Search found 196 matches

by StereoTechque
Sun Jul 18, 2021 10:18 am
Forum: Technical/Operations
Topic: Protective corrosion coatings and aerodynamics
Replies: 7
Views: 890

Re: Protective corrosion coatings and aerodynamics

gregorygoodwin wrote:
.
Gregory


That was a fantastic read. Thank you for your inputs.

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by StereoTechque
Tue Jun 22, 2021 6:23 am
Forum: Technical/Operations
Topic: APU Usage
Replies: 18
Views: 3194

Re: APU Usage

Can I ask a dumb question? I've never seen an air conditioning hose that didn't have a fold or kink in it. Are they not actually *designed* to be that way? Actually they do. You just cant notice it when it is supplying High Volume Air as it becomes inflated. However old hoses do leak from areas whe...

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by StereoTechque
Wed May 19, 2021 7:23 pm
Forum: Technical/Operations
Topic: APU Inflight start on Battery
Replies: 8
Views: 1822

Re: APU Inflight start on Battery

Florianopolis wrote:
Could it be because the battery has less juice at lower temperatures?


Normally batteries are located in the Avionics bay which is temperature and pressure controlled. It is not exposed to ambient air. However they are ventilated to ambient by a small vent hole.

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by StereoTechque
Tue May 18, 2021 9:02 am
Forum: Technical/Operations
Topic: APU Inflight start on Battery
Replies: 8
Views: 1822

Re: APU Inflight start on Battery

Thank you all. Doubt cleared.

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by StereoTechque
Tue May 18, 2021 2:07 am
Forum: Technical/Operations
Topic: APU Inflight start on Battery
Replies: 8
Views: 1822

Re: APU Inflight start on Battery

Alright..So in that case the self sustaining speed of APU will increase as we go higher.

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by StereoTechque
Mon May 17, 2021 5:39 pm
Forum: Technical/Operations
Topic: APU Inflight start on Battery
Replies: 8
Views: 1822

APU Inflight start on Battery

APU installed on the A320 has a FL restriction of FL250 when only starting with batteries. However normally if TRU assisted then it can be started upto service ceiling.

What is the reason behind this?

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by StereoTechque
Sun Apr 04, 2021 5:40 am
Forum: Technical/Operations
Topic: That PW1000 howl
Replies: 11
Views: 2902

Re: That PW1000 howl

r6russian wrote:
oldannyboy wrote:
Oh and the whine of a spooling up RB211 naturally!!! .

everybody knows that theres no better sound in aviation than the RB211 spooling up


RB211 spool up is music for the Aviator Soul.
Even the IAEs on the A320 have a little of a sweet note.It was more evident on the older A1s.

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by StereoTechque
Fri Mar 26, 2021 7:15 am
Forum: Technical/Operations
Topic: Different manufacturers for jet engines #1 vs. #2
Replies: 25
Views: 4696

Re: Different manufacturers for jet engines #1 vs. #2

Engine manufacturers sometimes test their engines by replacing one of the regular engines on a quad. That's strictly for test purposes only, though. 0744433 Nice center gear, there... Hehe, Very observant! Looks like Airbus permanently deactivated Centre gear on this one as this bird might never lo...

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by StereoTechque
Mon Mar 08, 2021 10:40 am
Forum: Technical/Operations
Topic: Airbus Wing Hook Symbol
Replies: 2
Views: 1292

Re: Airbus Wing Hook Symbol

https://imgur.com/Y0Spn08

Hoist point attachment.
-->

2395511047 wrote:
Does anyone know the meaning of this "hook" "2" symbol found on an A320 (and other airbus models) wing and sometimes vertical stabilizer?

Thanks!

https://imgur.com/Y0Spn08

Hoist point attachment.

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by StereoTechque
Sat Feb 20, 2021 3:13 am
Forum: Technical/Operations
Topic: Is it true that when flying air pressure won't allow the cabin door to open?
Replies: 22
Views: 3236

Re: Is it true that when flying air pressure won't allow the cabin door to open?

Some cargo doors are outward opening plug type. The aft small cargo door (70") on the B777 for example is an outward opening plug type door (and I'm pretty sure it's the same on the B767). The forward large cargo door (106") and aft large cargo door (106", if installed) are non-plug ...

