................................................................................. | | Indentations in this area are | | | | permitted. Raised spots on the | | | B | opposite side of the foil are | None | | | permitted if there are no cracks.| | ................................................................................. | | Damage that has a depth of 1/32 | A maximum depth of 5/32 in. | | C | in. (.794 mm) and is isolated by | (3.969 mm) is permitted. | | | a minimum of 1/4 in. (6.35 mm) | See NOTE. | | | radially is permitted. | | ................................................................................. | D | No damage is permitted. | None | ................................................................................. | | Damage that has a depth of 1/64 | For blades in the 5th stage, | | | in. (.397 mm) and is isolated by | no repair is permitted. | | | a minimum of 1/4 in. (6.35 mm) | | | E | radially is permitted. | For blades in the 6th and | | | | 7th stage, | | | | a maximum depth of 3/32 | | | | inch (2.381 mm) is permitted.| | | | See NOTE. | ................................................................................. | | Damage that has a depth of 1/32 | | | F | in. (.794 mm) and is isolated by | None | | | a minimum of 1/4 in. (6.35 mm) | | | | radially is permitted. | | ................................................................................. | | Damage that has a depth of 1/64 | | | G | in. (.397 mm) and is isolated by | None | | | a minimum of 1/4 in. (6.35 mm) | | | | radially is permitted. | | ..............…..................................…............................... | | | NOTE: The Blend Limits include 0.012 inch (0.305 mm) of material that is not | | damaged that must be blended along with the material that is damaged. | | | 2...............................................................................1
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MINIATURE DRIVE
CAMERA CHIP COLOR MINIATURE BORESCOPE STONE & ROTARY FILE ATTACHMENT LIGHT SOURCE
VIDEO SYSTEM
POWER UNIT MINIATURE
FOOT PEDAL CONTROL CHARACTER GENERATOR VIDEO MICROMETER CONTROL
Borescope Blend Repair Equipment Schematic
Figure 802
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F01500
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 328-012-N00
WARNING:_______ DO THIS REPAIR IN AN AREA THAT IS PROTECTED FROM THE WEATHER.
IF THIS REPAIR IS DONE IN WET CONDITIONS, USE SUFFICIENT
PROTECTION TO PREVENT INJURIES TO PERSONS AND DAMAGE TO
EQUIPMENT.
(2)
Blend the blades that are damaged.
(a)
This repair and equipment only applies to the leading edges of the blades that are damaged in the 5th, 6th, and 7th stage of the HPC.
(b)
Get access to the blades that are damaged through the borescope ports AP-2 and AP-3.
(c)
Only one repair that is more than the Service Limits is permitted for each blade. The Service Limits and Blend Limits are found on Figure 801 and Table 801.
