(c)
Emergency Escape Doors
(d)
Galley Service Doors
B. Equipment
(1)
ST6760A-1, Ultrasonic Leak Probe Tool
(2)
ST9999-VBA-201, Vacuum Generator (No. 2 window, door and hatch)
(3)
ST9999-VB, Door and Hatch Vacuum Blanket
C. References
(1)
AMM 52-11-00/501, Forward Entry Door
(2)
AMM 52-13-00/501, Aft Entry Door
(3)
AMM 52-21-00/501, Emergency Escape Hatches
(4)
AMM 52-41-00/501, Galley Service Doors
D. Access
(1) Location Zone
105 Forward Entry Door
106 Forward Galley Service Door
110 Aft Entry Door
112 Aft Galley Service Door
117 Left Emergency Escape Hatch
166 Right Emergency Escape Hatch
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737-300/400/500MAINTENANCE MANUAL
E. Procedure
S 846-012-B00
(1) Do the steps that follow to prepare the vacuum blanket:
(a)
Calibrate the ultrasonic leak detector as follows:
1) Use the white noise generator to set the PASS/FAIL indication to 40dB.
(b)
Connect the vacuum generator to the vacuum blanket.
(c)
Connect the vacuum generator to a compressed air source.
S 486-013-B00
(2) Install the vacuum blanket over the exterior of the Forward Entry Door, Aft Entry Door, Galley Service Doors, or the Emergency Escape Hatches (Fig. 602).
(a)
Make sure the vacuum blanket covers the entire exterior of the door or hatch and the gap between the door or hatch and the fuselage.
(b)
Remove all bubbles and creases.
(c)
Make sure the vacuum gauge indicates 18 to 20 inches (HG) of vacuum when the blanket is attached to the door or hatch.
S 276-014-B00
(3) Do a check of the noise levels around the interior of the door or hatch that you test as follows:
(a)
Hold the ultrasonic leak detector approximately 2 inches from the door or hatch.
(b)
Move the ultrasonic leak detector around the edge of the door or hatch.
(c)
Use the headphones and watch the noise meter on the ultrasonic leak detector.
S 816-015-B00
(4) If the noise levels are more than ed 40dB do the steps that follow:
(a)
Determine the exact location of the noise with a stethoscope.
(b)
Remove the vacuum blanket from the door or hatch.
(c)
Make sure the door seal or hatch seal is clean and in good condition; free from wrinkles, kinks, cracks, rips, tears, etc.
(d)
Make sure the door seal does not have wrinkles, kinks, cracks, rips, tears, or any other damage. 1) Replace the door seal or hatch seal if you find wrinkles,
kinks, cracks, rips, tears, or other types of damage (AMM 52-09-13/401).
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A 737-300/400/500MAINTENANCE MANUAL
(e) Install the vacuum blanket again and check for leaks.
(f) (g) NOTE: You will have to repeat the installation of the vaccum____ blanket and do a check for leaks to make sure all the leaks have been corrected.If the seal does not need to be replaced do the step that follows:Do the applicable door or hatch adjustments:
- AMM 52-11-00/501, Forward Entry Door - AMM 52-13-00/501, Aft Entry Door - AMM 52-21-00/501, Emergency Escape Hatches - AMM 52-41-00/501, Galley Service Doors
(h) Install the vacuum blanket again and check for leaks.
NOTE:____ You will have to repeat the installation of the vaccum blanket and do a check for leaks to make sure all the leaks have been corrected.
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