### Commercial Airplane Group 

# 737 Service Bulletin

Number: 737-78-1063 

## Revision Transmittal Sheet Date: September 24, 1998 Revision 2: October 7, 1999 ATA System: 7831

SUBJECT:EXHAUST - Thrust Reverser - Inner Wall Blanket Insulation Change

y This revision includes all pages of the service bulletin. COMPLIANCE INFORMATION RELATED TO THIS REVISION More work is required to replace the CSR924C5EA3 rivets with the CSR904B5E5 rivets and NAS1149CN0316R washers with NAS1149CN316R washers if the intent of the initial release was successfully accomplished. REASON FOR REVISION This revision is sent to: 1. Change the rivet part number which was listed as CSR924C5EA3 to CSR904B5E5 in Paragraph 2.C.1., Parts Necessary For Each Airplane and Figure 4, Step 1. 2. Change the washer part number which was listed as NAS1149CN0316R to NAS1149CN316R in Paragraph 2.C.1., Parts Necessary For Each Airplane and Figure 3, Steps 11, 14, and 19. 3. Provide references for the ASP fasteners installation and the location information for bracket assemblies installation. 4. Remove the MA 25 (Crown-Metro) sealant at all locations throughout the service bulletin. The data given in Information Notice 737-78-1063 IN 02 is included in this revision. Paragraph 1.A., Effectivity, shows changes of airplane operators. Each operator should examine the Effectivity paragraph for changes. Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location of important changes. Pages with no vertical lines have no important changes. REVISION HISTORY Original Release: September 24, 1998 Revision 1: February 18, 1999 Revision 2: October 7, 1999

737-78-1063 Revision Transmittal Page 1 of 1

### Commercial Airplane Group 

# 737 Service Bulletin

Number: 737-78-1063 

## Summary Date: September 24, 1998 Revision 2: October 7, 1999 ATA System: 7831

SUBJECT:EXHAUST - Thrust Reverser - Inner Wall Blanket Insulation Change

CONCURRENT REQUIREMENTS None BACKGROUND This service bulletin gives instructions for installing an improved insulation blankets on the thrust reverser inner wall. This change will prevent possible structural damage due to engine core air getting around the insulation blanket edges of the thrust reverser inner wall. At Boeing, it was found that when engine ground testing, the thrust reverser inner wall temperatures were exceeding design limits. The problem was caused by engine core air getting around the insulation blanket edges and impinging on the inner wall of the thrust reverser. This condition may cause overheating in an area that can not be easily accessed. ACTIONPRR 38203R On both engines, replace the old insulation blankets with the new improved insulation blankets. Apply adhesive (Silicone) RTV 106 space between the insulation blanket and compression pad spacer. EFFECTIVITY(737-600/-700/-800 Airplanes) See service bulletin effectivity. COMPLIANCE No compliance time is given. INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are available for airplanes in warranty as of July 18, 1997. Please refer to Paragraph 2.B., Industry Support Information. MANPOWER Per Engine Total Man-HoursElapsed Time (Hours) 30.25 15.25
MATERIAL INFORMATION Boeing Supplied Kits Refer to Paragraph 2.A., Material - Price and Availability.

737-78-1063 Summary Page 1 of 2

### BOEING SERVICE BULLETIN 737-78-1063



### LOWER INSULATION BLANKETS REPLACE THE UPPER AND

RTV 106 APPLY

LEFT SIDE SHOWN, RIGHT SIDE SIMILAR FWDS52806

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 Summary Page 2 of 2

### Commercial Airplane Group 

# 737 Service Bulletin

Number: 737-78-1063 Date: September 24, 1998 Revision 2: October 7, 1999 ATA System: 7831

SUBJECT:EXHAUST - Thrust Reverser - Inner Wall Blanket Insulation Change

1. PLANNING INFORMATION A. Effectivity 1. Airplanes Refer to Service Bulletin Index Document D6-19567, Part 3 for Airplane Variable Number, Line Number, and Serial Number data. This service bulletin is for the airplanes shown below. An equivalent change is on subsequent production airplanes. Refer to PRR 38203R for data about this change. Airplane Models: 737-600 737-700 737-800 IDENTIFICATION BY CUSTOMER, CUSTOMER CODE AND VARIABLE NUMBER AIR BERLIN (BER) YC051 BRAATHENS (BRT) YA311 BWIA INTERNATIONAL AIRWAYS (TTA) YA301 CONTINENTAL AIRLINES (CAL) YA501-YA503 GERMANIA (GER) YA231-YA240 HAPAG-LLOYD FLUG (HAP) YC001-YC004 LAPA ARGENTINA (LAZ) YA302 MAERSK AIR (MRS) YA201-YA203 SAS (SAS) YE002

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 Page 1 of 38

### BOEING SERVICE BULLETIN 737-78-1063

SHANGHAI AIRLINES (SHA) YA312 SOUTHWEST AIRLINES (SWA) YA002-YA011 YA024 TRANSAERO AIRLINES (TRX) YA251-YA252
IDENTIFICATION BY VARIABLE NUMBER YA002-YA011 YA024 YA201-YA203 YA231-YA240 YA251-YA252 YA301-YA302 YA311-YA312 YA501-YA503 YC001-YC004 YC051 YE002 2. Spares None

