Search found 185 matches

by StereoTechque
Thu Jun 11, 2020 4:49 pm
Forum: Technical/Operations
Topic: Electric taxiing tug?
Replies: 9
Views: 1693

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: 2641

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: 11176

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: 2370

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: 2216

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: 2370

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: 1168

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: 2166

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: 1299

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: 1299

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: 2573

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: 972

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: 876

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: 7712

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: 7712

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: 5616

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: 1133

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: 6780

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: 6780

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: 6780

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: 6780

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: 2648

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: 4890

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: 3553

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: 2909

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: 4455

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: 4455

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: 2316

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: 2316

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: 2316

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: 826

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: 1648

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: 1842

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: 469

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: 1413

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: 2631

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: 1120

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: 980

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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by StereoTechque
Thu Jan 18, 2018 2:28 pm
Forum: Technical/Operations
Topic: Aircraft Skin Material
Replies: 6
Views: 1477

Re: Aircraft Skin Material

SRM like other manufacturer manuals are not easily available to general public. Airbus SRM and its manuals are available to each of its operator on a software called [email protected] which is very user friendly. SRM is a non customised manufacturer document specifying materials, allowable damages on structure...

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by StereoTechque
Thu Jan 18, 2018 2:24 pm
Forum: Technical/Operations
Topic: Gate or Stand
Replies: 14
Views: 1466

Re: Gate or Stand

BWIAirport wrote:
From what I can tell, 'gate' is used from the passenger standpoint and 'stand' is used from the aircraft ops standpoint. They usually directly coincide.


Thats pretty much it. Often used interchangeably even on Radio comms.

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by StereoTechque
Wed Jan 10, 2018 10:09 am
Forum: Technical/Operations
Topic: IAE V2500 status
Replies: 15
Views: 2881

Re: IAE V2500 status

A320FlyGuy wrote:
While the CFM may be king, I can say that I prefer the IAE V2500....not that my opinion matters. :-)


Any specific reason behind the preference apart from lower noise?

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by StereoTechque
Wed Jan 10, 2018 4:10 am
Forum: Technical/Operations
Topic: A320 cockpit window frames
Replies: 3
Views: 1019

Re: A320 cockpit window frames

Florianopolis wrote:

Just my guess: That is an area that is tough to keep looking good cosmetically. Paint chips off screws, and replacing windshields can mess up a perfect paint job. See what I mean, below. If you paint it all a metallic gray, than if it flakes, you can't even tell.


Spot on Florianopolis!!

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by StereoTechque
Wed Jan 03, 2018 1:13 pm
Forum: Technical/Operations
Topic: beacon and strobe
Replies: 11
Views: 1304

Re: beacon and strobe

I think even with all those little differences, we all agree that one main reason to have beacon is to show to the outer world (ground staff in general) that the plane is getting started (or is running). So, basically a warning light. Be it a pushback, startup or coming to blocks, it means "mo...

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by StereoTechque
Thu Dec 21, 2017 10:42 am
Forum: Technical/Operations
Topic: What kind of stuff is on the NEF, MEL, and CDL?
Replies: 17
Views: 5118

Re: What kind of stuff is on the NEF, MEL, and CDL?

7BOEING7 wrote:
I’d add one more document:

DDPG - Dispatch Deviation Procedures Guide.


Is this same as a DMR entry (deferred maintenance record) eg : few fasteners or a faulty latch. These things are not specified in CDL or MEL. Sometimes can be found in AMM.

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by StereoTechque
Tue Dec 12, 2017 3:38 pm
Forum: Technical/Operations
Topic: A320 Weight Variant
Replies: 5
Views: 4257

Re: A320 Weight Variant

Got a little more information on the subject that I wish to share.. Weight Variant is defined by MTOW, MLW and MZFW. WV parameters may have certain influence on fatigue life of structural repairs and allowable damage limits. To differentiate fleet per WV allows us to maximise allowable damage and si...

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by StereoTechque
Mon Nov 13, 2017 2:47 pm
Forum: Technical/Operations
Topic: Loose, Leaking or Missing Engine Oil Filler Cap
Replies: 13
Views: 2751

Re: Loose, Leaking or Missing Engine Oil Filler Cap

Thank you all of experts for your valuable answers! Can anybody explain about the anti-siphon mechanism fitted to the aircraft oil tanks. I went through many documents but unfortunately unable to find out anything related to aviation. Siphoning by definition means xfer of fluid from a higher point ...

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by StereoTechque
Sat Nov 11, 2017 5:10 pm
Forum: Technical/Operations
Topic: Bird Strike Nose--Experience
Replies: 7
Views: 1098

Re: Bird Strike Nose--Experience

From a Mx personnel point of view, if there is a minor bird strike, it can result in a minor dent which may result in internal delamination or if we are lucky it may just have blood stains. In case of a Vulture or an Eagle hit, usually the impact is far severe and can result in rupture of Radome wit...

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by StereoTechque
Sat Nov 11, 2017 1:20 pm
Forum: Technical/Operations
Topic: Engine cooling on short hops
Replies: 35
Views: 6499

Re: Engine cooling on short hops

ThrottleHold wrote:
The famous GE90 growl on start up is a direct result of Rotor Bow..

Ive come across this GE90 growl quote many times across this forum. Any reference to this phenomenon?

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by StereoTechque
Sun Oct 22, 2017 6:58 pm
Forum: Technical/Operations
Topic: Maintenance Bus in A320
Replies: 6
Views: 2246

Re: Maintenance Bus in A320

The Maintenance/Service bus powers only those consumers which are necessary for maintenance like cabin lights, Cargo door, cargo door lights avionics compt. lights to name a few.

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