Search found 86 matches

  • 1
  • 2
by aerotech777
Sat Mar 09, 2019 1:18 pm
Forum: Technical/Operations
Topic: Out of Curiosity: Two Different Engines on Same Airframe Safer?
Replies: 24
Views: 3265

Re: Out of Curiosity: Two Different Engines on Same Airframe Safer?

Not really in the same subject of the thread, but different engines are installed for example on a same aircraft for testing new engine (common practice). Even one UDF engine (Propfan) was installed on aircraft (I think it was B727) to test purpose. I remember when Boeing was saying that in Boeing 7...

Jump to post
by aerotech777
Mon Feb 11, 2019 5:45 am
Forum: Technical/Operations
Topic: Lion Air crash from maintenance perpective
Replies: 13
Views: 2346

Re: Lion Air crash from maintenance perpective

I forgot to mention that there is risk of damaging the ADM during the flush if the AMT exceeds certain pressure with the ADM connected to the system.

I am wondering if a leak check for pitot and static system is recommended for such defect (IAS and ALT disagree).

Jump to post
by aerotech777
Mon Feb 11, 2019 5:14 am
Forum: Technical/Operations
Topic: Lion Air crash from maintenance perpective
Replies: 13
Views: 2346

Lion Air crash from maintenance perpective

There was a lot of talk regarding Lion Air Crash especially about MCAS, pilots, AOA sensor, etc... There was also talk about the poor safety record. I would like to talk about aircraft maintenance, more importantly about the compliance with the procedures in the AMM (Aircraft Maintenance Manual) and...

Jump to post
by aerotech777
Mon Jan 21, 2019 5:58 am
Forum: Technical/Operations
Topic: Compressor wash and carbon deposits
Replies: 22
Views: 3035

Re: Compressor wash and carbon deposits

Thanks for your replies. the LIX wash system we used flushed all kinds of soot and Carbon out of the engine, It took a long time but it's now used to restore engine performance. It will restore proper Spray pattern to the Start Nozzles and clean the total Gas Path, I just wish I'd have invented it!!...

Jump to post
by aerotech777
Sun Jan 06, 2019 10:39 am
Forum: Technical/Operations
Topic: Compressor wash and carbon deposits
Replies: 22
Views: 3035

Re: Compressor wash and carbon deposits

Thanks guys for your replies. I am a former AMT, so I am little bit familiar with jet engines and ignition system in the jet engines. It is my bad, I should say igniter plugs instead of spark plugs. I know the combustion in jet engines self-sustains but the ignition is turned on certain critical pha...

Jump to post
by aerotech777
Sun Jan 06, 2019 10:37 am
Forum: Technical/Operations
Topic: Compressor wash and carbon deposits
Replies: 22
Views: 3035

Re: Compressor wash and carbon deposits

Thanks guys for your replies. I am a former AMT, so I am little bit familiar with jet engines and ignition system in the jet engines. It is my bad, I should say igniter plugs instead of spark plugs. I know the combustion in jet engines self-sustains but the ignition is turned on certain critical pha...

Jump to post
by aerotech777
Sun Jan 06, 2019 4:31 am
Forum: Technical/Operations
Topic: Compressor wash and carbon deposits
Replies: 22
Views: 3035

Compressor wash and carbon deposits

Hi, Years ago we had problems with the CFM-56-2 and the -3's We figured out the fuel nozzles were clogging and leaking and failing due to being coked up. We instituted an engine wash program which cleaned the fuel nozzles and all of that ended. But only after having changed 100's of fuel nozzles fir...

Jump to post
by aerotech777
Tue Oct 16, 2018 3:57 pm
Forum: Civil Aviation
Topic: Airbus A320neo Family Production/Delivery Thread 2018
Replies: 689
Views: 204113

Re: Airbus A320neo Family Production/Delivery Thread 2018

Hi,


a) How long it takes to build A320 in the final assembly line? I mean here from day one in the FAL to roll out from it.


c) How long it takes A320 from roll out to delivery?

Feedback appreciated.

