Last Saturday at work was one for those days that you never forget. From the moment we clocked in we were busy. There were planes to move and a grounded plane that needed the turbo-fan boot replaced. The lead got all the remoters assigned and I volunteered to change the turbo-fan boot. I've R&R'd turbo-fans before so I remember monkeying around with the boot. The part came in from Phoenix around 630 am so I picked it up and hopped into my golf cart for a nice morning drive out to Tango. On the way out there I noticed that one of the other day shift mechanics was following me out. I figured he was just driving to his remote plane so I thought nothing of it.
Once I got to the plane the other mechanic, I'll call him Banyan, drove up. I asked him if he was supposed to remote the plane I was working on but he said that he was just checking out the turbo-fan boot thing. The turbo-fan boot is a flexible duct that gets installed between the turbo-fan and the exhaust duct towards the aft of the airconditioning bay. The boot is held in by two large clamps, one on each side. sounds easy enough. As I started to install the new boot I put the clamp on the aft exhaust duct and then tried to put the forward clamp on. The problem was that I needed to pull the boot forward while positioning the clamp and at the same time tightening the clamp. Long story short Banyan was there and was able to pull the duct forward while I positioned and tightened the clamp.
The next thing was a gate call for an engine bleed trip. The Lead Mechanic, lets call him-Shooter, rode out there with me. We got permission from MX Control to lock out the bleed air system on the #2 engine. I grabbed the core-cowl pump before we left and we had that thing open, the PRSOV locked out, and the engine closed in about 7-8 minutes. The paper work took longer than the actual work.
That Saturday we had a plane with a DEU problem that required mechanic in the office to look up fault codes, a FO seat that had issues, and all the normal Saturday day shift calls (oils, hydraulics, radio issues, window washes, coffee makers, passenger seat problems). The day was simply humming with work.
The last example I will share from that day was a hydraulic leak. The FO did his walk around and found a hydro leak in the right wheel well. Four of us went to check it out, myself, Shooter, Banyan, and another mechanic-El Gato. The wheel well was a fog of hydro fluid. El Gato was trying to find the leak but the fluid getting into his eyes and lungs kept driving him out of the wheel well. The stores clerk brought out eye protection and a mask for him while he and Banyan continued to search out the pin hole leak. Any time there is hyd. fog like that the leak is a pin hole or very small crack in a component or line. Shooter went upstairs to switch the pump on and off and I was relaying when to do that on the radio. Once they found the leak El Gato started to take the line apart and Banyan went to get the temp-line kit. I went to get some gray tubs for the dripping fluid to go into instead of just letting it go all over the ground.
El Gato and Banyan had the line out and the new temp-line in while Shooter did the paperwork and I cleaned up and just helped out by handing tools to them etc. We took maybe an hour total hit on the plane but it was done and done right.
All of the above happened before noon. In the 5 \1/2 hours from 6:30 to 12 we worked all those issues and worked together often with out the need to ask for help or even the need to verbally communicate between us. The teamwork that was displayed was amazing. One mechanic knew what to do and others knew if he needed help doing it. If he went upstairs I stayed down stairs to do what needed to be done. If he is going to remove, whatever, he's going to need this tool or that tool so I better grab it.
The foremen recently asked all of us how to improve the teamwork here at OAK. I'm starting to believe that teamwork comes naturally to some. The thing about last Saturday and the guys working is that they have worked together for a while now, some even before starting at SWA. These guys know how to work and how to work together. Banyan knew that he did not have to ride out to Tango in the morning to "check out the turbo-fan boot". He also knew that, while the job could be done by one guy, the job would be done quicker if that one guy had a hand at the crucial last clamp!
Are these things that can be taught? Remember that in order to learn one has to be willing to be taught! The work of teamwork is that teamwork works, but only if you have the right team.
Showing posts with label bleed air. Show all posts
Showing posts with label bleed air. Show all posts
Wednesday, August 17, 2011
Tuesday, May 11, 2010
You Want It When???
While I was at work the other day a call came from Maintenance Control. There was a plane headed our way with a #1 engine bleed air issue. We get calls like this all the time and so it was not all that uncommon to have them request that we check it out. The problem came about when they said we HAD to have it fixed in two hours to make a flight to Midway.
A quick check of the history on the #1 engine bleed air system revealed that it had a 45 day history of problems! In other words this bleed air system has been acting up for over a month now and they wanted it fixed in two hours. I thought it was pretty ballsy of them to say we had to get it done, and I let the lead know how I felt about it. Luckily that day we had a guy on shift who is really good with engines and engine systems. He was able to figure out what was wrong and kick the plane out in about an hour and a half. Anyone who has worked on engine bleed air faults knows that often times multiple high power runs are required to narrow down and fix a problem.
Part of the issue is that the 737-700 is using the same bleed air valves and regulators as the 737-300 series. These valves seem to work well on the -300 engines (CFM-56-3) and are pretty reliable. These same components are not very reliable on the -700 engines (CFM-56-7). Boeing has not figured out why this is so, or at least they are not saying publicly why this is so. Through the grapevine we have heard that the -700 engines put out a different harmonic vibration than the older engines and this small vib is playing havoc with the components. Whatever it is they are still working on a fix!
More troubling is the "you have to get it fixed" statement. There is no way that I have to fix anything in an allotted time period. Make sure that you as a mechanic do not fall into this trap. Pressure is part of the job as I have mentioned before, however, when a component has a bunch of history, going back a lot of days, with a lot of different mechanics and parts thrown at it, proceed with caution. Do not let Maint. Ctrl or any one tell you how quickly you should work. In my example it all worked out fine but it could have easily gone the other way with the plane grounded and not leaving until the next morning. Thank God we had Dark Cloud there to work it (yes that is what we call him).
A quick check of the history on the #1 engine bleed air system revealed that it had a 45 day history of problems! In other words this bleed air system has been acting up for over a month now and they wanted it fixed in two hours. I thought it was pretty ballsy of them to say we had to get it done, and I let the lead know how I felt about it. Luckily that day we had a guy on shift who is really good with engines and engine systems. He was able to figure out what was wrong and kick the plane out in about an hour and a half. Anyone who has worked on engine bleed air faults knows that often times multiple high power runs are required to narrow down and fix a problem.
Part of the issue is that the 737-700 is using the same bleed air valves and regulators as the 737-300 series. These valves seem to work well on the -300 engines (CFM-56-3) and are pretty reliable. These same components are not very reliable on the -700 engines (CFM-56-7). Boeing has not figured out why this is so, or at least they are not saying publicly why this is so. Through the grapevine we have heard that the -700 engines put out a different harmonic vibration than the older engines and this small vib is playing havoc with the components. Whatever it is they are still working on a fix!
More troubling is the "you have to get it fixed" statement. There is no way that I have to fix anything in an allotted time period. Make sure that you as a mechanic do not fall into this trap. Pressure is part of the job as I have mentioned before, however, when a component has a bunch of history, going back a lot of days, with a lot of different mechanics and parts thrown at it, proceed with caution. Do not let Maint. Ctrl or any one tell you how quickly you should work. In my example it all worked out fine but it could have easily gone the other way with the plane grounded and not leaving until the next morning. Thank God we had Dark Cloud there to work it (yes that is what we call him).
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