Southwest Airlines 737 skin failure | FerrariChat

Southwest Airlines 737 skin failure

Discussion in 'Aviation Chat' started by Bob Parks, Jul 14, 2009.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. Bob Parks

    Bob Parks F1 Veteran
    Consultant

    Nov 29, 2003
    8,017
    Shoreline,Washington
    Full Name:
    Robert Parks
    Just a note to point out that the the fuselage structure that incorporated a tear-stopper design worked to perfection in this case. The failure was localized and the NTSB wonks will be able to analyze it and everybody went home today. I have no idea how many cycles this aircraft had on the books but at 15 years of age I would bet that there were quite a few. I'll fly Boeing any day. This is a non event in my mind.
    Switches
     
  2. Ney

    Ney F1 Veteran
    Silver Subscribed

    Apr 20, 2004
    7,378
    I just booked a last minute flight. Had my choice of three flights, two were by Airbus, one by Boeing. I chose the Boeing even though it was not the best time. I don't play the lotto, but I like my odds with the Boeing flight.
     
  3. jknight

    jknight F1 Veteran

    Oct 30, 2004
    7,821
    Central Texas
    Headed to Lisbon in a couple weeks for LMS race at the new Algarve circuit - on several airbus flights and a couple 737's; have been on many airbus flights since Barcelona race in April and will be on them again thru the end of the year - don't even give it a second thought - best connection for us - better flight times, prefer the foreign flights vs american based airlines and crewed flights (some of the attendents are well past their used by date and attitude shows that, food and service leaves alot to be desired). Suffice to say, I am not paranoid about it.

    Carol
     
  4. beast

    beast F1 World Champ

    May 31, 2003
    11,479
    Lewisville, TX
    Full Name:
    Rob Guess
    I really cannot understand the Airbus Vs. Boeing bashing that exists today. I have flown on both Airbus and Boeing products and I feel safe in both of them. The main concern I have is flying on certain carriers. right on top of my list of Airlines that I refuse happens to be Southwest. The main reason is when ever I have flown with them they always seemed to be in a hurry and the flight attendants seen to care less about passenger comfort and safety.

    Now back on topic I wonder how many actual flight cycles this airframe encountered during its life at Southwest.

    http://www.flightglobal.com/articles/2009/07/14/329609/picture-southwest-inspects-737-300s-after-jet-badly-holed-in-flight.html
     
  5. Bob Parks

    Bob Parks F1 Veteran
    Consultant

    Nov 29, 2003
    8,017
    Shoreline,Washington
    Full Name:
    Robert Parks
    #5 Bob Parks, Jul 14, 2009
    Last edited: Jul 14, 2009
    The 737 dispatch rate is unmatched in the airline industry. It is a turnkey airplane. Attitudes of flight attendants have no bearing on the reliability and structural integrity of the airplane. I'm sure that Airbus is close to being reliable as the 737 but there are some issues that demand resolution.
    Switches
     
  6. MarkPDX

    MarkPDX F1 World Champ
    Lifetime Rossa

    Apr 21, 2003
    15,111
    Gulf Coast
    #6 MarkPDX, Jul 14, 2009
    Last edited: Jul 14, 2009
    What is the hours of maintenance / flight hours ratio like on a 737?

    Also curious how many cycles/hours a 737 might be good for? Are hours all the same for airliners? In my world equivalent baseline hours are tracked and some types of flying, tactical low level for instance, has a multiplier to account for the increased stress on the aircraft.
     
  7. beast

    beast F1 World Champ

    May 31, 2003
    11,479
    Lewisville, TX
    Full Name:
    Rob Guess
    Bob,

    Not doubting the reliability of the 737. What I am more concerned with is how many flight cycles this airframe had considering that Southwest does a lot of short hops.

    For Example SWA115 is scheduled for tomorrow

    KPHX - KLAS 50 min flight
    KLAS - KSLC 1 hour flight
    KSLC - KSTL 2 hour 30 mins
    KSTL - KDTW 1 hour 15 mins

    http://flightaware.com/live/flight/SWA115/history/20090715/1412Z/KPHX/KLAS

    It departs Phoenix at 7:12am MST and is scheduled to land in Detroit at 5:44 pm EST so there is a possibility that this A/C could get in another 2 flights in a day. That would make for 6 pressurization cycles in 1 day.

    Now take a look at 6 cycles a day 300 days a year for 15 years and we have 27,000 cycles for about almost the same amount of flight hours. While not nearly as many cycles of Aloha 243 it does make you wonder how many more are ready to pop open??
     
