ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

GE PROPRIETARY INFORMATION The information contained in this document is GE proprietary information and is disclosed in con fi dence. It is the property of GE and shall not be used, disclosed to others or reproduced without the express written consent of GE, including, but without limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modi fi cations, spare parts, designs, or con fi guration changes or to obtain FAA or any other government or regulatory approval to do so. If consent is given for reproduction in whole or in part, this notice and the notice set forth on each page of this document shall appear in any such reproduction in whole or in part. This technical data is considered EAR controlled pursuant to 15 CFR Parts 730-774 respectively. Transfer of this data by any means to a Non-US Person, whether in the United States or abroad, without the proper U.S. Government authorization (e.g., License, exemption, NLR, etc.), is strictly prohibited. Copyright (2012) General Electric Company, U.S.A.

August 22, 2012 GEnx-2B S/B 72-0091 Rev ision 01, September 14, 2012 PAGE 1 of 32ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

TRANSMITTAL INFORMATION REVISION 1 TO SERVICE BULLETIN 72-0091 Revision 1 is issued to update paragraphs 1.A., E f fe ct i v i ty , 1.B., D e s c r i p t i o n , 1.C., C o m p l i a n ce , 1.E., R e a s o n , and 3., Ac co m p l i s h m e n t I n s t r u ct i o n s
. The original was issued on the August 22, 2012. Revision bars in the left margin identify changes. 1. P LA N N I N G I N F O R M A T I O N A. E f fe ct i v i ty GEnx-2B67, GEnx-2B67B This Service Bulletin is applicable to all GEnx-2B engines. B. D e s c r i p t i o n This Service Bulletin provides an inspection procedure of the mid fan shaft in an assembled engine. C. C o m p l i a n ce Category 2 GE recommends that you do this Service Bulletin as soon as possible without effect on revenue service but before 30 days from the issue date of this Service Bulletin revision. For engines that have previously compli ed with GEnx-2B SB 72-0091 Revision 0, or that have been inspected prior to aircraft delivery, reinspect within 90 days from completion date of the initial inspection and then at a maximum 90 day interval thereafter. N O T E : This Service Bulletin can be accomplished on wing and/or in shop. This Service Bulletin is offered to improve the reliability or performance of your GE product, or to help prevent the occurrence of the event or condition described in this Service Bulletin. If the operator elects not to participate in the bulletin, that decision will be taken into consideration by GE in evaluating future product performance issues that may arise in the operator’s fl eet. D. C o n c u r re n t R e q u i re m e n ts None. E. R e a s o n (1) Objective: Ultrasonic inspection of the installed mid fan shaft forward end for the presence of cracks. August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 2 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

(2) Condition: A GEnx engine experienced a fracture in the forward threaded end of the mid fan shaft prior to aircraft delivery. (3) Cause: Environmentally assisted cracking. (4) Improvement: None. (5) Substantiation: Engineering analysis and metallurgical evaluation of fi eld hardware. F. A p p ro v a l This Service Bulletin has been reviewed by the FAA and the repair(s) and modi fi cation(s) herein comply with the applicable Federal Aviation Regulations and are FAA APPROVED for installation in the model(s) listed in this Service Bulletin. G. M a n p owe r You will need approximately 9 man-hours to accomplish this service bulletin. H. We i g h t a n d B a l a n ce Weight and balance are not changed. I. R efe re n ce s (Use the latest version of these documents) Boeing 747-8 Aircraft Maintenance Manual (AMM) NAS-410, Certi fi cation and Quali fi cation of Non-destructive Test Personnel Aerospace Industries Association - National Aerospace Standard (Latest Revision) J. P u b l i ca t i o n s Af fe cte d None. K. I n te rc h a n g e a b i l i ty Not applicable. L. S of tw a re Ac co m p l i s h m e n t S u m m a ry Not applicable. 2. M A T E R I A L I N F O R M A T I O N A. M a te r i a l

- P r i ce a n d A v a i l a b i l i ty August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 3 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

(1) Parts necessary to do this Service Bulletin: None. (2) Other Spare Parts:

P a rt N u m b e r Q ty/ E n g P a rt N a m e U n i t ( $ ) P r i ce P kg Q ty L e a d T i m e D a ys J1438P177 (1) Packing, Preformed Quote (X) Quote

