737 Trim Air
08-03-2014, 02:57 PM
#1
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Thread Starter
Joined APC: Mar 2005
Position: Ca B737
Posts: 2,762
737 Trim Air
We never turn trim air off on our 737s that have trim air. I was told that AA turns off trim air in the ground. And recently I saw a photo of a Ryan Air 737 and they had their trim air off. Can someone enlighten me as to why one would not use trim air?
08-03-2014, 04:50 PM
#2
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Joined APC: Oct 2008
Position: JAFO- First Observer
Posts: 997
The 737-800s have had a lot of trim air faults in the early days. There is a Boeing FCOM Bulletin titled Nuisance Zone Temp Light Illuminations on 737-800 Airplanes. The procedure is as follows:
After landing, prior to first power transfer:
Trim Air Switch .. OFF
Air Conditioning System ____Pack(s), BLEEDS ON
Prior to takeoff, after last power transfer:
Trim Air Switch .. ON
After landing, prior to first power transfer:
Trim Air Switch .. OFF
Air Conditioning System ____Pack(s), BLEEDS ON
Prior to takeoff, after last power transfer:
Trim Air Switch .. ON
08-03-2014, 04:58 PM
#3
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Joined APC: Jun 2006
Position: 737 FO/Capt/FO
Posts: 427
Originally Posted by PerfInit
The 737-800s have had a lot of trim air faults in the early days. There is a Boeing FCOM Bulletin titled Nuisance Zone Temp Light Illuminations on 737-800 Airplanes. The procedure is as follows:
After landing, prior to first power transfer:
Trim Air Switch .. OFF
Air Conditioning System ____Pack(s), BLEEDS ON
Prior to takeoff, after last power transfer:
Trim Air Switch .. ON
After landing, prior to first power transfer:
Trim Air Switch .. OFF
Air Conditioning System ____Pack(s), BLEEDS ON
Prior to takeoff, after last power transfer:
Trim Air Switch .. ON
We follow the above procedure as well on our 800s
08-04-2014, 01:19 PM
#4
New boss = Old boss
Thread Starter
Joined APC: Mar 2005
Position: Ca B737
Posts: 2,762
Originally Posted by PerfInit
The 737-800s have had a lot of trim air faults in the early days. There is a Boeing FCOM Bulletin titled Nuisance Zone Temp Light Illuminations on 737-800 Airplanes. The procedure is as follows:
After landing, prior to first power transfer:
Trim Air Switch .. OFF
Air Conditioning System ____Pack(s), BLEEDS ON
Prior to takeoff, after last power transfer:
Trim Air Switch .. ON
After landing, prior to first power transfer:
Trim Air Switch .. OFF
Air Conditioning System ____Pack(s), BLEEDS ON
Prior to takeoff, after last power transfer:
Trim Air Switch .. ON
Procedures that have no basis in reality or are unnecessary annoy me.
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