Jump to post
by aerotech777
Thu Oct 11, 2018 4:48 pm
Forum: Technical/Operations
Topic: Final assembly Line: Boeing vs airbus
Replies: 2
Views: 1238

Final assembly Line: Boeing vs airbus

Hi, I have some questions regarding Boeing and Airbus FAL (final assembly line). Please disregard the problem of supply chain (engines...etc). I take as example :B737 vs A320 and A350 vs B787. Please be objective and if possible provide evidence. a) What are the advantages and disadvantages of the F...

Jump to post
by aerotech777
Sun Jul 29, 2018 10:17 pm
Forum: Technical/Operations
Topic: Nose wheel Brakes on Airliners
Replies: 129
Views: 9045

Re: Nose wheel Brakes on Airliners

Hi, I worked on B727 with nose wheel brakes long time ago. If I recall correctly I changed only one time the nose wheel brakes because of hydraulic leak (from the pistons of the brake). I never changed the nose wheel brakes because of the wear in the brakes on B727. Also on B727 I rarely changed the...

Jump to post
by aerotech777
Wed Feb 07, 2018 4:54 pm
Forum: Technical/Operations
Topic: What makes the B737 an "old, outdated" design?
Replies: 143
Views: 13537

Re: What makes the B737 an "old, outdated" design?

Hi, IIMU that the crew's early decision to start the APU (an item they never reached in the checklist), allowing the flight control system to remain in Normal Law with attendant envelope protections, was cited by authorities as a major contributor to the successful outcome of the ditching. I would a...

Jump to post
by aerotech777
Sun Feb 04, 2018 6:29 pm
Forum: Technical/Operations
Topic: What makes the B737 an "old, outdated" design?
Replies: 143
Views: 13537

Re: What makes the B737 an "old, outdated" design?

Hi, Good question. I couldn't find photos showing the aft doors open while in the water. What could have made the A320 tail heavy? Fuel tanks in the horizontal stabilizers? Fully loaded containers? The ditching pushbutton can also be found on the 330/340 and the 350. It does get used in normal ops w...

Jump to post
by aerotech777
Wed Jan 10, 2018 5:35 pm
Forum: Technical/Operations
Topic: A350 EDP clutch
Replies: 10
Views: 1867

Re: A350 EDP clutch

Thanks zeke for your post. zeke wrote: The clutch disconnect can be used by Crew from the cockpit in response to some faults or can be activated on the pump by mechanics to dispatch the aircraft under the MEL with one of the 4 EDPs inoperative. a) Does the pilot use a switch from the cockpit to disc...

Jump to post
by aerotech777
Sun Jan 07, 2018 5:11 pm
Forum: Technical/Operations
Topic: A350 EDP clutch
Replies: 10
Views: 1867

Re: A350 EDP clutch

Thanks for the feedback. I am aware of the depressurization solenoid (the switch in the cockpit should remain ON to prolong solenoid life) of the EDP. Since A350 is [b][b] new [/b][/b] aircraft I said may be the EDP is fitted with a clutch as it is mentioned in link above. So I am wondering if the A...

Jump to post
by aerotech777
Thu Jan 04, 2018 9:58 pm
Forum: Technical/Operations
Topic: A350 EDP clutch
Replies: 10
Views: 1867

A350 EDP clutch

Hi, http://www.smartcockpit.com/docs/a350-900-flight-deck-and-systems-briefing-for-pilots.pdf In the link above (ATA 29, page 29.3), it is said that "The Hydraulic System Monitoring Unit (HSMU) monitors EDP clutch". -What's the function of the clutch in this EDP (engine driven pump)? -Besi...

Jump to post
by aerotech777
Mon Jun 06, 2016 4:14 am
Forum: Technical/Operations
Topic: Bowed Rotor
Replies: 13
Views: 6493

Bowed Rotor

Hi, I have few questions regarding bowed rotor on <acronym title="Precision Air Services (United Rep. of Tanzania)">PW</acronym> 1100 engine. If I am not mistaken this problem was discovered after the engine was certified. a) Why <acronym title="Precision Air Services (United Rep. of Tanzania)">PW</...

Jump to post
by aerotech777
Sat Feb 20, 2016 7:50 am
Forum: Civil Aviation
Topic: A321neo Out Of Action
Replies: 84
Views: 30501

RE: A321neo Out Of Action

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/Part147" class="quote" target="_blank">Part147</a> (<a href="#56" class="quote">Reply 56</a>):<br/><i/></font></td></tr></table> Both pictures t...