N O T E : Prices are provided for planning purposes and are subject to change. (3) Consumables: C o d e N u m b e r D e s c r i p t i o n C02-019 Oil, Engine Lubricating (engine oil) - couplant C02-023 Oil, Engine Lubricating (engine oil) - couplant C05-003 Marking Pens

-- Absorbent Rags B. I n d u s t ry S u p p o rt I n f o r m a t i o n Contact your Customer Support Manager (CSM) for industry support information. C. C o n fi g u ra t i o n C h a rt None. D. P a rts D i s p o s i t i o n None. E. T o o l i n g - P r i ce a n d Ava i l a b i l i ty T

o o l N u m b e r D e s c r i p t i o n 9C3020P09* Removal Bar (recommended) 11C3084G02* Fan Disk Bore Protector (recommended) 11C3304G01* Installation Tool Forward Retainer and Lock Plate
August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 4 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

T

o o l N u m b e r D e s c r i p t i o n 11C3421G02* Fan Shaft Cover Fixture 11C4654G01 LPT Shaft I/R Fixture (alternative to 9C3020P09) GE-FQAP-660 Ultrasonic Inspection Kit

-- **Fan Disk Bore Protector (alternative to 11C3084G02) *Orders for 9C and 11C engine tooling should be made to Rhinestahl Corporation at sales@rhinestahl.com. Mark: Purchase Order with GEnx FMS Inspection Service Bulletin 72-0091. **Alternative disk bore protection can be used to protect the bore from contact damage (rubber sheeting minimum 0.100 inch (2.54 mm) in thickness). The following items are supplied with the inspection kit GE-FQAP-660 P a rt N u m b e r D e s c r i p t i o n Q ty 389-082-170 Ultrasonic Transducer Assembly (2) 387-010-618 Reference Standard Assembly (1) 389-082-180 Transducer Switch Box (2) 022-509-749 Lemo to BNC Adaptor (2)

-- USMGo Ultrasonic Instrument (1)

-- Brush - Applicator (1)

-- Approved Marker on Extension Handle (1)

-- Storage Case (1) To obtain an ultrasonic kit, additional items, or replacement items, contact the GE Inspection Technologies Group via the following method: GE Inspection Technologies 50 Industrial Park Road Lewistown, PA 17044 Attn: NDE Kit Coordinator email: ndttooling@ge.com

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 5 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

3. A C C O M P L I S H M E N T I N S T R U C T I O N S A. R e m o v a l (1) Remove the spinner fan (20-010, 72-00-00) and the spinner assembly aft support ring (20-101). (a) If removal process of the spinner fan and the spinner assembly aft support ring is done on wing, refer to GEnx-2B Boeing 747 AMM 72-22-01. (b) If removal process of the spinner fan and the spinner assembly aft support ring is done in shop, refer to the GEnx-2B EM, 72-00-01, REMOVAL 001, Subtask 72-00-01-020-002. (2) Remove the fan shaft cover (20-260, 72-00-02) as follows. Refer to Figure 1. (a) Compress and remove the retainer ring (20-250) manually. (b) Remove the fan shaft cover (20-260) with 11C3421 fan shaft cover fi xture as follows: 1 Install removal cover (item 2) to the fan shaft cover. 2 Align the tabs on tool 11C3421 fan shaft cover fi xture with the slots in the fan shaft cover and turn the tool to engage the tabs on the fan shaft cover (20-260). 3 Install the cross bar puller (item 12) on the forward end of the removal cover (item 2). CA U T I O N : MAKE SURE NOT TO DAMAGE THE FAN ROTOR DISK SURFACE WHEN THE CROSS BAR PULLER IS ATTACHED. 4 Attach the cross bar puller (item 12) to the fan rotor disk (01-050, 72-22-00) with lock pins (item 15) and hand knobs (item 13). 5 Install sleeve (items 14) and torque arm plate (item 3) to the removal cover (item 2). 6 Make sure that the removal cover (item 2) stays fully engaged in the fan shaft cover and turn the torque arm plate (item 3) to remove the fan shaft cover (20-260, 72-00-02). 7 Remove 11C3421 fan shaft cover fi xture from the fan rotor and remove fan shaft cover from the fi xture (item 2). (3) Remove packing (20-270) from the fan shaft cover (20-260) and discard the packing. (4) Remove the retainer ring (20-280) and nut lock plate (20-290) as follows. Refer to Figure 2. August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 6 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

