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REPAIR
1. REPAIRS AUTHORIZED ON ENGINE MOUNT (Table 801 and Figure 801)
CAUTION : ONLY ONE DEFECT PER TUBE IS AUTHORIZED. IN CASE OF SEVERAL DEFECTS ON
ONE TUBE, RETURN THE ENGINE MOUNT TO THE MANUFACTURER.
TUBE STRESSES DIAMETER A
ACCEPTABLE
DEFECTS
RECOMMENDED SOLUTION
Upper Deflection / traction 0.79 in (20 mm) None (See Note 1) Replacement (See Note 2)
Central Deflection / traction 0.79 in (20 mm) None (See Note 1) Replacement (See Note 2)
Lower Buckling 0.98 in (25 mm) None (See Note 1) Replacement (See Note 2)
Crown, vertical Buckling 0.98 in (25 mm) Yes (See Note 3) Repair
Crown, horizontal Buckling 0.79 in (20 mm) Yes (See Note 3) Repair
NOTE 1 : For a defect beyond the L dimension (see Figure 801), repair may be considered after approval of the manufacturer's Design Office.
NOTE 2 : For tube replacement, return the engine mount to the manufacturer. NOTE 3 : Only one defect per tube is authorized.
Table 801
2. PERMISSIBLE DEFECTS (Table 802 and Figure 802)
Tube dia. 0.98 in (25 mm) Tube dia. 0.79 in (20 mm)
B within 65° and 90° L =
I =
P = 0.256 in (6.5 mm)
0.157 in (4 mm)
0.007 in (0.2 mm) L =
I =
P = 0.216 in (5.5 mm)
0.118 in (3 mm)
0.007 in (0.2 mm)
B within 15° and 65° L =
I =
P = 0.256 in (6.5 mm) / sin B
Max. 0.59 in (15 mm) L =
I =
P = 0.216 in (5.5 mm) / sin B
Max. 0.47 in (12 mm)
0.157 in (4 mm)
0.015 in (0.4 mm) 0.118 in (3 mm)
0.015 in (0.4 mm)
B within 0° and 15° L =
I =
P = 0.256 in (6.5 mm)
0.157 in (4 mm)
0.023 in (0.6 mm) L =
I =
P = 0.216 in (5.5 mm)
0.118 in (3 mm)
0.023 in (0.6 mm)
Table 802
NOTE : For a defect more than 0.023 in (0.6 mm) deep, replace the tube ; return the engine mount to the manufacturer.
3. REPAIR (Table 802 and Figure 801)
A. Tools and consumable materials
- Filler metal 8CD12
- Siccative oil (TB 05-914)
- Cleaning agent (TB 11-003)
- Protection product (TB 05-939)
- Primer (TB 16-901)
- Paint (TB 16-903)
- Filtered compressed air
- Syringe
- Extra smooth file
- Abrasive cloth (TB 05-916A)
- Pop riveting pliers
B. Repair procedure for a defect depth less than 0.007 in (0.2 mm)
1) Strip the area to be repaired.
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