S 946-019-N00
CAUTION:_______MAKE SURE YOU USE A PROTECTIVE MAT. IF YOU DO NOT, DAMAGE MAY RESULT TO THE INNER SURFACE OF THE INLET COWL.
(1) Put the protective mat on the inner surface of the inlet cowl.
S 216-061-N00
WARNING: TO PREVENT INJURY TO YOUR HANDS, WEAR GLOVES ON YOUR HANDS WHEN
_______
YOU HANDLE THE BLADES.
CAUTION: USE CAUTION WITH ANY ELECTRICAL EQUIPMENT USED NEAR THE BLADES.
_______ IF ANY ELECTRICAL SOURCE TOUCHES THE BLADE, CURRENT MAY PASS THROUGH TO THE BLADE AND CAUSE AN ARC BURN. THIS COULD RESULT IN A DECREASE IN THE MATERIAL STRENGTH OF THE BLADE. THIS COULD ALSO CAUSE CRACKS TO APPEAR IN THE BLADE.
(2)
Use the equipment as follows to help find damage.
(a)
Use a strong light and mirror.
(b)
Lightly rub the blade edge with gloves or a cloth (Which will catch on lifted material) to help find damage.
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(c) Use your fingernails and fingertips to help find the size and condition of the damage.
EXAMPLE: Your fingernails can help you find if the damage has
_______
a sharp or rounded bottom.
S 216-021-N00
(3)
Examine the tip (Area C) of the blade.
(a)
Examine the tip for tears, which are not permitted.
(b)
Examine the tip for nicks, dents and other damage.
(c)
Blade tip color change (for example, a light blue color) is permitted.
S 216-022-N00
CAUTION: VERY CAREFULLY EXAMINE ALL DAMAGE TO THE LEADING AND TRAILING
_______ EDGES THAT IS IN THE AREA BETWEEN THE PART SPAN SHROUD AND THE PLATFORM. NICKS IN THE LEADING AND TRAILING EDGE BECOME MORE IMPORTANT THE CLOSER THEY ARE TO THE ROOT OF THE BLADE.
(4)
Examine the leading and trailing edges and airfoil surfaces for nicks, dents and other damage.
(a)
Examine the leading and trailing edges and airfoil surfaces for local damage such as lifted edges or compressed material.
(b)
You must repair areas of lifted edges and compressed material which have small radii or rough edges (AMM 72-31-02/801).
NOTE: Use your fingernail to help identify a local, sharp nick
____
or dent.
(c)
It is permitted for blades with erosion to continue in service.
NOTE:____Erosion is where a layer of the surface is gone. Signs of erosion are many, very small dents that feel like sand paper. Erosion limits are given at shop overhaul.
(d)
Do not blend blades that have damage which is more than the limits in Table 601. 1) Keep the fan blades that were removed for possible
subsequent repair, as specified by an approved repair source.
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~............................................................................... | TABLE 601 | | AIRFOIL DAMAGE LIMITS | ................................................................................. | | MAXIMUM DEPTH OF DAMAGE ON THE AIRFOIL | | EXAMINE THESE .............................................................. | AIRFOIL | PERMITTED | PERMITTED | PERMITTED FOR 50 HOURS | | AREAS | WITHOUT REPAIRS | AFTER REPAIRS | OF SERVICE AFTER REPAIRS | ................................................................................. | Area A | 0.020 inch | 0.750 inch | 1.000 inch | | The Tip | (0.508 mm) | (19.050 mm) | (25.400 mm) | ................................................................................. | Area B | No Damage is | No Damage is | No Damage is | | Shroud to | Permitted | Permitted | Permitted | | Airfoil Radius | | | | .................................................................................
| Area C | 0.005 inch | 0.250 inch | 0.300 inch |
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