(a) Use 9C3020P09 removal bar or a screw driver to engage the tip of retainer ring (20-280) to move it inward and to disengage it from the slot in the mid fan shaft (01-010, 72-58-00). (b) Use a marking pen (C05-003) to put a mark on the nut lock plate (20-290, 72-00-02) to align it with the mid fan shaft (01-010, 72-58-00) and remove the nut lock plate. N O T E : Oil will be applied to the forward shaft and nut surface during the inspection. Do not put marks on these locations for indexing purposes of the inspection. (c) Install 11C3084 fan disk bore protector. N O T E : A piece of rubber sheeting with a minimum of 0.100 inch (2.54 mm) in thickness can be used for protection on the bore surface to prevent contact damage as an alternative to the 11C3084 bore protector tool. B. I n s p e ct i o n (1) S co p e (a) This Service Bulletin describes th e technique, equipment, and procedure required for conducting an on-engine manual ultrasonic inspection of the mid fan shaft (01-010, 72-58-00) for the detection of localized cracks. Refer to Figure 5 . (b) The inspection must be done on-engine with the spinner fan (20-010, 72-00-00), fan shaft cover (20-260, 72-00-02), and coupling nut lock rings removed. Refer to Figure 1. (c) This inspection is done with a dedicated ultrasonic probe assembly with four transducers that point an ultrasonic beam through the top and bottom of the castellations on the forward end of the mid fan shaft (01-010, 72-58-00). Refer to Figure 13 . (d) For speci fi c cases where the procedures or equipment described herein cannot be applied in total, speci fi c exceptions must be obtained in writing from the appropriate technical function prior to any inspection of hardware. (2) A p p l i ca b l e D o c u m e n ts (a) NAS-410 (latest revision). (b) Applicable manufacturer’s equipment user’s manual. (3) P e rs o n n e l R e q u i re m e n ts (a) Personnel must be certi fi ed in accordance with NAS-410, American Society of Nondestructive Testing (ASNT-TC-1A), or local certi fi cation process to do this inspection. August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 7 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

(b) It is strongly recommended that personnel that will do this inspection receive practical training in the use of this procedure and must demonstrate pro fi ciency in the calibration, inspection, and evaluation routines before accept/reject authority is delegated. (c) Any training which can be provided regarding the performance of this inspection does not imply that the personnel who receive that training have met the requirements for inspector certi fi cation in accordance with NAS-410, the appropriate certi fi cation document. (4) I n i t i a l E q u i p m e n t S e t u p N O T E : Refer to the manufacturer’s equipment manual for the particular ultrasonic instrument used fo r this inspection if any questions arise about the instrument. (a) Connect the ultrasonic instrument to the appropriate power source and switch the instrument power ON. Let the instrument warm up for at least 10 minutes or the manufacturer’s recommended warm up time. (b) Connect the four transducer cables from the inspection fi xture to the appropriate connectors on the transducer switchbox as marked. (c) Connect the transducer switch box to the instrument. W

A R N I N G : REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT. CA U T I O N : ONLY APPROVED ENGINE OIL CAN BE USED AS COUPLANT ON THE GENX FAN MID SHAFT. (d) Fill the inspection fi xture syringe with an approved engine oil (C02-019) or engine oil (C02-023) for the ultrasonic couplant. (e) Adjust the ultrasonic instrument to the basic settings. Refer to Figure 14 . (5) P re - i n s p e ct i o n P re p a ra t i o n

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 8 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