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 2

### BOEING SERVICE BULLETIN 737-78-1063

B. Concurrent Requirements None C. Reason This service bulletin gives instructions for installing an improved insulation blankets on the thrust reverser inner wall. This change will prevent possible structural damage due to engine core air getting around the insulation blanket edges of the thrust reverser inner wall. At Boeing, it was found that when engine ground testing, the thrust reverser inner wall temperatures were exceeding design limits. The problem was caused by engine core air getting around the insulation blanket edges and impinging on the inner wall of the thrust reverser. This condition may cause overheating in an area that can not be easily accessed. Revision 1 is sent to change the INDUSTRY SUPPORT INFORMATION on the Summary page and Paragraph 2.B., Industry Support Information. INDUSTRY SUPPORT INFORMATION on the Summary page should read as follows: Boeing warranty remedies are available for airplanes in warranty as of July 18, 1997. Please refer to Paragraph 2.B., Industry Support Information. Industry Support Information on Paragraph 2.B., should read as follows: Boeing warranty remedies are available for 737 airplanes in warranty as of July 18, 1997. For man-hour reimbursement for airplanes in warranty as of that date, send a warranty claim to Boeing Product Assurance Contracts. The kits for airplanes in warranty as of that date will be supplied at no charge. Send a purchase order for the kits to Boeing Spares. Please refer to this service bulletin number and reference the airplane variable number in your purchase order. Also, in Paragraph 2.A., Material - Price and Availability is changed from "Charge" to "No Charge". Revision 2 is sent to: 1. Change the rivet part number which was listed as CSR924C5EA3 to CSR904B5E5 in Paragraph 2.C.1., Parts Necessary For Each Airplane and Figure 4, Step 1. 2. Change the washer part number which was listed as NAS1149CN0316R to NAS1149CN316R in Paragraph 2.C.1., Parts Necessary For Each Airplane and Figure 3, Steps 11, 14, and 19. 3. Provide references for the ASP fasteners installation and the location information for bracket assemblies installation. 4. Remove the MA 25 (Crown-Metro) sealant at all locations throughout the service bulletin. The data given in Information Notice 737-78-1063 IN 02 is included in this revision. D. Description On both engines, replace the old insulation blankets with the new improved insulation blankets. Apply adhesive (Silicone) RTV 106 space between the insulation blanket and compression pad spacer. Revision 1 - No more work is necessary on airplanes changed as shown in the initial release of this service bulletin.

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 3

### BOEING SERVICE BULLETIN 737-78-1063

Revision 2 - More work is required to replace the CSR924C5EA3 rivets with the CSR904B5E5 rivets and NAS1149CN0316R washers with NAS1149CN316R washers if the intent of the initial release was successfully accomplished. An evaluation form is attached to this service bulletin. Please use this form to tell us what you think of the quality of this service bulletin. E. Compliance No compliance time is given. F. Approval This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable Federal Aviation Regulations (FAR) and are FAA approved. This service bulletin and the FAA approval were based on the airplane in its original Boeing delivery configuration or as modified by other FAA approved Boeing changes. If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin. G. Manpower The table below shows an estimate of the man-hours necessary to do this change for each engine. This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator man-hour data if necessary. The estimate does not include lost time. These are some examples of lost time: - Time to adjust to the workplace - Time to schedule the work - Time to examine the work - Time to cure the materials - Time to find the tools. Task Number of Persons Man-Hours Elapsed Time (Hours) Prepare 1 .25 .25 Open Access 2 5.0 2.5 Change 2 18.0 9.0 Close Access 2 5.0 2.5 Test 2 2.0 1.0 TOTAL FOR EACH ENGINE 30.25 15.25 H. Weight and Balance Changes Change in Weight (Pounds) Change in Moment (Pound-Inches) +10.0 +5,821.0
I. Electrical Load Data Not applicable

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 4

### BOEING SERVICE BULLETIN 737-78-1063

J. References 1. Existing Data: a. Engineering Change Memo PRR 38203R b. 737-600/-700/-800 Maintenance Manual (AMM) Subjects 78-31-01, 78-31-13 c. Boeing Standard Wiring Practices Manual (BSWPM) (20-00-13, 20-10-11, 20-10-12) d. Boeing Standard Overhaul Practices Manual (BSOPM) 20-50-12 2. Drawings supplied in support of this revision: Drawing Number Sheet DCN ADCN Title 315T3558 1 G -- Fastener Installation Adjustable Clamping Force Positive Lock 1.1 C -- 1.2 D -- 1.3 E -- 1.4 F -- 1.5 G -- 2 G -- 3 E -- 4 F -- 5 -- -- 6 F -- 7 D -- 8 -- -- 9 E -- 10 F -- 11 G -- 302A2100 1 A -- Top Kit - Blanket Replacement 3. Installation Drawings: None K. Publications Changed Publication Chapter-Section 737-600/-700/-800 Maintenance Manual............78-31 Overhaul Manual...............................78-31

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 5

### BOEING SERVICE BULLETIN 737-78-1063

L. Interchangeability and Intermixability of Parts Refer to Paragraph 2.E., Existing Parts Accountability, for interchangeability and intermixability information.

