Borescope Access Port Data
Figure 608 (Sheet 3)
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No. 13 - LPC 1st-Stage Vane and 1.6-Stage Blade Inspection
__________________________________________________________
TASK 72-00-00-206-124-N00
13. LPC 1st-Stage Vane and 1.6-Stage Blade Inspection
_________________________________________________
A. General
(1) No data is given in Fig. 608 to examine the LPC airfoils between the
1.6 and 4th-stage blades. But, if you can see damage through the fan inlet, the permitted damage limit given for the 4th-stage vanes will apply to LPC stages 1.6, 2, and 3 vanes. And, the damage limits given for the 4th-stage blades will apply to the 2nd- and 3rd-stage LPC blades.
B. Standard Tools and Equipment
(1)
Light - White, Fluorescent
(2)
Mat - Protective, Rubber Manufacturer's Association, Grade SC43, neoprene sponge, 1 inch thick, 5 x 6 feet with warning streamers attached (three required)
C.
References
(1)
AMM 71-11-04/201, Fan Cowl Panels
(2)
AMM 71-11-06/201, Core Cowl Panels
(3)
AMM 72-31-04/601, 1st-Stage Stator
(4)
AMM 72-31-05/601, 1.6th-Stage Blade
(5)
AMM 78-31-00/201, Thrust Reverser System
FAN THRU AP-4AP-2 AP-3 AP-1 (14 LOCATIONS) AP-8 AP-9 AP-7AP-5 AP-6 (6 LOCATIONS) AP-10 AP-11 (OPTIONAL) EXAUST THRU
ACCESS PORT GASPATH LOCATION
L-A0640 0688
Figure 608 (Sheet 4) Borescope Access Port Data
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
No. 13 - LPC 1st-Stage Vane and 1.6-Stage Blade Inspection
__________________________________________________________
D. Access
(1)
Location Zone
412 Engine 1
422 Engine 2
432 Engine 3
442 Engine 4
(2)
Access Panel
415 and 416 Thrust Reverser Halves - Engine 1
425 and 426 Thrust Reverser Halves - Engine 2
435 and 436 Thrust Reverser Halves - Engine 3
445 and 446 Thrust Reverser Halves - Engine 4
E.
Procedure
S 016-125-N00
(1) Open the fan cowl panels (AMM 71-11-04/201).
S 046-229-N00
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).
S 016-230-N00
(3)
Open the core cowl panels (AMM 71-11-06/201).
S 016-231-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(4)
Open the thrust reversers (AMM 78-31-00/201).
S 866-129-N00
(5)
Make sure that the fuel control switches are in the CUTOFF postion, and attach DO-NOT-OPERATE tags.
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