Tool of the day
01-07-2014 | 06:51 PM
#4731
Gets Weekends Off
Joined: Jul 2007
Posts: 818
Likes: 0
From: FDX 767 FO
The actual number is 200#. The rest is overage and is funneled to cover cost of Area 51.
01-07-2014 | 08:28 PM
#4732
Line Holder
Joined: Sep 2008
Posts: 1,909
Likes: 7
From: B767
I guess you need to know the guy.....he used to be a Check Airman. Most pilots hold those guys to a higher standard. He gave me OE on another aircraft, and was worthless. Lack of standardization, attention to detail, etc.
Last month, he gave me an aircraft with a huge maintenance issue, only to say that it's my problem. He was going to the hotel.
The same behavior pattern seems to be in play here.
Last month, he gave me an aircraft with a huge maintenance issue, only to say that it's my problem. He was going to the hotel.
The same behavior pattern seems to be in play here.
01-07-2014 | 10:09 PM
#4733
Gets Weekends Off
Joined: Jul 2010
Posts: 12,836
Likes: 175
From: window seat
01-07-2014 | 10:37 PM
#4734
Da Hudge
Joined: Oct 2006
Posts: 17,473
Likes: 0
From: Poodle Whisperer
01-07-2014 | 10:55 PM
#4735
Gets Weekends Off
Joined: Sep 2008
Posts: 6,971
Likes: 0
From: Kickin’ Back
Denny
01-07-2014 | 11:24 PM
#4736
New boss = Old boss
Joined: Mar 2005
Posts: 2,763
Likes: 1
From: Ca B737
"A single pack must work harder than two packs to cool the cabin to a given temperature. Hence the APU must supply higher bleed air pressures to assure proper environmental control system operation. This higher pressure requires a greater Inlet Guide Vane (IGV) open position than that required for 2–pack operation. Since there is less airflow required to operate 1–pack than is needed, a significant amount of unused bleed air is exhausted through the Surge Control Valve (SCV). This higher IGV open position and large quantity of unused air translates into higher APU fuel burn and higher EGTs during 1–pack operation. Also, the high airflow levels exhausting through the surge control valve increases the overall APU generated noise by 2dbA. With 2 packs supplying the cabin cooling requirements the pressure requirement is lower, resulting in lower turbine inlet temperatures, EGTs and far less unused air being discharged through the surge valve."
01-07-2014 | 11:38 PM
#4737
Gets Weekends Off
Joined: Sep 2008
Posts: 6,971
Likes: 0
From: Kickin’ Back
I know. Not intuitive but true. Here is the paragraph from the 737 Technical site that explains it.
"A single pack must work harder than two packs to cool the cabin to a given temperature. Hence the APU must supply higher bleed air pressures to assure proper environmental control system operation. This higher pressure requires a greater Inlet Guide Vane (IGV) open position than that required for 2–pack operation. Since there is less airflow required to operate 1–pack than is needed, a significant amount of unused bleed air is exhausted through the Surge Control Valve (SCV). This higher IGV open position and large quantity of unused air translates into higher APU fuel burn and higher EGTs during 1–pack operation. Also, the high airflow levels exhausting through the surge control valve increases the overall APU generated noise by 2dbA. With 2 packs supplying the cabin cooling requirements the pressure requirement is lower, resulting in lower turbine inlet temperatures, EGTs and far less unused air being discharged through the surge valve."
"A single pack must work harder than two packs to cool the cabin to a given temperature. Hence the APU must supply higher bleed air pressures to assure proper environmental control system operation. This higher pressure requires a greater Inlet Guide Vane (IGV) open position than that required for 2–pack operation. Since there is less airflow required to operate 1–pack than is needed, a significant amount of unused bleed air is exhausted through the Surge Control Valve (SCV). This higher IGV open position and large quantity of unused air translates into higher APU fuel burn and higher EGTs during 1–pack operation. Also, the high airflow levels exhausting through the surge control valve increases the overall APU generated noise by 2dbA. With 2 packs supplying the cabin cooling requirements the pressure requirement is lower, resulting in lower turbine inlet temperatures, EGTs and far less unused air being discharged through the surge valve."
Denny
01-07-2014 | 11:57 PM
#4738
Da Hudge
Joined: Oct 2006
Posts: 17,473
Likes: 0
From: Poodle Whisperer
I know. Not intuitive but true. Here is the paragraph from the 737 Technical site that explains it.
"A single pack must work harder than two packs to cool the cabin to a given temperature. Hence the APU must supply higher bleed air pressures to assure proper environmental control system operation. This higher pressure requires a greater Inlet Guide Vane (IGV) open position than that required for 2–pack operation. Since there is less airflow required to operate 1–pack than is needed, a significant amount of unused bleed air is exhausted through the Surge Control Valve (SCV). This higher IGV open position and large quantity of unused air translates into higher APU fuel burn and higher EGTs during 1–pack operation. Also, the high airflow levels exhausting through the surge control valve increases the overall APU generated noise by 2dbA. With 2 packs supplying the cabin cooling requirements the pressure requirement is lower, resulting in lower turbine inlet temperatures, EGTs and far less unused air being discharged through the surge valve."
"A single pack must work harder than two packs to cool the cabin to a given temperature. Hence the APU must supply higher bleed air pressures to assure proper environmental control system operation. This higher pressure requires a greater Inlet Guide Vane (IGV) open position than that required for 2–pack operation. Since there is less airflow required to operate 1–pack than is needed, a significant amount of unused bleed air is exhausted through the Surge Control Valve (SCV). This higher IGV open position and large quantity of unused air translates into higher APU fuel burn and higher EGTs during 1–pack operation. Also, the high airflow levels exhausting through the surge control valve increases the overall APU generated noise by 2dbA. With 2 packs supplying the cabin cooling requirements the pressure requirement is lower, resulting in lower turbine inlet temperatures, EGTs and far less unused air being discharged through the surge valve."
Give me a 757 or 320 any day of the week, please!
01-08-2014 | 05:26 AM
#4740
Gets Weekends Off
Joined: Apr 2008
Posts: 791
Likes: 0
From: 767A
Not always FAs. 1 hour+ to push, 40 degrees F outside, sun shining on him so he's a little warm. Cranks the APU. I shut it down, told him to crack his window.
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