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 6

### BOEING SERVICE BULLETIN 737-78-1063

2. MATERIAL INFORMATION A. Material - Price and Availability Boeing can supply the kits shown in Paragraph 2.C., Parts Necessary For Each Airplane, as shown below. Kit availability is shown in the Reorder Lead Time (ROLT). ROLT is calculated from the date Boeing gets the purchase order. Kit Number Name ROLT (weeks) Unit Price 302A2100-1 Kit 45 No Charge 302A2100-2 Kit 45 No Charge B. Industry Support Information Boeing warranty remedies are available for 737 airplanes in warranty as of July 18, 1997. For man-hour reimbursement for airplanes in warranty as of that date, send a warranty claim to Boeing Product Assurance Contracts. The kits for airplanes in warranty as of that date will be supplied at no charge. Send a purchase order for the kits to Boeing Spares. Please refer to this service bulletin number and reference the airplane variable number in your purchase order. C. Parts Necessary For Each Airplane 1. Kits: To get the kits shown below, refer to Paragraph 2.A., Material - Price and Availability. NOTE: One top kit is necessary for each engine. 302A2100 TOP KIT - BLANKET REPLACEMENT -2 -1 QTY Part Number Name . - 302A2100-1 Top Kit (Blanket, Left Side) - . 302A2100-2 Top Kit (Blanket, Right Side) . 1 S315A213-43 Blanket 1 . S315A213-44 Blanket . 1 S315A213-45 Blanket 1 . S315A213-46 Blanket 1 1 315A2107-4 Spacer 3 3 315A2107-5 Spacer 1 1 315A2107-6 Spacer . 1 315A2134-109 Bracket Assembly 1 . 315A2134-110 Bracket Assembly . 1 315A2134-113 Bracket Assembly . . 315A2134-114 Bracket Assembly . 1 315A2134-117 Bracket Assembly 1 . 315A2134-118 Bracket Assembly . 1 315A2134-121 Bracket Assembly 1 . 315A2134-122 Bracket Assembly

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 7

### BOEING SERVICE BULLETIN 737-78-1063

(Continued) 302A2100 TOP KIT - BLANKET REPLACEMENT -2 -1 QTY Part Number Name . 1 315A2134-125 Bracket Assembly 1 . 315A2134-126 Bracket Assembly . 1 315A2134-129 Bracket Assembly 1 . 315A2134-130 Bracket Assembly 2 2 315A2134-133 Bracket Assembly 12 12 315A2134-134 Bracket Assembly

. 1 315A2172-39 Bracket Assembly . . 315A2172-40 Bracket Assembly . 1 315A2172-43 Bracket 1 . 315A2172-44 Bracket . 1 315A2172-45 Bracket Assembly 1 . 315A2172-46 Bracket Assembly 1 315A2172-49 Bracket Assembly 1 . 315A2172-50 Bracket Assembly . 1 315A2172-55 Bracket 1 . 315A2172-56 Bracket . 1 315A2173-41 Retainer . 1 315A2173-46 Retainer 40 40 315W1163-26 (a) Washer 30 30 315W1163-54 (a) Washer 1 1 ASPFPV06-12AC (b) Pin 1 1 ASPFPV06-15AC (b) Pin 22 22 ASPFSV06 (a) (b) Sleeve 24 24 ASPLC2AC06 (a) (b) Lock Collar 1 1 ASPPFV06-17AC (b) Pin 1 1 ASPPFV06-20AC (b) Pin 20 20 ASPPFV06-21AC (a) (b) Pin 1 1 BACB30LK2U3 Bolt 1 1 BACB30NW6K13 Bolt 2 2 BACB30NW6K14 Bolt 3 3 BACB30NW6K15 Bolt 2 2 BACB30NW6K16 Bolt 3 3 BACB30NW6K17 Bolt 3 3 BACB30NW6K18 Bolt 2 2 BACB30NW6K19 Bolt 4 4 BACB30NW6K2 Bolt 3 3 BACB30NW6K20 Bolt 3 3 BACB30NW6K21 Bolt

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 8

### BOEING SERVICE BULLETIN 737-78-1063

(Continued) 302A2100 TOP KIT - BLANKET REPLACEMENT -2 -1 QTY Part Number Name 3 3 BACB30NW6K22 Bolt 1 1 BACB30NW6K23 Bolt 1 1 BACB30NW6K24 Bolt 2 2 BACB30NW6K5 Bolt 1 1 BACB30NW6K6 Bolt . 1 BACB30NY6K21 Bolt 4 4 BACB30NY6K4 Bolt 1 1 BACB30NY6K6 Bolt 1 1 BACB30NY6K8 Bolt 2 2 BACN10YT08CS (a) Nut 12 12 BACN10YT3CS (a) Nut 28 28 BACN10ZZ3D (a) Nut 7 7 BACR15CE4M3 (a) Rivet 3 3 BACR15CE5M3 (a) Rivet 5 5 BACR15FP5MP2R (a) Rivet 8 8 BACR15FR5MP2R (a) Rivet 6 6 BACR15FR5M2R (a) Rivet 26 26 CSR904B5E5 (a) Rivet 6 6 KFN511DL3 (c) Collar 16 16 MS20615-5M (a) Rivet

