1. BOLT
PRESSURE
PORT

TEST PORT
6. BOLT4. RATE SENSORFWD11. PACKING
10. RING
14. PACKING
9. NUT
15. RING
5. BOLT 16. NUT 8. ELBOW 6. BOLT
17. ELBOW
7. PRESSURE TUBE
18. TUBE ASSEMBLY  (SENSE LINE)
B

Rate Sensor Installation
Figure 401 (Sheet 2)

F58402
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A
747-400 MAINTENANCE MANUAL
 (h)  
Remove the rate sensor (4).

 (i)  
If the new or serviceable rate sensor (4) does not have the elbow (8) and its attaching parts, remove these parts from the rate sensor: 1) Remove the elbow (8), nut (9), ring (10) and packing (11). 2) Discard the packing (11).

 (j)  
If the new or serviceable rate sensor (4) does not have the elbow (17) and its attaching parts, remove these parts from the rate sensor: 1) Remove the elbow (17), nut (16), ring (15) and packing

 (14). 2) Discard the packing (14).

 (k)
Make sure you install all necessary protection covers.

 TASK 49-52-07-404-011
 3.  Rate Sensor Installation (Fig. 401)________________________
 A. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 4 | Sensor Assembly (Rate Sensor) | 49-52-07 | 01 | 35 | | | 11 | Packing | 49-52-00 | 01 | 45 | | | 13 | Packing | 49-52-07 | 01 | 25 | | | 14 | Packing | 49-52-00 | 01 | 335 | 2.......….......…...................................…...........…......….......1
 B. Access
 (1)  
Location Zones
 221 Control Cabin - Left
 222 Control Cabin - Right
 310 Fuselage - Station 2360 to Station 2792

 (2)  
Access Panels
 317AL APU Access Door - Left
 318AR APU Access Door - Right

 C.
Procedure

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747-400 MAINTENANCE MANUAL
 S 424-029
 CAUTION:_______ MAKE SURE YOU DO NOT HIT THE AIR INLET PLENUM WITH YOUR HANDS
 OR YOUR TOOLS.  DAMAGE TO THE AIR INLET PLENUM CAN OCCUR.
 CAUTION:_______ REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY.
 IF YOU DO NOT REMOVE THE PROTECTION COVERS, DAMAGE TO THE APU

 CAN OCCUR.
 (1)  
Do these steps to install the rate sensor (4):

 (a)  
If the rate sensor (4) does not have the elbow (8) and its attaching parts, install these parts to the rate sensor:

 CAUTION: DO NOT LUBRICATE THE PACKING (11) WITH ENGINE OIL.
_______ ENGINE OIL CAN DAMAGE OR CHANGE THE SHAPE OF THE PACKING.
 1)  Install the new packing (11), ring (10), nut (9) and elbow (8) on the rate sensor (4).
 2)  Tighten the nut (9) with your fingers.
 (b)  If the rate sensor (4) does not have the elbow (17) and its attaching parts, install these parts on the rate sensor:
 CAUTION: DO NOT LUBRICATE THE PACKING (14) WITH ENGINE OIL.
_______ ENGINE OIL CAN DAMAGE OR CHANGE THE SHAPE OF THE PACKING.
 1)  Install the new packing (14), ring (15), nut (16) and elbow (17) on the rate sensor (4).
 2)  Tighten the nut (16) with your fingers.
 (c)  Attach the rate sensor (4) to the bracket (2) with the two washers (12), two bolts (6) and two nuts (3). 1) Tighten the two nuts (3) to 36-40 inch-pounds (4.1-4.5
 newton-meters).
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