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by StereoTechque
Thu Jul 16, 2020 5:57 am
Forum: Technical/Operations
Topic: A320 Family Center Fuel Tank system changes?
Replies: 5
Views: 1738

Re: A320 Family Center Fuel Tank system changes?

What about the outer wing tanks? Do the post-2014 A319/A320 and A319neo/A320neo aircraft also have a single wing tank like the A321s? Single wing tank like the 321 would have been great. The 321 wing has a slightly thicker skin crossection and construction hence it could get away with No Outer Tank...

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by StereoTechque
Thu Jun 11, 2020 4:49 pm
Forum: Technical/Operations
Topic: Electric taxiing tug?
Replies: 11
Views: 3035

Re: Electric taxiing tug?

I would think that, while your idea might sound interesting, there are likely the following drawbacks: - Aircraft compatibility. Traditional tug need to connect to different aircraft by the means of different bars. Some exotic aircraft even need to carry their own tow bar in order to get pushed. - ...

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by StereoTechque
Thu Jun 04, 2020 6:50 am
Forum: Technical/Operations
Topic: Landing wind direction
Replies: 28
Views: 2915

Re: Landing wind direction

FriscoHeavy wrote:


Most large/heavy jets do NOT have tires rated to 230 knots or higher.


A320 tires for eg. are rated for max speed of 195 knots. (Im referring Michelin & Goodrich)

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by StereoTechque
Thu Jun 04, 2020 6:45 am
Forum: Civil Aviation
Topic: LEAP engines on 737 and A320 fall way short of on-wing targets
Replies: 42
Views: 11640

Re: LEAP engines on 737 and A320 fall way short of on-wing targets

Sokes wrote:
I don't know if 6000 hours is o.k., bad or very bad. Anybody has some comparisons, e.g. to Trents or GE90?
What about IAE V2500?


For IAE it is 8000 to 12000 hours when on the A320 depending on the borescope findings and thrust rating. When on the A321 it is less than 8000.

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by StereoTechque
Wed May 27, 2020 2:17 am
Forum: Technical/Operations
Topic: Advantages of a pullback vs a pushback?
Replies: 17
Views: 2541

Re: Advantages of a pullback vs a pushback?

I remember when AA used TRs for “pullback” on the MD80s at DFW. The sequence would start with a momentary forward motion, then you’d hear the TRs engage before starting your pullback. Except for the slight forward motion, it was pretty cool. It was called Powerback. Saved a few minutes of time but ...

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by StereoTechque
Wed May 27, 2020 2:14 am
Forum: Technical/Operations
Topic: No bare aluminum on retro livery aircraft
Replies: 10
Views: 2453

Re: No bare aluminum on retro livery aircraft

Bare Aluminium is challenging to maintain. It is best if the metal has a primer and a coat of paint over it for protection and cosmetic purposes.

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by StereoTechque
Fri May 22, 2020 3:15 am
Forum: Technical/Operations
Topic: Advantages of a pullback vs a pushback?
Replies: 17
Views: 2541

Re: Advantages of a pullback vs a pushback?

kabq737 wrote:
That’s interesting thanks for the answers everyone.

Can all aircraft have a tow bar connected from the rear?

Nope not all aircrafts have that luxury.
There is a provision on the A320 MLG so that it can be pulled back in case of NLG overrun.

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by StereoTechque
Mon May 18, 2020 7:02 am
Forum: Technical/Operations
Topic: RR CTi Fan Colour
Replies: 5
Views: 1295

Re: RR CTi Fan Colour

The turquoise color is inherent in the CTi formulation so... yes, these will be in the production engines and no, multiple colors would not be an option, nor is this for marketing purposes. You can see a similar color on the inner liner of the PW1100g engine. This is functional and a result of the ...

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by StereoTechque
Mon Apr 20, 2020 11:28 am
Forum: Technical/Operations
Topic: 747-200/300 with GE engines...Why the lower fuel capacity?
Replies: 17
Views: 2450

Re: 747-200/300 with GE engines...Why the lower fuel capacity?

Slightly off topic, the A320 with IAE engines have a slightly less Wing Tank capacity than the CFM counterparts due to the incorportaion of a Dry Bay inside the the Wing cell around the pylon area for additional safety. This can be a reason, however just a wild guess.

