a positive lock. Do thing...

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by fr8mech
Mon Aug 02, 2021 3:13 pm
Forum: Technical/Operations
Topic: Embraer E-jet questions.
Replies: 8
Views: 1553

Re: Embraer E-jet questions.

Not sure what the operating mechanism of the door look like (no experience on an EMB175), but we’ve had small leaks on our A300’s where the air is escaping through the seals in the operating mechanism. Pressurization leaks are either real easy to find, or a bastard. Those small leaks that come and g...

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by fr8mech
Thu Jul 29, 2021 10:08 am
Forum: Technical/Operations
Topic: Welding in the main gear well ?
Replies: 11
Views: 1575

Re: Welding in the main gear well ?

fr8mech wrote:

Without looking at the book, I'm pretty sure that Boeing considers wheel wells as enclosed spaces for classifying fuel leaks, so welding in there would be a no-no.


Meant to add "I suspect Airbus also classifies the wheel well the same way".

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by fr8mech
Thu Jul 29, 2021 9:29 am
Forum: Technical/Operations
Topic: Welding in the main gear well ?
Replies: 11
Views: 1575

Re: Welding in the main gear well ?

Normally, if something needs to be welded, it is removed from the aircraft. I have no experience on the A320, but I can't imagine that there is anything in the wheel well that would have to be welded in-situ. Without looking at the book, I'm pretty sure that Boeing considers wheel wells as enclosed ...

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by fr8mech
Tue Jul 27, 2021 3:05 pm
Forum: Non-Aviation
Topic: Advanced Child Tax Credit
Replies: 23
Views: 1568

Re: Advanced Child Tax Credit

So are you saying you're getting a tax credit that you're not eligible for ? No, I am eligible, I just don’t want it right now. We structure our tax strategy very carefully. Edit: we’re probably no longer eligible based on our new income. So, we don’t need this money, both in the short term, nor as...

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by fr8mech
Mon Jul 26, 2021 11:48 pm
Forum: Non-Aviation
Topic: Advanced Child Tax Credit
Replies: 23
Views: 1568

Re: Advanced Child Tax Credit

Life's a real bitch, but when you compound the issue with the burdens of the First World it becomes almost unbearable. Heads up - document verification is the next big fraud prevention thing, get used to it. If it's a requirement for voting it's going to be a requirement to fart in your own bed pre...

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