B737-112 From United States of America, joined Nov 1999, 891 posts, RR: 5 Posted (3 years 1 month 1 day 15 hours ago) and read 6608 times:
If you go to about the 5:30 mark of the attached video, you'll see what appears to be a plume of smoke come out of the top of the Boeing 727's wing. If anybody has any insight as to why this would happen, please let me know.
nutsaboutplanes From United States of America, joined Jul 2010, 510 posts, RR: 8
Reply 4, posted (3 years 1 month 1 day 15 hours ago) and read 6548 times:
Here is something that I found that you might be interested in. While I worked at NW, there were several instances where evacutations were initiated by passenger onboard the 727 due to "APU torchngs". This link talks a bit about the spectacle and my understanding is that it can light up a dark cabin at night.
Tomassjc From United States of America, joined Jan 2010, 908 posts, RR: 2
Reply 6, posted (3 years 1 month 1 day 3 hours ago) and read 5656 times:
Quoting nutsaboutplanes (Reply 4): While I worked at NW, there were several instances where evacutations were initiated by passenger onboard the 727 due to "APU torchngs".
We had 2 such instances with the 727-264 when I worked at MX. One at LAX, when the aircraft was clearing the runway and the "U-pa" (APU in Spanish) was fired up, pax seated on the starboard side initiated an evacuation after seeing a flame shoot out of the APU exhaust. Fortunately the flight attendants knew what was going on and got everyone under control.
The second one on taxi in at SFO in the early 80s (In the alley between the original international terminal and the old WA gates) resulted in a full evacuation through the L1 door by a not so savvy crew. I vaguely remember piles of shoes in the forward galley and walking passengers to customs in their stocking feet. Talk about embarrassing!
When once you have tasted flight, you will forever walk the Earth with your eyes turned skyward -Leonardo DaVinci
maxpower1954 From United States of America, joined Sep 2008, 1159 posts, RR: 7
Reply 7, posted (3 years 1 month 1 day 1 hour ago) and read 5478 times:
During the original design period of the 727, small gas turbine APUs were still impractical. Late in the development phase, Garrett perfected one, but the 727 design was already frozen. So the APU was located in the left wheel well area, with the APU exhaust on the top of the left wing. BTW, the APU cannot be used in flight on the 727 because of this location.
737tdi From United States of America, joined Sep 2007, 933 posts, RR: 2
Reply 13, posted (3 years 1 month 3 hours ago) and read 3906 times:
Quoting n901wa (Reply 11): Man I remember changing the 727 APU. Here's a photo I took back when, that shows the exhaust and half of the APU in the RT Main W/W, looking fwd in a WAL 727-247. The Oil tank is right below the duct.
WAL 727-200 WW
Thanks for that pic. Wow that brings back some old memories. I worked on Fed-X 727s at the old Dalfort MRO and removed and installed a few APUs. That is an awfully clean wheelwell. Usually never see them that clean. I work strictly 737s now.