S 975-170
 (10)
 Make sure the air velocity is 150 feet per minute minimum at each orifice.

 S 975-324

 (11)
 Calculate zone 9 smoke sampling port velocity delta (PVD), use the following formula:

 PVD = maximum smoke sampling port velocity - minimum smoke sampling port velocity.
 S 975-325
 (12)
 Make sure zone 9 smoke sampling port velocity delta (PVD) do not exceed 100 feet per minute.

 S 975-171

 (13)
 Use a hot wire anemometer and adapter to examine the air velocity at each orifice in zone 10 of the main deck cargo compartment.

 -
STA 1504, RBL 3.0

 -
STA 1529, RBL 5.0

 -
STA 1553, RBL 3.0

 -
STA 1577, RBL 3.0

 -
STA 1592, RBL 3.0

 (14)
 Make sure the air velocity is 150 feet per minute at each orifice.

 S 975-326

 (15)
 Calculate zone 10 smoke sampling port velocity delta (PVD), use the following formula:

 S 975-172
 PVD = maximum smoke sampling port velocity - minimum smoke sampling port velocity.
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 ALL  ú ú 13 Page 524 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 975-327
 (16)
 Make sure zone 10 smoke sampling port velocity delta (PVD) do not exceed 100 feet per minute.

 S 975-173

 (17)
 Use a hot wire anemometer and adapter to examine the air velocity at each orifice in zone 11 of the main deck cargo compartment.

 -
STA 1635, RBL 26.0

 -
STA 1635, RBL 62.0

 -
STA 1697, RBL 3.0

 -
STA 1721, RBL 3.0

 -
STA 1745, RBL 7.0

 -
STA 1769, RBL 3.0

 S 975-174
 (18)
 Make sure the air velocity is 150 feet per minute minimum at each orifice.

 S 975-328

 (19)
 Calculate zone 11 smoke sampling port velocity delta (PVD), use the following formula:

 PVD = maximum smoke sampling port velocity - minimum smoke sampling port velocity.
 S 975-329
 (20)
 Make sure zone 11 smoke sampling port velocity delta (PVD) do not exceed 100 feet per minute.

 S 975-155

 (21)
 Use a hot wire anemometer and adapter to examine the air velocity at each orifice in zone 12 of the main deck cargo compartment.

 -
STA 1770, LBL 90.0

 -
STA 1808, LBL 66.2

 -
STA 1833.8, LBL 66.2

 -
STA 1866.3, LBL 66.2

 -
STA 1891.2, LBL 66.2

 -
STA 1930, LBL 90.9

 NOTE: Examine velocity in feet per minute.
____
 S 975-156
 (22) Make sure the air velocity is 150 feet per minute minimum at each orifice.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 26-14-00
 ALL  ú ú 13 Page 525 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 975-330
 (23) Calculate zone 12 smoke sampling port velocity delta (PVD), use the following formula:
 PVD = maximum smoke sampling port velocity - minimum smoke sampling port velocity.
 S 975-331
 (24)
 Make sure zone 12 smoke sampling port velocity delta (PVD) do not exceed 100 feet per minute.

 S 975-157

 (25)
 Use a hot wire anemometer and adapter to examine the air velocity at each orifice in zone 13 of the main deck cargo compartment.

 -
STA 1793, RBL 3.0

 -
STA 1817, RBL 7.0

 -
STA 1841, RBL 3.0

 -
STA 1865, RBL 3.0

 -
STA 1889, RBL 7.0

 -
STA 1913, RBL 3.0

 S 975-158
 (26)
 Make sure the air velocity is 150 feet per minute minimum at each orifice.

 S 975-332
　
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