. 7 NAS1149CN316R (a) Washer . 4 NAS1149CN416R (a) Washer 30 30 0090-13365 (a) Nut, Self Locking 2 2 2ASPPSV06 (b) Sleeve (a) Quantity shown in excess of installation requirement. (b) Huck Manufacturing Corporation, Aerospace Fastener Division (V17446) 900 Watson Center Road Carson, California 90745 (c) Kaynar Technology Kaynar Division (V15653) 800 South State College Boulevard P. O. Box 3001 Fullerton, California 92634-3001

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 9

### BOEING SERVICE BULLETIN 737-78-1063

2. Parts and Materials Supplied by the Operator: QTY Part Number (Specification) Name

As RequiredBMS 5-63 (a) (c) Firewall Sealant As RequiredRTV 106 (b) Sealant, Silicone (a) D Aircraft Products Company (V58093) 1191 Hawk Circle Anaheim, California 92708 (b) General Electric Company (V01139) Silicone Products Business Department Hudson River Road Waterford, New York 12188 (c) See the Qualified Products List at the end of the Boeing Material Specification (BMS) for supplier data. D. Parts Necessary to Change Spares None E. Existing Parts Accountability The parts shown below are changed as shown in this service bulletin. Quantity (QTY) is the number of parts changed on each airplane.

Existing Part Number RUCName QTY New Part Number PNCRC S315A213-25 DISInsulation Blanket (Left Side, Upper) 1 S315A213-43 R A S315A213-26 DISInsulation Blanket (Right Side, Upper) 1 S315A213-44 R A S315A213-27 DISInsulation Blanket (Left Side, Lower) 1 S315A213-45 R A S315A213-28 DISInsulation Blanket (Right Side, Lower) 1 S315A213-46 R A

RUC Recommended Use Code DIS - Discard the part. PNC Part Number Code R - This is the part number after the change given in this service bulletin. RC Replacement Code A - Do not use the existing part to replace the new or changed part. F. Special Tooling - Price and Availability The operator can supply the tools shown in Paragraph 2.G., Special Tooling Necessary to do this Service Bulletin. Tool price and supply data are not given.

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 10

### BOEING SERVICE BULLETIN 737-78-1063

G. Special Tooling Necessary to do this Service Bulletin To get the tools shown below, refer to Paragraph 2.F., Special Tooling - Price and Availability. Maintenance and overhaul tools in the manuals shown in Paragraph 1.J., References, can also be necessary. Examine operator tool supply to make sure all necessary tools are available. Tool Kit Number Name 106524 (a) Sleeve Driver 352 (a) Installation Tool 99-895 (a) Nose Assembly (a) Huck Manufacturing Corporation, Aerospace Fastener Division (V17446) 900 Watson Center Road Carson, California 90745

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 11

### BOEING SERVICE BULLETIN 737-78-1063

BLANK PAGE

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 12

### BOEING SERVICE BULLETIN 737-78-1063

3. ACCOMPLISHMENT INSTRUCTIONS GENERAL NOTES 1. The paragraphs identified with a letter give the general work instructions. The instructions identified with numbers on the figures give the recommended sequence of steps. 2. Unless shown differently, these dimensions and tolerances are used: - Linear dimensions are in inches - Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03

inch - Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch - Angular tolerance is plus or minus 2 degrees - Hole dimensions for standard solid rivets are given in 737 Structural Repair Manual, Chapter 51 - Torque limits to tighten nuts and bolts are given in 737 Structural Repair Manual, Chapter 51. 3. Alternative fasteners are given in 737 Structural Repair Manual, Chapter 51. 4. Obey all of the warnings and cautions given in the specified manual sections. WORK INSTRUCTIONS A. On both engines, remove the thrust reversers. Refer to 737-600/-700/-800 Maintenance Manual (AMM) 78-31-01. B. Remove the insulation blankets. Refer to Figure 1 or 737-600/-700/-800 Maintenance Manual (AMM) Subject 78-31-13. C. Remove the upper support brackets. Refer to Figure 2. D. Install the upper support brackets. Refer to Figure 3. E. Change the upper / lower support brackets. Refer to Figure 4. F. Remove the lower support brackets. Refer to Figure 5. G. Install the lower support brackets. Refer to Figure 6. H. Install the insulation blankets. Refer to Figure 7 or 737-600/-700/-800 Maintenance Manual (AMM) Subject 78-31-13. I. Part mark that service bulletin 737-78-1063 has been done on the thrust reverser fan duct cowl. Refer to Boeing Standard Overhaul Practices Manual 20-50-10. J. Re-install the thrust reversers. Refer to 737-600/-700/-800 Maintenance Manual (AMM) 78-31-01. K. Put the airplane back to a serviceable configuration.