  8. Bob Parks

    Bob Parks F1 Veteran
    Consultant

    Nov 29, 2003
    8,017
    Shoreline,Washington
    Full Name:
    Robert Parks
    Forgive me if I got a bit forceful in my comments. I don't like the treatment we get on the airlines either, I'm just looking at the airplane. The Aloha airplane had severe pillowing at the rivets that showed serious corrosion that should have been detected before the upper lobe departed. A maintenance issue. It should be noted that the lower fuselage had just had the skins replaced and THAT is what kept the whole thing together after the upper fuselage failed and that is testament to the good structural design of the airplane again. I imagine that the Southwest airplane had a huge number of cycles and you are probably correct in your estimates. Those airplanes because of their dispatch reliability are flown continuously and hop-scotch their way through life until they give a sign at some point that they are getting tired. This is the same type of thing that happened to the Comet but it unzipped and popped like a balloon.
    Switches
     
  9. beast

    beast F1 World Champ

    May 31, 2003
    11,479
    Lewisville, TX
    Full Name:
    Rob Guess
    Not a problem Bob,

    The biggest problem I have with Southwest is the fact that when I have contact with there crews they have always come across as cocky and care less attitude. The last couple of times I flew on them one flight from from Phoenix to Vegas I noticed one wing access panel was missing several fasteners. When i drought it to the flight crews attention the Capt. upon arrival he remarked. "That is the least of the Maint. worries I have for this last flight!"

    And another flight from San Jose to Phoenix The flight was full and my seat belt did not latch securely. When I brought it to the attention of the flight attendants she looked at me and asked "Do you want me to make an announcement and see if i can get someone to switch seats with you??" I decided to get off the aircraft booked a flight on United the next morning out of San Francisco.

    That was the last time I ever flew on them.

    And lets not forget the FAA fine concerning inspections of 737-300/500 fuselages for cracks levied on Southwest.

    http://www.dallasnews.com/sharedcontent/dws/bus/stories/DN-southwest_07bus.ART.State.Edition2.1d31ae1.html
     
  10. Bas

    Bas Four Time F1 World Champ

    Mar 24, 2008
    42,772
    ESP
    Full Name:
    Bas
    I have flown plenty on both aircraft.

    Next month however, I'm flying to Africa (rwanda to be precise). Please excuse me for pinching it a little:).
     
  11. beast

    beast F1 World Champ

    May 31, 2003
    11,479
    Lewisville, TX
    Full Name:
    Rob Guess
  12. Bob Parks

    Bob Parks F1 Veteran
    Consultant

    Nov 29, 2003
    8,017
    Shoreline,Washington
    Full Name:
    Robert Parks
    To me that looks like a pressure cycle fatigue failure from the shape of the hole.
     
  13. beast

    beast F1 World Champ

    May 31, 2003
    11,479
    Lewisville, TX
    Full Name:
    Rob Guess
    Would have to agree 100% on that one.
     
  14. Jeff Kennedy

    Jeff Kennedy F1 Veteran
    Owner Silver Subscribed

    Oct 16, 2007
    6,848
    Edwardsville, IL
    Full Name:
    Jeff Kennedy
    Regarding Southwest flight hours and cycles - it was true a while back that Southwest replaced their aircraft much more frequently than other US airlines because of their quick cycle accumulation. They had determined that there was a point where keeping the aircraft longer would result in a rapid resale value. Since they have historically been profitable they could afford to have such practices.

    Jeff
     
  15. Vegas_Spider

    Vegas_Spider Rookie

    Dec 27, 2008
    45
    #15 Vegas_Spider, Jul 19, 2009
    Last edited by a moderator: Sep 7, 2017
    I am sorry you ran across a Crew that was indifferent. That is very uncommon for Southwest. We have always been had a much stronger reputation for being friendly

    and caring. This is indisputable. Again, the crew you ran across has no excuse for treating you like that and if I could apologize for them, I would. One note on the

    amount of cycles on the 737; Our inspections are in line with the cycles on the airframes. i.e.; the more cycles, the more inspections. As far as the Boeing vs the

    Airbus debate. Well, both products are engineered beyond what is expected. failures are uncommon and usually a result of multiple reasons. I have flown Douglas

    products as well and the DC-10 / MD-11 line is cause for concern. The 747 I flew is a superb product and a joy to fly.

    SWA 737 Captain.
    Image Unavailable, Please Login
     
  16. Bob Parks

    Bob Parks F1 Veteran
    Consultant

    Nov 29, 2003
    8,017
    Shoreline,Washington
    Full Name:
    Robert Parks
    I learned over the weekend that there is an AD on the 737 to repair the area that failed on the SWA airplane. It is one of those AD's with a wide window allowed to make the fix.
    Switches
     
  17. beast

    beast F1 World Champ

    May 31, 2003
    11,479
    Lewisville, TX
    Full Name:
    Rob Guess
    looks like there are a couple of AD's that deal with the fuselage skin of the 737-300/400/500 models

    http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/caf4bba41d5697bb86257593004baa4f/$FILE/2009-07-11.pdf

    http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/ec7e9a8669b50a5e862574d50047db96/$FILE/2008-19-03.pdf
     
  18. beast

    beast F1 World Champ

    May 31, 2003
    11,479
    Lewisville, TX
    Full Name:
    Rob Guess

Share This Page