(a) Engines have to be prepared for inspection as follows (use appropriate technical data to accomplish): CA U T I O N : EXCESSIVE TEMPERATURES CAN CAUSE DAMAGE TO THE TRANSDUCERS AND ASSEMBLIES USED FOR THIS INSPECTION. IF THE ENGINE IS REMOVED FROM OPERATION TO PER FORM THIS INSPECTION, SUFFICIENT TIME FOR COOLING MUST BE ALLOWED BEFORE THE INSPECTION CAN BE ACCOMPLISHED. AS A GENERAL RULE, THE ENGINE HARDWARE TO BE INSPECTED MUST BE COOL ENOUGH TO TOUCH. THE USE OF A PORTABLE FAN OR EQUIVALENT EQUIPMENT TO BLOW AIR INTO THE BORE NEAR THE INSPECTION AREA IS AN ACCEPTABLE METHOD TO REDUCE METAL TEMPERATURES MORE QUICKLY. 1 Get access to the forward end of mid fan shaft (01-010, 72-58-00). Refer to Figure 1 . 2 Castellation No. 1 will be in line with the stage 1 fan blade dovetail. Rotate the castellation No. 1 to the 6 o’clock position. Refer to Figure 2 . N O T E : The No. 1 fan blade can be identi fi ed with a number 1 marked on the fan disk. 3 Put the rags forward of the mid fan shaft (01-010) to absorb unwanted oil run-off. (6) E q u i p m e n t C a l i b ra t i o n (a) Prepare the ultrasonic instrument and probe according to paragraph 3.B.(4). (b) Set the transducer switchbox to position 1 (transducer 1 - upper castellation). Refer to Figure 6 . (c) Adjust range and delay so that the leading edge of the second delay multiple is at the fi rst major division on the instrument baseline and the leading edge of the third delay multiple is at the ninth major division. Refer to Figure 7 and Figure 8 . W

A R N I N G : REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT. CA U T I O N : ONLY APPROVED ENGINE OIL CAN BE USED AS COUPLANT ON THE GENX FAN MID SHAFT. (d) Apply engine oil (C02-019) or engine oil (C02-023) to the upper and lower castellations on the inspection standard with a brush.
August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 9 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

(e) Put the probe assembly safely on the inspection standard and maximize the response from the side drilled hole. (f) Apply engine oil to the transducer with the syringe. (g) For transducer 2 (lower castellation), do as follows: 1 Adjust the transducer switchbox to position 2 (transducer 2 - lower castellation). 2 Adjust the gain to set the amplitude of the response from the side drilled hole to 80 percent of full screen height (FSH). Refer to Figure 9 . 3 Record the calibration settings on the worksheet in Figure 15 . (h) For transducers 1, 3, and 4 (upper castellation), do as follows: 1 Adjust to add 3dB of gain to the transducer 2 calibration gain and make sure that the backwall response from each of the transducers 1, 3, and 4 is above 80 percent FSH. Refer to Figure 10 . 2 Record the calibration settings on the worksheet in Figure 15 . (7) I n s p e ct i o n N O T E : Two different gain settings will be used for this inspection. (a) Make sure that the initial equipment setup, pre-inspection preparation, and system calibration are complete. Refer to paragraph 3.B.(4), paragraph 3.B.(5), and paragraph 3.B.(6). (b) For transducer 2 (lower castellation), do as follows: 1 Set the transducer switchbox to position 2. Adjust the instrument gain setting to number 2 transducer gain level. 2 Put the gate from 3.2 - 5.0 on horizontal base line at 30 percent (FSH). Refer to Figure 11 . W

A R N I N G : REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT. CA U T I O N : ONLY APPROVED ENGINE OIL CAN BE USED AS COUPLANT ON THE GENX FAN MID SHAFT. 3 Apply engine oil (C02-019) or engine oil (C02-023) to the upper and lower castellations on the FMS with a brush.

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 10 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

4 Carefully insert the transducer assembly into the forward end of the mid fan shaft (01-010) until the transducer at position No. 1 is at the upper castellation at the 6 o’clock position. 5 Apply engine oil to the transducer with the syringe. 6 Monitor the gate for valid responses above 30 percent FSH within the gate. If valid responses are detected, do an analysis. Refer to paragraph 3.B.(9). 7 Record the maximum amplitude within the gate on Form 2194-1. Refer to Figure 15 . 8 Pull back the transducer assembly and turn it counterclockwise (CCW) forward looking aft (FLA) to the next castellation position. 9 Turn the shaft clockwise (CW) FLA to the 6 o’clock position. 1 0 Do paragraph 3.B.(7)(b)(5) thru paragraph 3.B.(7)(b)(9) again until all 16 lower castellation positions are completed. (c) For transducers 1,3, and 4 (upper castellations) do as follows: 1 Adjust the gain level to the transducer 2 calibration gain + 3dB. 2 Record the fi nal inspection gain on Form 2194-1. Refer to Figure 15 . 3 Set the transducer switchbox to position 1. 4 Put the gate from 5.5 to 7.0 on the horizontal base line at 30 percent FSH. Refer to Figure 12 . W

