NOTE: This test should be performed after you install an
____ autopilot stabilizer trim servo or a primary stabilizer trim actuator (PSTA). The PSTA replaces the function of the autopilot stabilizer trim servo.
S 415-004
(4)
Close the access door 3701.
S 865-005
(5)
If the electrical power is not necessary, do this task: "Remove Electrical Power" (AMM 24-22-00/201).
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27-41-71
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
STABILIZER BALL NUT AND JACKSCREW GEARBOX - REMOVAL/INSTALLATION
________________________________________________________________
1. General
_______
A. This procedure has two tasks, one for the removal and one for the installation of the stabilizer trim ball nut and jackscrew gearbox (which is referred to as the ball nut and the jackscrew gearbox). The procedure has these parts:
(1)
The removal of the ball nut and the jackscrew gearbox
(2)
The installation of the ball nut and the jackscrew gearbox.
TASK 27-41-81-004-001
2. Stabilizer Ball Nut and Jackscrew Gearbox Removal (Fig. 401)
_________________________________________________
A. Special Tools and Equipment
(1)
F80055-1 - Actuator Trammel Bar
(2)
F80014-16 and F80014-2 - Stabilizer Jackscrew Handling Equipment
(3)
F80027-13 - Horizontal Stabilizer Lock Assembly
(4)
F71252 or F71267 - Adapter or Pinion Gear Wrench Assembly
B.
Standard Tools and Equipment
(1)
Hoist capable of handling 150 pounds
(2)
Spool or reel with a capacity for 100 feet of 1/8-inch cable
C.
Consumable Materials
(1)
Grease - BMS 3-33 (Recommended)
(2)
Grease - MIL-G-23827 (Alternate)
(3)
Primer - BMS 10-11, Type I
(4)
Oil - MIL-L-7870
D.
Access
(1)
Location Zone
101 Control Cabin, LH
102 Control Cabin, RH
702 Tail Compartment Access Door
(2)
Access Panels
1103 Forward Access Door
3701 Stabilizer Trim Access Door
E.
Procedure
(1)
Set the stabilizer leading edge to the full down position.
S 864-002
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6-2 Circuit Breaker Panel
1) STABILIZER TRIM ACTUATOR
2) STABILIZER TRIM CONT
(b)
P18-0 Circuit Breaker Panel
1) STABILIZER TRIM SERVO
(3)
Open the access doors 3701 and 1103.
S 864-003
S 014-004
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500
MAINTENANCE MANUAL
2. JACKSCREW
CONNECTORS 11. ELECTRICAL 1. BALL NUT FITTING 3. JACKSCREW 4. SAFETY BOLTS
STABILIZER 18. PRIMARY TRIM ACTUATOR BUNDLE 12. WIRE CLAMP SEE A GREASE FITTING 5. UPPER GIMBAL
GEARBOX 8. JACKSCREW
STABILIZER 15. PRIMARY TRIM MOUNT BOLTS
(3 LOCATIONS) MOUNT BOLTS 19. COVER PLATE GIMBAL PIN 13. LOWER
CABLE 17. STB STRAP 14. SAFETY
CABLE 16. STA
FWD SEE B COVER 9. ACTUATOR