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 13

### BOEING SERVICE BULLETIN 737-78-1063

FIGURE TABLE OF CONTENTS Title Page FIGURE 1. LEFT AND RIGHT THRUST REVERSER INSULATION BLANKET REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) . . .. . . . . . . . 15 FIGURE 2. LEFT AND RIGHT UPPER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 FIGURE 3. LEFT AND RIGHT UPPER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 FIGURE 4. LEFT AND RIGHT UPPER/LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS MODIFICATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR).. . . . . . . . . . . . . . . . . . . . 24 FIGURE 5. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 FIGURE 6. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 FIGURE 7. LEFT AND RIGHT THRUST REVERSER INSULATION BLANKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

September 24, 1998 737-78-1063 Revision 2: October 7, 1999 14

### BOEING SERVICE BULLETIN 737-78-1063



### 4 3 1

3

6

2 2 5

5

FWD 21 PLACESS52792

FIGURE 1. LEFT AND RIGHT THRUST REVERSER INSULATION BLANKET REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 1 OF 2 737-78-1063 Revision 2: October 7, 1999 15

### BOEING SERVICE BULLETIN 737-78-1063

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for half of thrust reverser.

STEP TASK NAME PART NUMBER QTY NOTES NOTE: Remove sealant bond with a knife. 1 Remove / Keep Nut Washer 0090-13365 315W1163-54 21 21 -- 2 Remove / Keep Nut Washer BACS12GU3K10 315W1163-26 6 6 -- 3 Remove / Keep Nut Washer BACS12GU3K12 315W1163-26 3 3 -- 4 Remove / Keep Nut Washer BACN10YR3C 315W1163-26 1 1 -- 5 Remove / Keep Nut Washer BACS12GU3K16 315W1163-26 8 8 -- 6 Remove / Discard Upper Insulation Blanket (Left Side) S315A213-25 1
-- Lower Insulation Blanket (Left Side) S315A213-27 1

FIGURE 1. LEFT AND RIGHT THRUST REVERSER INSULATION BLANKET REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 2 OF 2 737-78-1063 Revision 2: October 7, 1999 16

### BOEING SERVICE BULLETIN 737-78-1063



### A A

FWDS52958

FIGURE 2. LEFT AND RIGHT UPPER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 1 OF 3 737-78-1063 Revision 2: October 7, 1999 17

### BOEING SERVICE BULLETIN 737-78-1063



### 8 7 6 5 4 3



## A-A 2 1

FWD FITTING - HINGE BEAM

PANEL ASSEMBLY AFT COWLS54135

FIGURE 2. LEFT AND RIGHT UPPER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 2 OF 3 737-78-1063 Revision 2: October 7, 1999 18

### BOEING SERVICE BULLETIN 737-78-1063

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for half of thrust reverser.

STEP TASK NAME PART NUMBER QTY NOTES 1 Remove / Discard Bracket Assembly 315A2172-1 (Left Side) and 315A2172-2 (Right Side) 1 1 --

2 Remove / Keep Fastener
-- -- Remove only fasteners attached on retainer - fire seal support 315A2173-7 (left side) and 315A2173-8 (right side). 3 Remove / Discard Bracket Assembly 315A2134-17 (Left Side) and 315A2134-18 (Right Side) 1 1 --

4 Remove / Discard Bracket Assembly 315A2134-29 (Left Side) and 315A2134-30 (Right Side) 1 1 --

5 Remove / Discard Bracket Assembly315A2134-105 (Left Side) and 315A2134-106 (Right Side) 1 1 --

6 Remove / Discard Fastener
-- 3 Remove fasteners only. Do not remove fire seal support bracket 315A2172-3. 7 Remove / Discard Fastener
-- 1 Remove fastener only. Do not remove fire seal support bracket 315A2172-3. 8 Remove / Discard Bracket Assembly 315A2134-33 (Left Side) and 315A2134-34 (Right Side) 1 1 Remove bracket assembly then install bolt BACB30NW6K5 and nut BACN10YT3CS to fill open hole. Install wet with BMS 5-63 as specified in Boeing Standard Overhaul Practices Manual 20-50-12. Torque to 25-35 in-lb.

FIGURE 2. LEFT AND RIGHT UPPER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 3 OF 3 737-78-1063 Revision 2: October 7, 1999 19

### BOEING SERVICE BULLETIN 737-78-1063



### 21 A A

FWDS53051

FIGURE 3. LEFT AND RIGHT UPPER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 1 OF 4 737-78-1063 Revision 2: October 7, 1999 20

### BOEING SERVICE BULLETIN 737-78-1063



### 18



## B-B A-A 20 9 19 12 17 1416 15 13

10 11 7 8 6

5 1
4 3 2

INBD FITTING - HINGE BEAM

ASSEMBLY PANEL AFT COWL

FWD B

BS54061

FIGURE 3. LEFT AND RIGHT UPPER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 2 OF 4 737-78-1063 Revision 2: October 7, 1999 21

### BOEING SERVICE BULLETIN 737-78-1063

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for half of thrust reverser. STEP TASK NAME PART NUMBER QTY NOTES 1 Install Bracket Assembly 315A2172-45 (Left Side) and 315A2172-46 (Right Side) 1 1 --

