26-14-00
 ALL  ú ú 13 Page 521 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 975-117
 (17)
 Make sure the air velocity is 150 feet per minute minimum at each orifice.

 S 975-316

 (18)
 Calculate zone 5 smoke sampling port velocity delta (PVD), use the following formula:

 PVD = maximum smoke sampling port velocity - minimum smoke sampling port velocity.
 S 975-317
 (19)
 Make sure zone 5 smoke sampling port velocity delta (PVD) do not exceed 100 feet per minute.

 S 975-215

 (20)
 Use a hot wire anemometer and adapter to examine the air velocity at each orifice in zone 6 of the main deck cargo compartment.

 -
STA 1015.5, RBL 3.0

 -
STA 1061.5, RBL 60.0

 -
STA 1061.5, RBL 3.0

 -
STA 1061.5, LBL 60.0

 -
STA 1138.5, RBL 3.0

 S 975-119
 (21)
 Make sure the air velocity is 150 feet per minute minimum at each orifice.

 S 975-318

 (22)
 Calculate zone 6 smoke sampling port velocity delta (PVD), use the following formula:

 PVD = maximum smoke sampling port velocity - minimum smoke sampling port velocity.
 S 975-319
 (23) Make sure zone 6 smoke sampling port velocity delta (PVD) do not exceed 100 feet per minute.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 26-14-00
 ALL  ú ú 13 Page 522 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 J. Smoke Sampling Port Air Flow Test (zones 7-16)
 S 975-165
 (1)  Use a hot wire anemometer and adapter to examine the air velocity at each orifice in zone 7 of the main deck cargo compartment.
 -
STA 1181.5, RBL 6.0

 -
STA 1181.5, RBL 3.0

 -
STA 1181.5, LBL 60.0

 -
STA 1226.5, RBL 3.0

 -
STA 1256.5, RBL 60.0

 -
STA 1256.5, LBL 60.0

 NOTE: Examine velocity in feet per minute.
____
 S 975-166
 (2)  
Make sure the air velocity is 150 feet per minute minimum at each orifice.

 S 975-320

 (3)  
Calculate zone 7 smoke sampling port velocity delta (PVD), use the following formula:

 PVD = maximum smoke sampling port velocity - minimum smoke sampling port velocity.
 S 975-321
 (4)  
Make sure zone 7 smoke sampling port velocity delta (PVD) do not exceed 100 feet per minute.

 S 975-167

 (5)  
Use a hot wire anemometer and adapter to examine the air velocity at each orifice in zone 8 of the main deck cargo compartment.

 -
STA 1261.5, RBL 3.0

 -
STA 1323.5, RBL 3.0

 -
STA 1361.5, RBL 60.0

 -
STA 1361.5, RBL 3.0

 -
STA 1361.5, LBL 60.0

 S 975-168
 (6)  
Make sure the air velocity is 150 feet per minute minimum at each orifice.

 S 975-322

 (7)  
Calculate zone 8 smoke sampling port velocity delta (PVD), use the following formula:

 PVD = maximum smoke sampling port velocity - minimum smoke sampling port velocity.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 26-14-00
 ALL  ú ú 13 Page 523 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 975-323
 (8)  
Make sure zone 8 smoke sampling port velocity delta (PVD) do not exceed 100 feet per minute.

 S 975-169

 (9)  
Use a hot wire anemometer and adapter to examine the air velocity at each orifice in zone 9 of the main deck cargo compartment.

 -
STA 1409, RBL 60.0

 -
STA 1409, LBL 60.0

 -
STA 1442.5, RBL 5.0

 -
STA 1466.5, RBL 3.0

 -
　
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