(a)
If it is not removed, remove the bolt and nut which attach the tube clamp for the scupper drain to the support bracket.
(b)
Remove the bolts, washers, and nuts which attach the support bracket to the flange N bracket.
(c)
Remove the support bracket.
(d)
Remove the bolts and nuts which attach the bridge brackets for the LPT tube to the flange N bracket.
(e)
Remove the bolts and nuts which attach the bracket to the flange N.
(f)
Remove the bracket.
S 014-034-N00
(20)
For the lower aft cooling air tube, remove the support bracket for the support tube of the fire detector element on the flange N bracket at approximately the 8 o'clock position with the steps that follow (view J):
(a)
Remove the bolts and washers which attach the support bracket for the fire detector wire bundle to the support bracket.
(b)
Remove the bolts and washers which attach the support bracket to the flange N bracket.
(c)
Remove the support bracket.
S 014-036-N00
(21)
For the lower aft cooling air tube, remove the flange N bracket at approximately the 5:30 o'clock position with the steps that follow (view L):
(a)
Remove the bolts, washers, and nuts which attach the support bracket for the support tube of the fire detector element to the flange N bracket.
(b)
Remove the support bracket.
(c)
Remove the bolts and nuts which attach the bridge bracket of the LPT tube to the flange N bracket.
(d)
Remove the bolts and nuts which attach the bracket to the flange N.
(e)
Remove the bracket.
S 014-116-N00
(22)
For the upper aft cooling air tube, remove the flange N brackets at the 1:30 and 11:30 o'clock positions (view D) with the steps that follow:
(a)
Remove the bolts and nuts which attach the bridge brackets for the LPT tube to the flange N bracket.
(b)
Remove the bolts which attach the bracket to the flange N.
(c)
Remove the bracket.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-24-07
ALL ú ú N01 Page 418 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 024-135-N00
(23) For the aft cooling air tube, remove the brackets which attach the tube clamps for the aft cooling air tube with the steps that follow:
(a)
If it is not removed, remove the bolt and nut which attach the tube clamp for the cooling air tube to the bracket on the flange N bracket.
(b)
Remove the bolt and nut which attach the bracket to the flange N bracket.
S 024-136-N00
(24)
For the forward cooling air tube, remove the bolt and nut which attach the tube clamp to the bracket on the flange M bracket at three locations.
S 024-137-N00
(25)
For the center cooling air tubes, remove the applicable bridge bracket for the HPT cooling air tube with the steps that follow:
(a)
If it is not removed, remove the bolts which attach the two tube clamps for the cooling air tube to the bridge bracket for the HPT cooling air tube.
(b)
Remove the bolts which attach the applicable bridge bracket for the HPT cooling air tube to the flange M and flange N brackets.
(c)
Remove the bridge bracket.
S 024-120-N00
(26)
Remove the bolt which attaches the cooling air tube to the HP TCC collector.
S 024-042-N00
(27)
Remove the cooling air tube from the engine.
NOTE: Remove the upper aft center cooling air tube before you
____ remove the upper forward center cooling air tube.
S 024-121-N00
(28) Install the protection caps to the openings of the cooling air tube and HP TCC collector.
TASK 75-24-07-404-044-N00
3. Install the High Pressure Turbine Case Cooling Manifolds (Fig. 401)
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本文链接地址：747-400 AMM 飞机维护手册 大气 AIR 1(83)