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by StereoTechque
Mon Apr 20, 2020 10:13 am
Forum: Technical/Operations
Topic: A320 Torque link Damper
Replies: 2
Views: 1707

Re: A320 Torque link Damper

Thank you JetMech. The Boeing literature cleared my doubt and I can somewhat now visualize the construction.

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by StereoTechque
Sat Apr 18, 2020 8:03 am
Forum: Technical/Operations
Topic: A320 Torque link Damper
Replies: 2
Views: 1707

A320 Torque link Damper

Anyone having internal construction reference of the same? Also does it dampen out Vertical(like shock strut) or Lateral movements? Can't seem to find any literature in the training manuals.

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by StereoTechque
Wed Apr 08, 2020 6:16 am
Forum: Technical/Operations
Topic: COVID19 stored aircraft chocks and engine covers
Replies: 7
Views: 2709

Re: COVID19 stored aircraft chocks and engine covers

Every new aircraft I have seen delivered from Airbus and Embraer comes with a cover kit for engines, pitots, apu exhaust, plugs for some air inlets, etc. Some airlines keep them on the aircraft, others remove them and store them in the line operations. These official covers are not necessarily requ...

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by StereoTechque
Sat Apr 04, 2020 6:30 am
Forum: Technical/Operations
Topic: A320 antenna locations
Replies: 9
Views: 2266

Re: A320 antenna locations

#7 is drain for fluids from the APU Compt. Kiss seals. It drains fluids when the aircraft is in the air sensing a certain pressure difference.(No elec sensors used)

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by StereoTechque
Sat Mar 28, 2020 8:16 am
Forum: Technical/Operations
Topic: Indigo A321neo Exit Config...
Replies: 2
Views: 914

Re: Indigo A321neo Exit Config...

6E initially took 321N with all exits active. Later however it was noticed that one Overwing exit is enough for evacuation of current 222 configuration. Hence they blanked out one Overwing exit to save on maintenance cost.

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by StereoTechque
Fri Feb 28, 2020 5:16 am
Forum: Technical/Operations
Topic: Silly designs in otherwise great aircraft
Replies: 56
Views: 8064

Re: Silly designs in otherwise great aircraft

I find the fasteners used to secure Radome on the 737 very lame. They should have used latches on the later models like on the A320. One faster overtorqued and the anchor breaks. Then you have to open the Radome again for access.

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by StereoTechque
Fri Feb 28, 2020 5:13 am
Forum: Technical/Operations
Topic: Silly designs in otherwise great aircraft
Replies: 56
Views: 8064

Re: Silly designs in otherwise great aircraft

BWIAirport wrote:
Why there has to be a 6-inch gap between passenger window planes is beyond me. I'm sure there's a reason for it, but it makes night filming quite difficult.


To maintain structural integrity of the fuselage by reducing chances of fracture.

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by StereoTechque
Sat Feb 08, 2020 6:45 pm
Forum: Civil Aviation
Topic: Strange taxing accident. 737 separates from tug... fatal injury to tug driver
Replies: 15
Views: 5782

Re: Strange taxing accident. 737 separates from tug... fatal injury to tug driver

I know it is too early to speculate, but watching the video it seems the Towing speed was high followed by a sudden braking by the Tug causing tow bar failure. Will have to wait for the official report to be out.

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by StereoTechque
Tue Jan 07, 2020 7:47 am
Forum: Technical/Operations
Topic: MLG Wheel falls off AC Dash-8 on takeoff - 2 days ago
Replies: 11
Views: 1237

Re: MLG Wheel falls off AC Dash-8 on takeoff - 2 days ago

Same incident happened on an A320 a couple of years ago, where the nose wheel liberated after Aircraft rotation. Investigation revealed the Final Torque was given after the lowering the axle jack, resulting in inadequate final torque and loosening of the axle nut.

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by StereoTechque
Wed Oct 23, 2019 11:06 am
Forum: Technical/Operations
Topic: Airbus Radome
Replies: 9
Views: 7063

Re: Airbus Radome

https://www.airliners.net/photo/Untitle ... /5736301/L

Is this also some kind of an Erosion boot for the Boeing?
-->

https://www.airliners.net/photo/Untitle ... /5736301/L

Is this also some kind of an Erosion boot for the Boeing?

