(2)
AMM 71-11-01/401, Inlet Cowl
(3)
AMM 71-11-04/201, Fan Cowl Panels
(4)
AMM 72-31-02/401, 1st-Stage (Fan) Blade
(5)
AMM 73-21-04/401, Electronic Engine Control (EEC)
(6)
AMM 73-21-15/401, Supplemental Control Unit (SCU)
(7)
AMM 77-31-01/401, Engine Accelerometer
F.
Access
(1)
Location Zone
412 Engine 1 - Front Fan Case
422 Engine 2 - Front Fan Case
432 Engine 3 - Front Fan Case
442 Engine 4 - Front Fan Case
(2)
Access Panel
413 and 414 Fan Cowl Panels - Engine 1
423 and 424 Fan Cowl Panels - Engine 2
433 and 434 Fan Cowl Panels - Engine 3
443 and 444 Fan Cowl Panels - Engine 4
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-33-01
ALL ú ú N02 Page 415 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
G. Prepare for the Installation
S 224-021-N00
(1) Refer to the table that follows when you measure the gap between the front fan case (24) and the outer fan exit case at Flange B.
NOTE: The dimensions in the table are given as data only.
____ ~.............................................................. | | | NEW PART DIMENSIONS | CLEARANCE LIMITS | | PART | | INCHES | INCHES | | NAME | DIA | (MM) | (MM) | | | ............................................... | | | MIN | MAX | MIN | MAX | ................................................................ | FAN EXIT | OD | 90.334 | 90.344 | | | | CASE | | (2294.48) | (2294.74) | 0.026T | 0.006T | .......................................... (0.66T) | (0.15T) | | FRONT | ID | 90.318 | 90.328 | *[1] | *[1] | | FAN CASE | | (2294.08) | (2294.33) | | | 2..........….....…...........…...........…..........…..........1 *[1] "T" is for a tight fit.
H. Install the Front Fan Case
S 434-022-N00
(1)
If you will install a new fan case (24), do the steps that follow:
(a)
Install the two bolts (26), threads lubricated with engine oil, that attach the mounting pad (25) for the vibration acceleraometer to Flange A at approximately the 1:00 o'clock position. 1) Tighten the bolts (26) to 65-85 pound-inches
(7.3-9.6 newton-meters). 2) Install lockwire on the bolts (26).
(b)
Install the brackets (10, 11, 32, 37, 38, 39, and 41) and the seven (27) brackets to Flange A1 as follows: 1) Install the bolts (28), threads lubricated with engine oil,
washers (5, 29, and 30), and nuts (31) that attach the brackets (32 and 38) and the seven (27) brackets to Flange A1.
NOTE: These are at approximately the 11:30, 11:45, 12:00,
____ 1:00, 1:30, and 2:30 o'clock positions.
a) Tighten the bolts (28) to 85-95 pound-inches (9.6-10.7 newton-meters).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-33-01
ALL ú ú N02 Page 416 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
2) Install the bolts (33), threads lubricated with engine oil, washers (34), and nuts (35) that attach the brackets (10, 39, and 41) to Flange A1.
NOTE: These are at approximately the 1:30, 2:00 and 3:00
____
o'clock positions.
a) Tighten the bolts (33) to 85-95 pound-inches (9.6-10.7 newton-meters).
3) Install the bolts (36), threads lubricated with engine oil, washers (5 and 29), and nuts (31) that attach the brackets (11, 37, and 38) to Flange A1.
NOTE: These are at approximately the 1:45 and 2:00 o'clock
____
positions.
a) Tighten the bolts (36) to 85-95 pound-inches (9.6-10.7 newton-meters).
S 424-023-N00
(2)
Install the front fan case (24) on the engine as follows:
(a)
Install the PWA 85677 handling bracket to the front flange of the front fan case (24) at the 12:00 o'clock position.
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