A R N I N G : REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT. CA U T I O N : ONLY APPROVED ENGINE OIL CAN BE USED AS COUPLANT ON THE GENX FAN MID SHAFT. 5 Carefully insert the transducer assembly into the forward end of the fan mid shaft until the transducer at position 1 is at the upper castellation at the 6 o’clock position. Refer to Figure 2 and Figure 13 . 6 Apply engine oil (C02-019) or engine oil (C02-023) to the transducers with the syringe. 7 Select each transducer in turn using the transducer switchbox and monitor the gate for valid responses above 30 percent FSH within the gate. If valid responses are detected refer to paragraph 3.B.(9).
August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 11 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

8 Record the maximum amplitude within the gate for each transducer. 9 Pull back the transducer assembly and turn it CCW FLA to the next castellation position. 1 0 Turn the shaft CW FLA to the 6 o’clock position. 1 1 Do paragraph 3.B.(7)(C)(6) thru paragraph 3.B.(7)(C)(10) until all 16 upper castellation positions are completed for transducers 1, 3, and 4. (8) C a l i b ra t i o n C h e c k (a) A calibration check must be done after the inspection. Also, do a check of the calibration when a system component or operator is changed, after loss of power, and when the operator fi nds a change in the system. (b) If the amplitude of the response from the side drilled hole of transducer 2 has increased to more than 10 percent FSH above the calibration amplitude, the system must be calibrated again before the inspection of additional hardware is done. Do an inspection again of rejected hardware examined since the last permitted calibration when the correct calibration is done. (c) If the amplitude of the response from the side drilled hole of transducer 2 has decreased to more than 10 percent FSH below the calibration amplitude, the system must be calibrated again. Do an inspection again of rejected hardware examined since the last permitted calibration when the correct calibration is done. CA U T I O N : IF THE ENGINE IS REMOVED FROM OPERATION TO PERFORM THIS INSPECTION, THE INSPECTION SURFACE AND SURROUNDING SURFAC ES MAY BE ABOVE AMBIENT TEMPERATURES. CHECK THE ASSEMBLY TO MAKE SURE THAT THERE IS SUFFICIENT COUPLING OF TRANSDUCER IN THE PROBE ASSEMBLY. IF NECESSARY, REMOVE THE TRANSDUCER AND APPLY MINERAL OIL TO THE TRANSDUCER FACE AND RE-SEAT THE TRANSDUCER IN THE PROBE ASSEMBLY. (d) If the amplitude of the backwall responses from the calibration standard for transducers 1, 3, and 4 at calibration gain + 3dB has fallen below 80 percent, the system must be calibrated again and all hardware examined since the last permitted calibration or calibration check must be examined again. (9) I n d i ca t i o n E va l u a t i o n (a) Any indication(s) that equals to or is more than 30 percent FSH must be evaluated as follows: 1 Make sure that the calibration is permitted. Refer to paragraph 3.B.(8). August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 12 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

2 Identify with which transducer the indication was associated. W

A R N I N G : REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT. 3 Clean the surface of the inspection area with a clean cloth to remove all oil and reapply fresh engine oil (C02-019) or engine oil (C02-023) to the inspection surface with the brush provided. 4 For transducer 2, do an inspection of the area in question again. If the indication is not more than 30 percent, then the indication is permitted. If the signal is equal to or is more than 30 percent FSH, inspect the suspect area again. If the indication is still present, repeat the inspection with a second operator if available to con fi rm that the indication is still present. If the indication is still present, contact GE PSE before continuing. Record the results on the data sheet Form 2194-1. Refer to Figure 15 . 5 For transducers 1, 3, or 4, do an inspection of the area in question again with the inspection gain at calibration gain + 3dB. If the indication is not more than 30 percent, then the indication is permitted. If the signal is equal to or is more than 30 percent FSH, inspect the suspect area again. If the indication is still present, repeat the inspection with a second operator if available to con fi rm that the indication is still present. If the indication is still present, contact GE PSE before continuing. Record the results on the data sheet Form 2194-1. Refer to Figure 15 . (10) D o c u m e n ta t i o n (a) All calibration and inspection data must be recorded on the appropriate log. Refer to Figure 15 . (b) Capture three screen shots of all indications that are 30 percent or greater, one from the indication, one from the screen display from the adjacent castellation slot CW and one from the screen display from the adjacent castellation slot CCW. 1 For the USMGo, freeze the screen as follows:
a Press down the F3 toggle switch (upper button on the lower toggle). An asterisk (*) icon will appear. 2 Press F4 for 2 seconds (lower button on lower toggle) until the screen image is saved. (c) Record the fi le name on the data sheet. (d) Forward Form 2194-1 along with supporting electronic fi les to the appropriate GE Representative. August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 13 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