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by StereoTechque
Mon Aug 05, 2019 1:32 pm
Forum: Technical/Operations
Topic: Airbus Radome
Replies: 9
Views: 7063

Re: Airbus Radome

Thank you VC-10 and fr8mech. That explains it.

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by StereoTechque
Sat Aug 03, 2019 5:01 pm
Forum: Technical/Operations
Topic: Airbus Radome
Replies: 9
Views: 7063

Re: Airbus Radome

Starlionblue wrote:
The radome is composite. The aircraft in this case is aluminium. Thus different surfaces.


Correct. But why is the composite Radome in two colors in the pic. It is evident on unpainted Airbuses. On the A320 for eg: Radome can be mfg using AFRP, QFRP, GFRP. or may be even more materials.

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by StereoTechque
Sat Aug 03, 2019 1:04 pm
Forum: Technical/Operations
Topic: Airbus Radome
Replies: 9
Views: 7063

Airbus Radome

https://www.airliners.net/photo/Untitled/Airbus-A340-642/418535/L?qsp=eJwtjLsOwjAMRf/FMxuIoVsRDCylQ/kAK76CikIi2xJEVf%2BdpLCd%2B9CZKcSX4%2BNDTqCGDKzhThtKrPw0amZ6IL%2BjSmG6dn177obTsRwsqh9yKYUdbQhIDvn3FxVonWBhdd2qe1cR2v/Sdl%2BijJYmXi1wHidali/%2BXi%2BK As per the pic is anyone aware what is the reason b...

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by StereoTechque
Sun Jul 14, 2019 8:00 am
Forum: Technical/Operations
Topic: Retread Tires on Commercial Planes
Replies: 22
Views: 2871

Re: Retread Tires on Commercial Planes

My observation on the A320 with Radial tyres: Have seen retreading not more than 5 times on a single tyre. Usually denoted by R1,R2 as such. And the Vendor carries out Shearography Inspection to make sure a tire is fit for a re-tread. Ive heard you can do more number of Retreads on a bias but the li...

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by StereoTechque
Tue May 28, 2019 7:04 pm
Forum: Technical/Operations
Topic: What is the dynamics or reason behind the turboprops rotating blades in opposite directions?
Replies: 22
Views: 5188

Re: What is the dynamics or reason behind the turboprops rotating blades in opposite directions?

The downside is that while the turbomachinery in all four engines will be identical, two engines will require additional gearbox components, a larger oil system and a mirror-image propeller design, increasing support costs. ] Counter rotating props on the same axis are for reducing the counter torq...

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by StereoTechque
Sat Apr 13, 2019 2:26 pm
Forum: Technical/Operations
Topic: De-rating a CFM56?
Replies: 14
Views: 3802

Re: De-rating a CFM56?

Say an engine is derated to x amount of thrust rating from a possible and higher y rating. Will the max EGT reduce and the EGT margin increase during normal operations.?

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by StereoTechque
Mon Nov 19, 2018 7:56 am
Forum: Technical/Operations
Topic: Aircraft Tire Brand Options
Replies: 24
Views: 3330

Re: Aircraft Tire Brand Options

Yes customer options eg. Bridgestone, Michelin, Good Year.

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by StereoTechque
Sun Oct 21, 2018 8:14 am
Forum: Technical/Operations
Topic: Cockpit differences between the modern A320/321 and the ones made in the 1990s.
Replies: 26
Views: 4960

Re: Cockpit differences between the modern A320/321 and the ones made in the 1990s.

[quote="Flow2706"][/quote]
Wow, that's a nice summary. Any idea why the fuel system of A321 with no transfer valves can't be incorporated in the A320?

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by StereoTechque
Sun Oct 21, 2018 4:07 am
Forum: Technical/Operations
Topic: Cockpit differences between the modern A320/321 and the ones made in the 1990s.
Replies: 26
Views: 4960

Re: Cockpit differences between the modern A320/321 and the ones made in the 1990s.

There are a few namely-
LCD screens.
Standby horizon, standby ASI, RMI replaced by ISIS (digital)
Old ones had floppy driver for data loading in the center pedestal.
New ones especially Neo's have LED lighting in the cockpit.