2 Install Bolt Nut BACB30NY*K* BACN10YT*CS 1 1 Install wet with BMS 5-63 as specified in Boeing Standard Overhaul Practices Manual Chapter 20-50-12. Torque 25 to 35 in-lb. 3 Install Bolt Nut BACB30NW*K* BACN10YT*CS 1 1 Install wet with BMS 5-63 as specified in Boeing Standard Overhaul Practices Manual Chapter 20-50-12. Torque 25 to 35 in-lb. 4 Install Bolt Nut BACB30NW*K* BACN10YT*CS 3 3 Install wet with BMS 5-63 as specified in Boeing Standard Overhaul Practices Manual Chapter 20-50-12. 5 Install Bolt Nut BACB30NW*K* BACN10YT*CS 1 1 Install wet with BMS 5-63 as specified in Boeing Standard Overhaul Practices Manual Chapter 20-50-12. 6 Install / Kept Fastener
-- -- Fay surface seal with BMS 5-63. Ensure a small fillet seal is formed to contact squeeze out from fay surface seal. 7 Install Rivet BACR15FR*M*R 4 Drill from pilot hole in retainer 315A2173-7 to .1760 - .1800 inch diameter. 8 Install Rivet BACR15CE*M* 1 Drive deformed side of rivet a minimum of 1.5 times nominal shank diameter. 9 Install Bracket Assembly315A2134-121 (Left Side) and 315A2134-122 (Right Side) 1 1 Drill hole .2030 - .2080 inch diameter countersink far side. Fay surface seal with BMS 5-63 as specified in Boeing Standard Overhaul Practices Manual Chapter 20-50-12. Refer to Drawing 315T3558 for ASP fasteners installation. Pin Sleeve Lock Collar ASPPFV06-21AC ASPFSV06 ASPLC2AC06 2 2 2 10 Install Bracket Assembly315A2134-113 (Left Side) and 315A2134-114 (Right Side) 1 1 Drill hole .2030 - .2080 inch diameter countersink far side. Fay surface seal with BMS 5-63 as specified in Boeing Standard Overhaul Practices Manual Chapter 20-50-12. Refer to Drawing 315T3558 for ASP fasteners installation. Pin Sleeve Lock Collar ASPPFV06-21AC ASPFSV06 ASPLC2AC06 2 2 2

FIGURE 3. LEFT AND RIGHT UPPER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 3 OF 4 737-78-1063 Revision 2: October 7, 1999 22

### BOEING SERVICE BULLETIN 737-78-1063

(Continued) STEP TASK NAME PART NUMBER QTY NOTES

11 Install Washer NAS1149CN316R 1
-- 12 Install Bracket Assembly315A2134-109 (Left Side) and 315A2134-110 (Right Side) 1 1 Fay surface seal with BMS 5-63 as specified in Boeing Standard Overhaul Practices Manual Chapter 20-50-12. 13 Install Bolt Nut BACB30NW6K24 BACN10YT3CS 1 1 -- 14 Install Pin Sleeve Lock Collar ASPPFV06-21AC ASPFSV06 ASPLC2AC06 1 1 1 Drill hole .2030 - .2080 inch diameter countersink far side. Refer to Drawing 315T3558 for ASP fasteners installation. Washer NAS1149CN316R 1 Near side. 15 Fill Gap
-- BMS 5-63
-- Fillet seal to promote drainage, remove excess sealant. 16 Fay Surface Seal -- BMS 5-63
-- Ensure a small fillet seal is formed to contact squeeze out from fay surface seal. 17 Install Bracket Assembly315A2134-117 (Left Side) and 315A2134-118 (Right Side) 1 1 Drill hole .2030 - .2080 inch diameter countersink far side. Fay surface seal with BMS 5-63 as specified in Boeing Standard Overhaul Practices Manual Chapter 20-50-12. Refer to Drawing 315T3558 for ASP fasteners installation. Pin Sleeve Lock Collar ASPPFV06-21AC ASPFSV06 ASPLC2AC06 3 3 3 18 Install Bracket Assembly 315A2172-49 (Left Side) and 315A2172-50 (Right Side) 1 1 --

Rivet BACR15FR5MP2R 7 19 Install Pin Sleeve Lock Collar ASPPFV06-20AC ASPFSV06 ASPLC2AC06 1 1 1 Drill hole .2030 - .2080 inch diameter countersink far side. Refer to Drawing 315T3558 for ASP fasteners installation. Washer NAS1149CN316R 1 Near Side. 20 Shim Gap
-- -- -- If and as required, maximum thickness .040 with BACS40R*TX or BACS40*R*. Fay surface seal both sides of shim using BMS 5-63. Ensure any gaps are filled with sealant after assembly. 21 Install Spacer 315A2107-5 (Left and Right Sides) 3
--

FIGURE 3. LEFT AND RIGHT UPPER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 4 OF 4 737-78-1063 Revision 2: October 7, 1999 23

### BOEING SERVICE BULLETIN 737-78-1063



### A SEE

FWDS54193

FIGURE 4. LEFT AND RIGHT UPPER/LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS MODIFICATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 1 OF 3 737-78-1063 Revision 2: October 7, 1999 24