Jump to post
by aerotech777
Sun Nov 23, 2014 8:50 pm
Forum: Technical/Operations
Topic: QRH: Avoid Icing Conditions
Replies: 4
Views: 3593

QRH: Avoid Icing Conditions

Hi, I was reading 737 QRH (online document) and I found this statement "Avoid icing conditions" for certain cases such wing-body overheat or bleed trip off. First I want to say I am not pilot and I don't know if this document is updated. If I am not mistaken icing conditions mean: <acronym title="Po...

Jump to post
by aerotech777
Fri Sep 05, 2014 3:40 am
Forum: Technical/Operations
Topic: LP Turbine Stages: Leap 1A Vs PW1000G
Replies: 2
Views: 3283

LP Turbine Stages: Leap 1A Vs PW1000G

Hi, Leap 1A (A320neo) is fitted with 7 <acronym title="Lan Peru">LP</acronym> turbine stages. PW1000G (A320neo) is fitted with 3 <acronym title="Lan Peru">LP</acronym> turbine stages. Why such difference for <acronym title="Lan Peru">LP</acronym> turbine stages? Feedback appreciated. Regards

Jump to post
by aerotech777
Tue Apr 08, 2014 1:58 am
Forum: Technical/Operations
Topic: The Efficiency Of Rain Gutters On Aircraft
Replies: 13
Views: 9202

RE: The Efficiency Of Rain Gutters On Aircraft

Quote from another forum: "Boeing 747 aircraft have to be inspected for heavy water ingress to the <acronym title="Manta - General Eloy Alfaro (MEC / SEMT), Ecuador">MEC</acronym> if large amounts of rain water has entered via the forward doors. An electrical nightmare that has had many modification...

Jump to post
by aerotech777
Sun Mar 30, 2014 8:35 pm
Forum: Technical/Operations
Topic: The Efficiency Of Rain Gutters On Aircraft
Replies: 13
Views: 9202

RE: The Efficiency Of Rain Gutters On Aircraft

Hi, I have some questions regarding the pic on the following link: <a href="http://www.flickr.com/photos/flightblogger/4348102892/in/set-72157623280980561" target="_blank">http://www.flickr.com/photos/flightb...348102892/in/set-72157623280980561</a> a) The rain gutter above the cargo door seems bigg...

Jump to post
by aerotech777
Fri Mar 21, 2014 12:45 am
Forum: Technical/Operations
Topic: The Efficiency Of Rain Gutters On Aircraft
Replies: 13
Views: 9202

RE: The Efficiency Of Rain Gutters On Aircraft

a) Besides the regular rain gutters, some aircraft are fitted with additional rain gutters. For example there is rain gutter above the upper hinge on each entry and service galley B 737 <acronym title="Lauda Air (Austria)">NG</acronym>. Why these additional rain gutters (above the upper hinge of the...

Jump to post
by aerotech777
Tue Mar 18, 2014 1:46 am
Forum: Technical/Operations
Topic: The Efficiency Of Rain Gutters On Aircraft
Replies: 13
Views: 9202

The Efficiency Of Rain Gutters On Aircraft

Hi, I have some questions regarding the efficiency of rain gutters (metal strips above aircraft doors) on aircraft. I am talking here about airliners (Boeing, Airbus,...etc.). I mean by efficiency: less corrosion around door entry, comfort for passengers (rain water not dripping on passengers while ...

Jump to post
by aerotech777
Thu Jan 30, 2014 1:50 am
Forum: Technical/Operations
Topic: Boeing 737 MAX FBW Spoiler System
Replies: 21
Views: 20636

RE: Boeing 737 MAX FBW Spoiler System

Thanks for the feedback. <table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/boeingfixer" class="quote" target="_blank">boeingfixer</a> (<a href="#2" class="quote">Reply 2</a>):<br/><i>This is a m...