C. I n s ta l l a t i o n (1) Install the nut lock plate (20-290, 72-00-02) and retainer ring (20-280) with the 11C3304 installation tool forward retainer and lock plate as follows. Refer to Figure 3. (a) Install the threaded guide (guide) (item 2) through the fan rotor disk (01-050, 72-22-00) as follows: 1 Turn the guide (item 2) into the forward end of the mid fan shaft (01-010, 72-58-00) until it is installed on the forward face of the vent center tube (01-020). (b) Install the nut lock plate (20-290, 72-00-02) onto the four tabs on the lockplate holder (item 10). N O T E : The lock plate holder is attached to the lockplate installer (item 4) with capscrews (item 13). (c) Install the lockplate installer (item 4), the lock plate holder (item 10), and the nut lock plate (20-290) on the guide (item 2). Use the matched marks to align the nut lock plate (20-290) outer diameter tabs with the castellations on the forward lock nut, and the inner diameter tabs with the castellations on the mid shaft fan (01-010, 72-58-00). (d) Install the lock plate installer nut (nut) (item 5) on the forward threaded end of the guide (item 2) until the lock plate installer (item 4) and the nut lock plate (20-290, 72-00-02) are against the forward lock nut (20-300). (e) Compress the retainer ring (20-280) outside diameter and put in the groove on the aft end of the snap ring holder (item 6). (f) Install the snap ring holder (item 6) onto the lock plate installer (item 4) and thread the snap ring nut (item 7) onto the forward end of the guide (item 2) to seat the snap ring holder (item 6) against the forward end of the forward lock nut (20-300). (g) Turn the snap ring nut (item 7) onto the forward end of the guide (item 2) to install the snap ring holder (item 6) against the forward end of the forward lock nut (20-300). (h) Install the snap ring pusher (pusher) (item 8) on the snap ring holder (item 6). (i) Align the pusher until the 12 pins on the aft end go through the 12 clearance holes in the snap ring holder (item 6). (j) Move the pusher (item 8) aft until you can see the threads on the guide (item 2). (k) Install the pusher nut (item 9) on the forward end of the guide (item 2) and tighten the pusher nut (item 9) until the 12 pins push the retainer
August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 14 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

ring (20-280) out of the snap ring holder (item 6) groove and it expands into the groove in the forward end of the forward lock nut (20-300). (l) Remove the 11C3304 installation tool forward retainer and lock plate. (m) Make sure that the nut lock plate (20-290) and retainer ring (20-280) are correctly installed in the forward lock nut (20-300). (2) Install the fan shaft cover (20-260) as follows. Refer to Figure 4. W

A R N I N G : REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT. (a) Use engine oil (C02-019) or engine oil (C02-023) to lubricate the lead-in chamfer and inner diameter of the forward fan shaft and a new packing (20-270). (b) Remove the 11C3084 fan disk bore protector or alternative. (c) Install the packing (20-270) onto the outer groove of the fan shaft cover (20-260). (d) Install the fan shaft cover (20-260) on the 11C3421 fan shaft cover fi xture as follows: 1 Align the tabs on the fan shaft cover (20-260) with the open slots on the removal cover (item 2). 2 Turn until the tabs touch the pins on the removal cover (item 2). (e) Lift the fan shaft cover (20-260) with the removal cover (item 2) and put the fan shaft cover into the forward fan shaft (01-170, 72-24-00). (f) Push on the center of the fan shaft cover (20-260, 72-00-02) with the 11C3421 fan shaft cover fi xture to fully install the fan shaft cover (20-260). N O T E : A rubber mallet can be used to tap on the removal cover (item 2) to install the fan shaft cover. (g) Remove the removal cover (item 2) from the fan shaft cover (20-260). (h) Use a shop light to do an inspection of the packing (20-270) to make sure that the packing is in the correct position (not visible). (i) Compress the retaining ring (20-250) to install it into the groove in the inner side of the bore of the forward fan shaft (01-170, 72-24-00). (j) Let the retaining ring (20-250, 72-00-02) expand into the groove. (k) Make sure that the retaining ring (20-250) is correctly installed. August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 15 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