### BOEING SERVICE BULLETIN 737-78-1063



## A 1

1

2

FWDS54425

FIGURE 4. LEFT AND RIGHT UPPER/LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS MODIFICATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 2 OF 3 737-78-1063 Revision 2: October 7, 1999 25

### BOEING SERVICE BULLETIN 737-78-1063

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for half of thrust reverser. STEP TASK NAME PART NUMBER QTY NOTES 1 Install Bracket Assembly 315A2134-134 10Install 2 rivets on each bracket. Fay surface seal with BMS 5-63. Ensure a small fillet seal is formed to contact squeeze out from fay surface seal. Refer to Drawing 302A2100, Sheet 1 for the bracket assembly locations. Rivet CSR904B5E5 20

2 Install Bracket Assembly 315A2134-134 2 Install 2 rivets on each bracket. Using BMS 5-63. Refer to Drawing 302A2100, Sheet 1 for the bracket assembly locations. Rivet BACR15CE5M3 4

FIGURE 4. LEFT AND RIGHT UPPER/LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS MODIFICATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 3 OF 3 737-78-1063 Revision 2: October 7, 1999 26

### BOEING SERVICE BULLETIN 737-78-1063



### B BA A

FWDS54523

FIGURE 5. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 1 OF 3 737-78-1063 Revision 2: October 7, 1999 27

### BOEING SERVICE BULLETIN 737-78-1063



### 5 4 6 3 2 1



## A-A

B-B FWD

FWD PANEL ASSEMBLY AFT COWLS54759

FIGURE 5. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 2 OF 3 737-78-1063 Revision 2: October 7, 1999 28

### BOEING SERVICE BULLETIN 737-78-1063

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for half of thrust reverser.

STEP TASK NAME PART NUMBER QTY NOTES 1 Remove / Discard Retainer - Fire Seal Support 315A2173-43 1
-- 2 Remove / Keep Retainer - Fire Seal Support 315A2173-41 1
-- 3 Remove / Discard Bracket Assembly 315A2134-7 1 Remove left and right sides.
4 Remove / Discard Bracket Assembly 315A2134-9 2 Remove left and right sides.
5 Remove / Discard Bracket Assembly 315A2134-41 1 Remove left and right sides.
6 Remove / Discard Bracket 315A2172-9 (Left Side) and 315A2172-36 (Right Side) 1 1 --

FIGURE 5. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS REMOVAL (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 3 OF 3 737-78-1063 Revision 2: October 7, 1999 29

### BOEING SERVICE BULLETIN 737-78-1063



### C C A
A

FWDS54534

FIGURE 6. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 1 OF 7 737-78-1063 Revision 2: October 7, 1999 30

### BOEING SERVICE BULLETIN 737-78-1063



## B-B 20 17 19 18

12 12 11



## A-A 6 3 2 7 7 5

84 1

9

A SEE

A SEE



## A B SEE 10

2

16 13 15 14 FWD

RETAINER INSTALLATION ALIGNMENT FILLET SEAL

RETAINER RETAINER 0.375 0.625

0.060 MISMATCH 0.375 0.625 B B

BONDED PANEL ASSEMBLY AFT COWL PANEL ASSEMBLYS54800

FIGURE 6. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 2 OF 7 737-78-1063 Revision 2: October 7, 1999 31

### BOEING SERVICE BULLETIN 737-78-1063



### 25 23 24 22 21



## C-C B

FWD 26 PLACES AB C B C C D D E E F E F F G G H H I H I I J J K JS54788

FIGURE 6. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 3 OF 7 737-78-1063 Revision 2: October 7, 1999 32

### BOEING SERVICE BULLETIN 737-78-1063

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for half of thrust reverser.

STEPTASK NAME PART NUMBER QTY NOTES 1 Install Bracket 315A2172-43 (Left Side) and 315A2172-44 (Right Side) 1 1 Fay surface seal with BMS 5-63. Ensure a small fillet seal is formed to contact squeeze out from fay surface seal. 2 Install Bracket Assembly 315A2172-39 (Left Side) and 315A2172-40 (Right Side) 1 1 Fay surface seal with BMS 5-63. Ensure a small fillet seal is formed to contact squeeze out from fay surface seal. 3 Install Rivet MS20615-5M 3 Drill from pilot holes in bracket 315A2172-43 to .1590 - .1670 inch diameter. 4 Install Retainer 315A2173-46 1 Fay surface seal with BMS 5-63. Ensure a small fillet seal is formed to contact squeeze out from fay surface seal. 5 Install Rivet MS20615-5M 2 Drill from pilot holes in bracket 315A2172-46 to .1590 - .1670 inch diameter. 6 Install / Kept Retainer 315A2173-41 1
-- 7 Install Rivet MS20615-5M 3
-- 8 Install Rivet MS20615-5M 3 Drill from pilot holes in bracket 315A2172-43 through bracket

assembly 315A2172-39 to .1590 - .1670 inch diameter. 9 Install Bolt Nut BACB30LK2U3 BACN10YT08CS 1 1 Drill from hole in support bracket fire seal 315A2172-11 to .1640 - .1680 inch diameter. 10 Install Rivet MS20615-5M 1
-- 11 Install Bolt Collar BACB30NY*K* KFN511DL3 4 4 Torque to 25 - 35 in-lb.
12 Install Rivet BACR15CE*M* 6 Install rivets and drill to .1280 - .1350 inch diameter through retainer 315A2173-41 and bracket 315A2172-43. 13 Install Rivet MS20615-5M 2 Drill from pilot hole in bracket assembly 315A2172-39. 14 Install Bracket 315A2172-55 (Left Side) and 315A2172-56 (Right Side) 1 1 --