Jump to post
by aerotech777
Sun Jan 26, 2014 7:20 pm
Forum: Technical/Operations
Topic: Boeing 737 MAX FBW Spoiler System
Replies: 21
Views: 20636

Boeing 737 MAX FBW Spoiler System

Hi, Boeing opted FBW for the spoiler system. Boeing made few changes in B 737 MAX in order to reduce the cost. Yet Boeing adopted FBW for the spoiler system which it seems to me it is big change. Why Boeing opted FBW specifically for the spoiler system ? Why not FBW for rudder, elevator, or aileron ...

Jump to post
by aerotech777
Sat Dec 14, 2013 8:47 am
Forum: Civil Aviation
Topic: Boeing And Their Unions - The Future? Part 2
Replies: 92
Views: 9429

RE: Boeing And Their Unions - The Future? Part 2

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/Stitch" class="quote" target="_blank">Stitch</a> (<a href="#2" class="quote">Reply 2</a>):<br/><i>According to local news radio, there seems to ...

Jump to post
by aerotech777
Sun Nov 17, 2013 10:19 pm
Forum: Technical/Operations
Topic: Labor Unions: Boeing Vs Airbus
Replies: 58
Views: 17226

Labor Unions: Boeing Vs Airbus

I have an brief idea about unions at Boeing such IAM 751 or the SPEEA. I don't know about labor unions at Airbus. a) I am wondering if Airbus has unions for machinists, engineers...etc. It seems that Boeing want reduce some benefits for machinists to be more competitive than Airbus. That's what Boei...

Jump to post
by aerotech777
Sun Sep 29, 2013 7:20 pm
Forum: Technical/Operations
Topic: Vmcg Testing
Replies: 20
Views: 12465

RE: Vmcg Testing

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/OldAeroGuy" class="quote" target="_blank">OldAeroGuy</a> (<a href="#18" class="quote">Reply 18</a>):<br/><i>EASA has allowed the use of lateral ...

Jump to post
by aerotech777
Sat Sep 28, 2013 5:48 pm
Forum: Technical/Operations
Topic: Vmcg Testing
Replies: 20
Views: 12465

RE: Vmcg Testing

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/zeke" class="quote" target="_blank">zeke</a> (<a href="#14" class="quote">Reply 14</a>):<br/><i>Minimum control speed are a function of the airf...

Jump to post
by aerotech777
Thu Sep 26, 2013 9:24 pm
Forum: Technical/Operations
Topic: Leak Check (air, Hydraulic, Oil, And Fuel)
Replies: 22
Views: 8889

RE: Leak Check (air, Hydraulic, Oil, And Fuel)

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/yeelep" class="quote" target="_blank">yeelep</a> (<a href="#20" class="quote">Reply 20</a>):<br/><i>737NG AMM 71-71-00 engine vents and drains i...

Jump to post
by aerotech777
Tue Sep 24, 2013 11:03 pm
Forum: Technical/Operations
Topic: Leak Check (air, Hydraulic, Oil, And Fuel)
Replies: 22
Views: 8889

RE: Leak Check (air, Hydraulic, Oil, And Fuel)

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/Apprentice" class="quote" target="_blank">Apprentice</a> (<a href="#18" class="quote">Reply 18</a>):<br/><i>For both Boeing and Airbus, AMM from...

Jump to post
by aerotech777
Thu Sep 19, 2013 10:27 pm
Forum: Technical/Operations
Topic: Leak Check (air, Hydraulic, Oil, And Fuel)
Replies: 22
Views: 8889

RE: Leak Check (air, Hydraulic, Oil, And Fuel)

Thank you for your feedback <table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/VC-10" class="quote" target="_blank">VC-10</a> (<a href="#4" class="quote">Reply 4</a>):<br/><i>Which type of leak c...

Jump to post
by aerotech777
Sun Sep 15, 2013 8:46 pm
Forum: Technical/Operations
Topic: Leak Check (air, Hydraulic, Oil, And Fuel)
Replies: 22
Views: 8889

RE: Leak Check (air, Hydraulic, Oil, And Fuel)

Certain hydraulic components require driving the engine driven pump (for example EDP pressure filter, EDP case drain filter, ...etc.). In addition the electric pump provides low hydraulic flow (volume) compared to EDP especially for certain hydraulic users (for example slats if I am not mistaken).

