Standard Practices [CFML]

TASK 70-60-00-910-802-A
Standard Practices

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

1. Reason for the Job
This section contains standard practices for use in maintenance and repair tasks on the nacelle.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	COVER - PROTECTION
No specific	1	WRENCH - TORQUE, DIAL TYPE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

REFERENCE	DESIGNATION
Check of the Maximum Locking and Minimum Breakaway Torque Values

3. Job Set-up
Subtask 70-60-00-860-050-A

A. Not Applicable

4. Procedure
Subtask 70-60-00-210-050-A

A. Inspection of the Condition of the Nuts (Captive Nuts and Self-locking Nuts)

NOTE: This procedure gives instructions to examine the condition of the old nuts to use the old nuts again.

NOTE: Do this procedure at ambient temperature.

NOTE: Do this procedure only if you use the old nuts again.

NOTE: If the minimum breakaway torque and maximum locking torque checks are not satisfactory, replace the nut with a new one.

(1) Do a check for the maximum locking torque for each nut:
(a) Tighten the bolt until the self-locking device is fully engaged.
(b) Use a WRENCH - TORQUE, DIAL TYPE to measure the maximum locking torque value of the bolt.

NOTE: Make sure that minimum 1.5 threads of the bolt extend more than the nut to record the locking torque value.

Check of the Maximum Locking and Minimum Breakaway Torque Values

NOTE: Make sure that there is a play in the assembly between the nut and the part to assemble.

(c) Compare the recorded value with the torque limits and make sure that the maximum locking torque value of the bolt is not more than torque limits. Refer to Table 201.
(d) If the maximum locking torque value is not in the limits, replace the nut with a new one.
(2) Do a check for the minimum breakaway torque for each nut:
(a) Loosen the bolt with the WRENCH - TORQUE, DIAL TYPE.

NOTE: Make sure that minimum 1.5 threads of the bolt extend more than the nut and record the breakaway torque value.

Check of the Maximum Locking and Minimum Breakaway Torque Values

(b) Compare the recorded value with the torque limits and make sure that the minimum breakaway torque value of the bolt is more than the torque limits. Refer to Table 201.
(c) If the minimum breakaway torque value is not in the limits, replace the nut with a new one.

Table 201: Maximum Locking Torque and Minimum Breakaway Torque Values

NOMINAL DIAMETER OF FASTENER	MAXIMUN LOCKING TORQUE	MINIMUN BREAKAWAY TORQUE
4.8 mm (0.19 in.)	0.17 m.daN (15.04 lbf.in)	0.023 m.daN (2.04 lbf.in)
6.35 mm (0.25 in.)	0.339 m.daN (30.00 lbf.in)	0.04 m.daN (3.54 lbf.in)
7.93 mm (0.31 in.)	0.678 m.daN (60.00 lbf.in)	0.073 m.daN (6.46 lbf.in)
9.52 mm (0.37 in.)	0.904 m.daN (80.00 lbf.in)	0.107 m.daN (9.47 lbf.in)
11.11 mm (0.44 in.)	1.13 m.daN (100.00 lbf.in)	0.158 m.daN (13.98 lbf.in)
12.7 mm (0.50 in.)	1.695 m.daN (12.50 lbf.ft)	0.203 m.daN (17.96 lbf.in)

Subtask 70-60-00-960-050-A

B. Replacement of the Floating Nuts

WARNING: WHEN YOU DRILL, MACHINE, BLEND, GRIND OR SAND PARTS, USE PROTECTIVE CLOTHING, GLOVES, DUST MASK AND GOGGLES. BE CAREFUL NOT TO BREATHE THE DUST OR LET IT TOUCH YOUR SKIN. DUST AND PARTICLES ARE DANGEROUS FOR YOUR HEALTH.

CAUTION: BE CAREFUL NOT TO CAUSE DAMAGE TO THE ADJACENT STRUCTURES WHEN YOU DO THESE OPERATIONS.

(1) Install a temporary COVER - PROTECTION around the work area.
(2) Removal of the floating nut.
(a) Drill out the rivets (2 positions) (Refer to Airbus Industrie Process and Material Specification Manual, Chapter 01-04-25 for drilling).
(b) Remove the floating nut.
(c) Clean the work area with a made moist with a Textile-Lint free Cotton - (Material No.14SBA1) moist with a Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(d) Dry the work area with a Textile-Lint free Cotton - (Material No.14SBA1) before the solvent becomes gas.
(3) Installation of the new floating nut.
(a) Put the new floating nut in position.

NOTE: The IPC references of floating nut and rivets to be used is indicated in specific AMM procedure of replacement of the part.

(b) Make sure that the holes are correctly aligned.
(c) Temporarily use clamps to prevent the movement of the floating nut.
(d) Install the rivets (2 positions) that attach the new floating nut (Refer to Airbus Industrie Process and Material Specification Manual, Chapter 01-04-30 for installation of blind rivets).

NOTE: The head of the rivets (2 positions) must be flushed.

NOTE: The rivets with length equivalent to a theoretical-clamping thickness immediately above or below is not out of the design.

(e) Remove the clamps.
(f) Clean the work area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(g) Dry the work area with a Textile-Lint free Cotton - (Material No.14SBA1) before the solvent becomes gas.

[Rev.10 from 2021] 2026.04.01 02:21:05 UTC