(l) Use a shop light to do an inspection for damage, FOD, and unwanted oil of the fan rotor bore and face of disk, including tool interface locations. (3) Install the fan spinner (20-010, 72-00-00) and the spinner assembly aft support ring (20-101). (a) If the installation process of the spinner fan and the spinner assembly aft support ring is done on wing, refer to GEnx-2B Boeing 747 AMM 72-22-01. (b) If the installation process of the spinner fan and the spinner assembly aft support ring is done in shop, refer to GEnx-2B EM, 72-00-01, INSTALLATION 001, Subtask 72-00-01-420-020, and to GEnx-2B EM, 72-00-01, INSTALLATION 001, Subtask 72-00-01-420-019.

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 16 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

RETAINING RING (20-250) FORWARD FAN SHAFT (01-170, 72-24-00)

FAN SHAFT COVER (20-260) MID FAN SHAFT (01-010, 72-58-00)

PACKING (20-270)

NOTES: 1. ALL IPC REFERENCES FROM 72-00-02 UNLESS SPECIFIED DIFFERENTLY. 2. SOME ITEMS NOT SHOWN FOR CLARITY. 1366800-00 Removal of the Retaining Ring and Forward Fan Shaft Cover Figure 1, ( Sheet 1 of 2 )

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 17 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft



## A-A FORWARD FAN SHAFT (01-170, 72-24-00)

MID FAN SHAFT (01-010, 72-58-00) FAN ROTOR DISK (01-050, 72-22-00)

13

2 3 12 FAN SHAFT COVER (20-260)

LEGEND: 2. REMOVAL COVER 3. TORQUE ARM PLATE 12. CROSS BAR PULLER 13. HAND KNOB 14. SLEEVE 15. LOCK PINS NOTES: 1. ALL IPC REFERENCES FROM 72-00-02 UNLESS SPECIFIED DIFFERENTLY. 2. ITEM NUMBERS AGREE WITH ITEM NUMBERS OF TOOL, 11C3421. 1366801-00 

### A

14 15 

### A

Removal of the Retaining Ring and Forward Fan Shaft Cover Figure 1, ( Sheet 2 )

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 18 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

NOTE: ALL IPC REFERENCES FROM 72-00-02 UNLESS SPECIFIED DIFFERENTLY. NUT LOCK PLATE (20-290)

RETAINER RING (20-280) FORWARD LOCK NUT (20-300) MID FAN SHAFT (01-010, 72-58-00)



## A A

1366802-00 Removal of the Retainer Ring and Nut Lock Plate Figure 2

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 19 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

RETAINER RING (20-280)

LEGEND: 2. GUIDE 4. LOCKPLATE INSTALLER 5. NUT 6. SNAP RING HOLDER 7. SNAP RING NUT 8. PUSHER 9. PUSHER NUT 10. LOCKPLATE HOLDER 13. CAPSCREW NOTES: 1. ALL IPC REFERENCES FROM 72-00-02 UNLESS SPECIFIED DIFFERENTLY. 2. ITEM NUMBERS AGREE WITH ITEM NUMBERS OF TOOL, 11C3304. 3. FORWARD LOCK NUT (20-300) IS ALREADY INSTALLED. 2 FAN BOOSTER ASSEMBLY (20-010)

5

7

9 6

8 4 10 13 (4 LOCATIONS) NUT LOCK PLATE (20-290) FORWARD LOCK NUT (20-300)

1366803-00 Installation of the Lock plate and the Retainer Ring Figure 3

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 20 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

RETAINING RING (20-250) PACKING (20-270)

FAN SHAFT COVER (20-260) 2 3

13 12 FAN BOOSTER ASSEMBLY (20-010) LEGEND: 2. REMOVAL COVER 3. TORQUE ARM PLATE 12. CROSS BAR PULLER 13. HAND KNOB NOTES: 1. ALL IPC REFERENCES FROM 72-00-02 UNLESS SPECIFIED DIFFERENTLY. 2. ITEM NUMBERS AGREE WITH ITEM NUMBERS OF TOOL, 11C3421. 3. ITEMS 3, 12, AND 13 NOT REQUIRED FOR INSTALLATION OF THE FORWARD FAN SHAFT COVER.

