ATA 25 Equipment & Furnishing
1 - Cargo compartment blanket layout, to be used during heavy maintenance. 737-300/400
2 - Rudder pedal adjustment handle stuck. 737-3/4/500
3 - Cargo/door tresholds >> Removal of safety walk tape 737-ALL
4 - High squeezing sounds when walking in aft part of cabin. 737-6/7/8/900
5 - New SKY interior LED lighting introduced. 737-6/7/8/900
6 - Soaked insulation blankets causing ice on sidewalls. 737-6/7/8/900
The handle to operate the rudder
pedals fwd or aft can be stuck at the end of its stop. This frequently arouses
the idea that there is something wrong. Often when the rudder pedal is at it's extreme forward or aft position the design feature of the
pedals is in such a way that it gets locked. If you apply a considerably
force on the handle the mechanism comes loose. However, pay attention you turn
it the correct way. So just rotate the adjustment lever with a little more force you may hear a little latch breaking sound then the pedal becomes free to move fore and aft. Update from Tom: Rudder pedal adjustment jammed full
travel fore or aft: Reference 400 amm 27-21-00/101 troubleshooting. (not in
NG manuals!) These jackscrew units are all the same in the fleet, This t/s
guide recommends backdriving the adjustment crank up to 100 in/lbs, it may
actually take more, using adjustable wrench on flats opposite crank knob
turn CW to drive pedals forward CCW to drive pedals aft. Light tapping on
jackscrew at same time also helps.
To remove the safety-walk tape on all
tresholds and the aft floorpanel of the aft cargo compartment, it is wise to use
hot water. The removal is then very easy.
When walking at row 22 (last 4-5 seatrows in the
cabin) and
further backwards in the cabin, you may hear some high pitch squeezing sounds, like the
sound when you step on a mouse (a real one). This is caused by the springloaded
pins which protrude into the floorstructure (metal against metal movement), in
the aft cargo compartment. Here are vertical support assies on which the panels
are mounted around the waste tank. To eliminate the sounds, lubricate these pins
a little with some WD40 or grease. To do this the panels have to be removed
first. See photos below for exact location.
Recently, a new 737NG aircraft was
delivered with the new SKY interior, which has LED lighting in the cabin. The
lighting can be set in different colors and configurations during different
flight moments, like boarding, takeoff, cruise, meals, night etc. The control
panel is a touch-screen device in the fwd galley. Also the sidewalls and
luggage-bins are very different as well as the PSU panels. See the pictures
below or download the zip-file on the
pictures page of this site.
On the next gen 737 it happens often that passengers are
complaining about cold and sometimes iced sidewall panels at a few seatrows aft
of the emergency exits. We found this on several 737-NG aircraft and discovered
that the insulation blankets where soaked with water/moisture, causing them to
freeze and conducting the cold from outside to the inside and sidewalls. The
blankets showed a porous edge at the upper edge of the blanket which is
positioned at the lower edge of the window assy. These wet blankets are not able to dry because there is no
airflow or ventilation in that area, between station 685 and 727, covering 2
window frames wide. The missing ventilation is caused by the strengthened
construction at that point because of the landing gear being positioned
underneath. Also the air return grills are missing, only closed panels are
installed on that spot. The only solution we have is to replace the wet blankets, or
repair them and making them more water-proof at that area using blanket-repair
tape. See the pictures below showing examples of the area and the wet and
worn/porous blankets. The a/c on these pictures is almost 2 years old.
1-Cargo compartment
blanket layout.
737-3/400
4-High
squeezing sounds when walking in aft part of cabin.
5 -
New SKY interior LED
lighting introduced. 737-6/7/8/900
6 -
Soaked insulation
blankets causing ice on sidewalls. 737-6/7/8/900