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by StereoTechque
Sat Oct 20, 2018 12:23 am
Forum: Technical/Operations
Topic: Increase in MTOW
Replies: 13
Views: 2441

Re: Increase in MTOW

Chaostheory wrote:
When I flew for a now defunct UK airline, the CAA allowed us to operate the A319/320 under a flexible MTOW scheme. One sector we may be flying at 73.5t and the next may be upped to 75 or 77t.


Great. Never heard of such a practice before.

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by StereoTechque
Wed Oct 17, 2018 4:56 am
Forum: Technical/Operations
Topic: Increase in MTOW
Replies: 13
Views: 2441

Re: Increase in MTOW

In certain cases you only have to write a check and someone will hand you a piece of paper saying so. Haha.. Initially when the A320s rolled out they were having a MTOW of around 65T. Current 320 are around 77T. Your cheque writing might work for a few tons but in this case there must be something ...

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by StereoTechque
Tue Oct 16, 2018 6:18 pm
Forum: Technical/Operations
Topic: Increase in MTOW
Replies: 13
Views: 2441

Increase in MTOW

The A320 Neo's at the Airline I work for have come with Three MTOW'S. 73.5 initially, then 74 and now in 79T. How does the Airframe become more capable of lifting heavier loads after a certain point of time? I know the engine thrust rating is same in all three..

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by StereoTechque
Tue Oct 16, 2018 5:15 pm
Forum: Technical/Operations
Topic: A320neo engine model swap
Replies: 2
Views: 888

Re: A320neo engine model swap

On the A320 Neo, with different engines comes a different pylon design. So the answer is No, Practically and financially not advisable.

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by StereoTechque
Wed Oct 03, 2018 3:16 pm
Forum: Technical/Operations
Topic: Fully charge and pre-charged accumulator?
Replies: 6
Views: 1838

Re: Fully charge and pre-charged accumulator?

Hi, Im a Mechanic myself and precharge means the charge that the Air/Gas Pressure that you have to charge the accumulator to be available in an unused state (Green Band). It normally varies iaw the ambient Temperature.

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by StereoTechque
Sat Jun 30, 2018 12:29 pm
Forum: Technical/Operations
Topic: B787 red beacon steady?
Replies: 8
Views: 2079

Re: B787 red beacon steady?

The 787 Beacon LED's have this problem of remaining steady. I have observed a lot of times.

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by StereoTechque
Fri Jun 29, 2018 1:30 pm
Forum: Technical/Operations
Topic: Mx personnel working in Canada
Replies: 2
Views: 546

Mx personnel working in Canada

Anyone out here from Maintenance/Engineering in Canada. Wanted to know who is the regulatory authority out there and compared to the US how is the work culture?

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by StereoTechque
Mon Mar 05, 2018 7:19 pm
Forum: Technical/Operations
Topic: Angled nose gear leg
Replies: 7
Views: 1541

Re: Angled nose gear leg

The DC10, MD11 and A320 series aircraft are a few types that have a pronounced ‘forward angled’ nose gear Curious as to why it was designed this way, there is a disadvantage, in a tight turn the nosewheel on the outside of the turn actually comes off the ground, not good for steering, especially wh...

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by StereoTechque
Thu Feb 22, 2018 2:39 am
Forum: Technical/Operations
Topic: "Petal" thrust reversers? Inferior to "cascade" T/Rs?
Replies: 18
Views: 2905

Re: "Petal" thrust reversers? Inferior to "cascade" T/Rs?

When deployed at a higher touchdown speed, the petal type offers a slight advantage as it generates additional form drag by increasing the surface area against the airflow.

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by StereoTechque
Fri Feb 09, 2018 1:36 pm
Forum: Technical/Operations
Topic: Preferred Engine
Replies: 5
Views: 1163

Re: Preferred Engine

Maintenance wise I think you can never go wrong on a CFM..

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by StereoTechque
Fri Jan 19, 2018 7:59 pm
Forum: Technical/Operations
Topic: Polished engine cowlings
Replies: 4
Views: 1021

Re: Polished engine cowlings

BravoOne wrote:
Pretty much an appearance enhancement.


That is all it is. You will notice the polished Cowl Lips more on private jets then scheduled airlines. They are of the same material none the less. It's just that some operators polish them while others do not..

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