1366804-00 Installation of the Forward Fan Shaft Cover Figure 4

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 21 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

FORWARD FAN SHAFT (01-170, 72-24-00) MID FAN SHAFT (01-010) CENTER VENT TUBE (01-020)

INSPECTION TARGET LOCATION

1366805-00 

## A-A A

A

NOTE: ALL IPC REFERENCES FROM 72-58-00 UNLESS SPECIFIED DIFFERENTLY. Crack Location in the Mid Fan Shaft Figure 5

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 22 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

1366806-00 1 2 3 4 1 2 3 4 

### A B



## A INSPECTION COVERAGE TRANDUCER #1 - UPPER CASTELLATION

-RIGHT SIDE TRANDUCER #2 - BOTTOM CASTELLATION TRANDUCER #3 - UPPER CASTELLATION

-LEFT SIDE TRANDUCER #4 - UPPER CASTELLATION - CENTER TRANSDUCER SWITCHBOX 1 2 3
4



## B INSPECTION FIXTURE

Inspection Fixture Figure 6

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 23 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

1366807-00 FIRST DELAY MULTIPLE SECOND DELAY MULTIPLE

THIRD DELAY MULTIPLE

Delay Multiples Figure 7

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 24 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

1366808-00 SECOND DELAY MULTIPLE

THIRD DELAY MULTIPLE

Positioning of Delay Multiples Figure 8

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 25 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

1366809-00 SIDE DRILL HOLE RESPONSE SET TO 80% STANDARD

Transducer 2 Sensitivity Figure 9

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 26 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

1366810-00 STANDARD BACK SURFACE RESPONSE AT CALIBRATION + 3dB 80% OR GREATER

Transducer 1,3 and 4 Sensitivity Figure 10

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 27 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

1366811-01 GATE 3.2-5.0 THRESHOLD 30%

Transducer 2 Figure 11

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 28 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

1366812-00 GATE 5.5 - 7.0 THRESHOLD 30%

Gate - Transducer 1,3,4 Figure 12

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 29 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

FORWARD FAN SHAFT (01-170, 72-24-00)

MID FAN SHAFT (01-010) FAN ROTOR DISK (01-050, 72-22-00)

NOTE: ALL IPC REFERENCES FROM 72-58-00 UNLESS SPECIFIED DIFFERENTLY. 1366813-00 Engine Access Figure 13

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 30 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

GAIN RANGE VEL DISPLAY DELAY PROBE DELAY FREQUENCY REJECT RECTIFICATION DUAL PULSER TYPE PULSER ENERGY DAMPING VOLTAGE PRF MODE 50 dB 5.000 0.2323 in/us 0.00 0.00 10 MHz 0% FULLWAVE OFF SPIKE LOW 50 OHM HIGH AUTO LOW 400 HZ USM GO TABLE 1. BASIC INSTRUMENT SETTINGS.

MAIN MENU FILE NAME ACTION REPORT IMAGE IN REPORT PARAM IN REPORT VIDEO SOURCE/DEST CONFIG2 FUNCTION1 FUNCTION2 FMS STORE REPORT
YES YES
SD CARD
FREEZE/NONE NONE/COPY

1366814-00 Preliminary Instrument Settings Figure 14

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 31 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Mid Fan Shaft Assembly (72-58-00) - Inspection of Mid Fan Shaft

FORM 2194-1 CALIBRATION AND INSPECTION LOG DATE: SITE: ENGINE SN INSPECTOR INSTRUMENT S/N INSPECTION FIXTURE SN STANDARD S/N:

CASTELLATION TRAN 2 TRANS 1 TRANS 3 TRANS 4 COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 POST CALIBRATION: ACCEPT / REJECT DISPOSITION: ACCEPT / REJECT (CIRCLE ONE) INSPECTOR: COMMENTS: DATE: FILE NAME

INSPECTION GAIN TRANS 2 (CAL) INSPECTION GAIN TRANS 1/3/4 CAL +3 dB RANGE VEL DISPLAY DELAY PROBE DELAY

1366815-00 Form 2194-1 - Calibration and Inspection Log Figure 15

August 22, 2012 GEnx-2B S/B 72-0091 Revision 01, September 14, 2012 PAGE 32 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.