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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
~............................................................................... | TABLE 601 | | INSPECTION OF AREAS OTHER THAN THE VANES | ................................................................................. | Examine | Damage Limits | Necessary Procedure | ................................................................................. | Total Cir-| 24.000 inches | Damage that is more than the limits | | cumferential| (609.600 mm) maximum | is not permitted. | | length, all | | | | damage, on | | | | each flange | | | ................................................................................. |Repair Welds:| None are permitted | If there are cracks, you must remove | | cracks in | | the case and vane assembly. | | the weld | | | | ................................................................... | Other Areas:| | | | Dents | 0.050 inch (1.270 mm) | Dents that are less than the limits | | | in depth, maximum, | and have no cracks, are permitted. If | | | with rounded bottoms | the dent is more than the limits, you | | | | must remove the case and vane assembly| | ...................................................................
| Pits | 0.010 inch (0.254 mm) | You must make the area smooth. If |
| | in depth, maximum | the damage is worse than the limits, |
| | | you must remove the case and vane |
| | | assembly. |
| ................................................................... | Cracks in | None are permitted | If there are cracks in the inner case,| | the Inner | | you must remove the case and vane | | Case | | assembly. | | ................................................................... | Cracks in | 1.000 inch (25.400 mm) | The engine can continue to operate | | the Outer | maximum circumferential| for 20 more hours, if the crack has | | Case | length | all 3 of the conditions that follow: | | | | 1) The crack is less than the limits. | | | 0.500 inch (12.700 mm) | 2) You correctly stop drill the crack | | | maximum axial length | with a 0.0625 inch (0.1581 mm) drill| | | | 3) The crack does not go into a flange | | | | or boss. | 2.............…........................…........................................1
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S 216-023-N00
(2)
See if the vane damage is local and isolated.
(a)
If the vane damage is not local and isolated, you must replace the vane immediately (AMM 72-33-02/801).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
2.5 BLEED VALVE
FAN EXIT A INNER CASE
A
B B
FLANGE C
FLANGE B
FAN CASE FLANGE B2 NUTS AND WASHERS
FLANGE B1 FAN EXIT CASE AND SEE B PW SB 72-262 ON ENGINES WITH
SEE A VANE
LOCKWIRE
A-A
2 1 WITHOUT PW SB 72-262 PARTIAL INCORPORATION OF PW SB 72-262 PERMITTED LOCKWIRE PATTERNS WITH PERMITTED LOCKWIRE PATTERN FOR ENGINES B-B 1 B B-B 2
Figure 601 (Sheet 1) Fan Exit Case Inspection
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0.150 INCH
(3.810 mm) INITIAL DIMENSION
DAMAGE
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本文链接地址：747-400 AMM 飞机维护手册 发动机 ENGINE 2(16)
