(a)
Before you move each fan blade, put it at the 12 o'clock position.
(b)
Carefully pull the fan blade a small increment forward in the hub slot.
(c)
Go counterclockwise, as seen from the front, to the adjacent fan blade.
(d)
Continue to move all of the blades forward, one at a time, until each blade is stopped by the fixture.
(e)
The blade at the 12 o'clock position will then be free to move fully out of the slot.
(f)
Turn the cutout in the fixture until it aligns with the blade that you will remove at the 12 o'clock position.
(g)
After you remove each fan blade (2) through the cutout, put it in the PWA 86651 storage cart to make sure the blade will not get damaged.
(h)
Turn the cutout counterclockwise, as seen from the front, and remove one more fan blade (2).
(i)
Continue to turn the cutout and remove the fan blades until all of the fan blades are in the PWA 86651 storage cart.
TASK 72-31-02-404-015-N00
4. Fan Blade Installation (One or Two Fan Blades) (Fig. 401)______________________________________________
A. General
(1)
This procedure is for the installation of one or a pair of replacement fan blades.
B.
Special Tools and Equipment
(1)
PWA 85035 - Support Fixture, Pratt & Whitney, Commercial Products Division, 400 Main Street, East Hartford, CT 06108
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
C. Standard Tools and Equipment
(1)
Mat - Protective, rubber Manufacturer's Association, Grade SC43, neoprene sponge, 1 inch thick, approximately 5 x 6 feet with warning streamers attached (3 required)
(2)
Gloves - locally available
D.
Consumable Materials
(1)
G00758 Pen - Marking, Cado Marker
(2)
D00651 Lubricant - Paste, Molykote G-N
(3)
D00247 Compound - Antigalling, Fel-Pro C-200
E.
Parts
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Lock Assy (Blade Lock) | 72-31-02| 05 | 20 | | | 2 | Blade Assy (Fan Blade) | | | 15 | 2.....….........…...................................….........….......…........1
F. References
(1)
AMM 71-00-00/501, Power Plant
(2)
AMM 72-31-01/401, Inlet Cone
G.
Access
(1)
Location Zone
412 Engine 1 - LPC Hub
422 Engine 2 - LPC Hub
432 Engine 3 - LPC Hub
442 Engine 4 - LPC Hub
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H. Install One or a Pair of Fan Blades (Fig. 401).
S 224-088-N00
(1)
Do a check of the clearance between the fan blade lock (1) and the low pressure compressor (LPC) hub.
(a)
Make sure that the clearances are in the limits as shown in the table that follows.
NOTE: The "T" refers to a tight fit.
____
~............................................................... | | | NEW PART REFERENCE | CLEARANCE | | | | DIMENSIONS | LIMITS | | PART | | INCHES | INCHES | | NAME | DIA | (MM) | (MM) | | | ................................................ | | | MIN | MAX | MIN | MAX | ................................................................. | | | | | | | | BLADE | OD | | | 0.010 | 0.060 | | LOCK | | | | (0.254) | (1.524) | ................................................................. | LPC HUB | ID | 32.989 | 32.999 | | | | | | (837.920) | (838.175) | | | 2..........….....…...........…...........…...........…..........1
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