Jump to post
by aerotech777
Sun Sep 15, 2013 8:19 pm
Forum: Technical/Operations
Topic: Leak Check (air, Hydraulic, Oil, And Fuel)
Replies: 22
Views: 8889

Leak Check (air, Hydraulic, Oil, And Fuel)

Hi, If I am not mistaken dry motoring drives <acronym title="Aerolineas Internacionales SA de CV (Mexico)">N2</acronym>/N3 to around 20%-25% <acronym title="Aerolineas Internacionales SA de CV (Mexico)">N2</acronym>/N3. I am assuming N1 will be driven at very low speed: may be 1% or 3% N1 ??? a) Whe...

Jump to post
by aerotech777
Wed Sep 04, 2013 1:38 am
Forum: Technical/Operations
Topic: A320 And A321 Water Tank
Replies: 12
Views: 13195

RE: A320 And A321 Water Tank

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/yeelep" class="quote" target="_blank">yeelep</a> (<a href="#2" class="quote">Reply 2</a>):<br/><i/></font></td></tr></table> Not Airbus, but the...

Jump to post
by aerotech777
Mon Sep 02, 2013 5:44 pm
Forum: Technical/Operations
Topic: Thrust Asymmetry
Replies: 9
Views: 4579

RE: Thrust Asymmetry

I am still wondering if there is procedure from the aircraft manufacturer or airline/aircraft operator in case of thrust asymmetry after engine failure on ground. Is it up to the pilot to decide what to do: use the thrust reverser? or use differential braking? use of <acronym title="Northwest Airlin...

Jump to post
by aerotech777
Sat Aug 31, 2013 8:00 pm
Forum: Technical/Operations
Topic: Thrust Asymmetry
Replies: 9
Views: 4579

Thrust Asymmetry

Hi, I read somewhere that using <acronym title="Northwest Airlines (USA)">NW</acronym> steering is not efficient in case of thrust asymmetry after engine failure especially after certain speed and below Vmcg. a) Is the statement above true? Other persons mentioned the use of differential braking in ...

Jump to post
by aerotech777
Mon Jul 01, 2013 11:04 pm
Forum: Technical/Operations
Topic: APU Fuel Drain Mast
Replies: 6
Views: 8959

APU Fuel Drain Mast

Hi, "There are two drain masts. The one just aft of the port wheel-well is shared with the hydraulic reservoir vent and is a shrouded line enclosing the APU fuel supply line, this collects any leakage of fuel into the shroud which can be drained when a stop cork is pushed up in the wheel-well. If fu...

Jump to post
by aerotech777
Sun May 19, 2013 9:07 pm
Forum: Technical/Operations
Topic: Vacuum Waste Vs Recirculating
Replies: 16
Views: 8487

Vacuum Waste Vs Recirculating

Hi, Modern aircraft are fitted vacuum waste system at the opposite of old aircraft that are fitted with recirculating waste system. a) What are advantages and the disadvantages of vacuum waste system? b) What are advantages and the disadvantages of recirculating waste system? c) How often the toilet...

Jump to post
by aerotech777
Sat Sep 15, 2012 10:53 pm
Forum: Technical/Operations
Topic: A330 X A340 Performance: South Atlantic Crossings
Replies: 68
Views: 22902

RE: A330 X A340 Performance: South Atlantic Crossings

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/Pihero" class="quote" target="_blank">Pihero</a> (<a href="#65" class="quote">Reply 65</a>):<br/><i>There is no such thing as an "accelerate-sto...

Jump to post
by aerotech777
Mon Sep 10, 2012 11:51 pm
Forum: Technical/Operations
Topic: A330 X A340 Performance: South Atlantic Crossings
Replies: 68
Views: 22902

RE: A330 X A340 Performance: South Atlantic Crossings

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/zeke" class="quote" target="_blank">zeke</a> (<a href="#50" class="quote">Reply 50</a>):<br/><i>: Takeoff distances are all done OEI</i></font><...

Jump to post
by aerotech777
Sun Sep 02, 2012 8:50 pm
Forum: Technical/Operations
Topic: If All Engines Fail....
Replies: 30
Views: 8986

RE: If All Engines Fail....

Hi, I think the problem with all engines failure is when this event happens at low altitudes. Your ability to glide is very limited. You are very limited to trade altitude for the speed and sometimes you can’t glide. It can lead to serious incident/accident (US Airways flight 1549) or even crash. <a...

Jump to post
by aerotech777
Sat May 19, 2012 7:26 pm
Forum: Technical/Operations
Topic: Wind Additives And Landind Speed
Replies: 2
Views: 8122

Wind Additives And Landind Speed

Hi, a) Why you add wind additives such headwind and gust to Vref? b) Why you don’t subtract/add wind additives such tailwind and crosswind to Vref? It seems Boeing recommends bleeding off headwind additives approaching touchdown. c) How you can bleed off wind headwind additives approaching touchdown...

Jump to post
by aerotech777
Sun May 06, 2012 6:16 pm
Forum: Technical/Operations
Topic: Regular Descent Vs Steep Descent
Replies: 4
Views: 21963

Regular Descent Vs Steep Descent

Hi, a) What are the advantages and the disadvantages of these 2 descents? b) Is the angle of regular descent 3 degree (same as in approach)? c) What’s the angle of steep descent? Is there a limit for this angle? d) Is it possible to use steep descent in normal flight (no emergency descent)? e) Is it...

Jump to post
by aerotech777
Sat Apr 21, 2012 5:22 pm
Forum: Technical/Operations
Topic: B787-8 Takeoff Length Requirements
Replies: 44
Views: 30130

RE: B787-8 Takeoff Length Requirements

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/tdscanuck" class="quote" target="_blank">tdscanuck</a> (<a href="#20" class="quote">Reply 20</a>):<br/><i>With 70K engines you're MTOW limited</...

Jump to post
by aerotech777
Sun Jan 08, 2012 3:10 am
Forum: Technical/Operations
Topic: Could The A390 Be A Twin Engine A380 Replacement?
Replies: 22
Views: 17144

RE: Could The A390 Be A Twin Engine A380 Replacement?

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/prebennorholm" class="quote" target="_blank">prebennorholm</a> (<a href="#6" class="quote">Reply 6</a>):<br/><i>An A380 has 210 to 216 klb takeo...

Jump to post
by aerotech777
Sat Nov 26, 2011 6:59 pm
Forum: Technical/Operations
Topic: 777 With De-rated Engines
Replies: 23
Views: 10579

RE: 777 With De-rated Engines

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/tdscanuck" class="quote" target="_blank">tdscanuck</a> (<a href="#21" class="quote">Reply 21</a>):<br/><i>This is only true of older engines (us...

Jump to post
by aerotech777
Thu Nov 24, 2011 9:37 pm
Forum: Technical/Operations
Topic: 777 With De-rated Engines
Replies: 23
Views: 10579

RE: 777 With De-rated Engines

According to this website: <a href="http://www.b737.org.uk/assumedtemp.htm," target="_blank">http://www.b737.org.uk/assumedtemp.htm,</a> there are 2 types of derate: semi-parmanent derate and temporary derate known as "T/O De-rate. The semi-parmanent derate would require changes to the EEC, HMU, fue...

Jump to post
by aerotech777
Sun Nov 13, 2011 4:37 pm
Forum: Technical/Operations
Topic: Effects Of Takeoff Stabilizer Trim Setting
Replies: 16
Views: 9828

RE: Effects Of Takeoff Stabilizer Trim Setting

Thank you for your feedback. I get my quote from smartcockpit.com (Boeing presentation by Performance Engineer: Reduced Thrust Operations, page/slide 51). I thought there will be some changes in aircraft performance if more or less nose up trim is required. Here a quote from another forum Quote: "Ae...

Jump to post
by aerotech777
Sun Nov 13, 2011 6:03 am
Forum: Technical/Operations
Topic: Effects Of Takeoff Stabilizer Trim Setting
Replies: 16
Views: 9828

RE: Effects Of Takeoff Stabilizer Trim Setting

To clarify my question, I am asking for the effects of takeoff stabilizer trim setting on aircraft performance when using reduced thrust (assumed or derated) versus max takeoff thrust.

Feedback appreciated.

Jump to post
  • 1
  • 2