FIGURE 6. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 4 OF 7 737-78-1063 Revision 2: October 7, 1999 33

### BOEING SERVICE BULLETIN 737-78-1063

(Continued) STEPTASK NAME PART NUMBER QTY NOTES

15 Install Bolt Collar BACB30NY*K* KFN511DL3 1 1 Drill from pilot hole in bracket 315A2172-55. 16 Fill Gap
-- -- -- Fill gap with BMS 5-63. Fillet seal to promote drainage, remove excess sealant. 17 Install Bracket Assembly 315A2134-125 (Left Side) and 315A2134-126 (Right Side) 1 1 Fay surface seal with BMS 5-63. Ensure a small fillet seal is formed to contact squeeze out from fay surface seal. 18 Install Pin Sleeve Lock Collar ASPPFV06-12AC ASPFSV06 ASPLC2AC06 1 1 1 Drill hole .2030 - .2080 inch diameter countersink far side. Spotface along the hole centerline .020 to .025 deep to ensure fastener head seats properly against bracket. Refer to Drawing 315T3558 for ASP fasteners installation. 19 Install Pin Sleeve Lock Collar ASPPFV06-15AC ASPFSV06 ASPLC2AC06 1 1 1 Drill hole .2030 - .2080 inch diameter countersink far side. Spotface along the hole centerline .020 to .025 deep to ensure fastener head seats properly against bracket. Refer to Drawing 315T3558 for ASP fasteners installation. 20 Install Pin Sleeve Lock Collar ASPPFV06-17AC ASPFSV06 ASPLC2AC06 1 1 1 Drill hole .2030 - .2080 inch diameter countersink far side. Spotface along the hole centerline .020 to .025 deep to ensure fastener head seats properly against bracket. Refer to Drawing 315T3558 for ASP fasteners installation. 21 Install Fasteners
-- 26See fastener code. 22 Install Bracket Assembly 315A2134-129 (Left Side) and 315A2134-130 (Right Side) 1 1 Fay surface seal with BMS 5-63. Ensure a small fillet seal is formed to contact squeeze out from fay surface seal. Drill hole .2030 - .2080 inch diameter countersink far side. Refer to Drawing 315T3558 for ASP fasteners installation. Pin Sleeve Lock Collar ASPPFV06-21AC ASPFSV06 ASPLC2AC06 4 4 4

FIGURE 6. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 5 OF 7 737-78-1063 Revision 2: October 7, 1999 34

### BOEING SERVICE BULLETIN 737-78-1063

(Continued) STEPTASK NAME PART NUMBER QTY NOTES

23 Install Bracket Assembly315A2134-133 2 Fay surface seal with BMS 5-63. Ensure a small fillet seal is formed to contact squeeze out from fay surface seal. Drill hole .2030 - .2080 inch diameter countersink far side. Refer to Drawing 315T3558 for ASP fasteners installation. Pin Sleeve Lock Collar ASPPFV06-21AC ASPFSV06 ASPLC2AC06 6 6 6
24 Install Spacer 315A2107-6 1
-- 25 Install Spacer 315A2107-4 1
--

FIGURE 6. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 6 OF 7 737-78-1063 Revision 2: October 7, 1999 35

### BOEING SERVICE BULLETIN 737-78-1063

The codes shown below agree with the letter shown in the upper left corner of the fastener symbols in the figure.

CODE NAME PART NUMBER HOLE DIA NOTES A Bolt Nut BACB30NW6K13 BACN10ZZ3D -- -- B Bolt Nut BACB30NW6K14 BACN10ZZ3D -- -- C Bolt Nut BACB30NW6K15 BACN10ZZ3D -- -- D Bolt Nut BACB30NW6K16 BACN10ZZ3D -- -- E Bolt Nut BACB30NW6K17 BACN10ZZ3D -- -- F Bolt Nut BACB30NW6K18 BACN10ZZ3D -- -- G Bolt Nut BACB30NW6K19 BACN10ZZ3D -- -- H Bolt Nut BACB30NW6K20 BACN10ZZ3D -- -- I Bolt Nut BACB30NW6K21 BACN10ZZ3D -- -- J Bolt Nut BACB30NW6K22 BACN10ZZ3D -- -- K Bolt Nut BACB30NW6K23 BACN10ZZ3D -- --

FIGURE 6. LEFT AND RIGHT LOWER THRUST REVERSER INSULATION BLANKET SUPPORT BRACKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 7 OF 7 737-78-1063 Revision 2: October 7, 1999 36

### BOEING SERVICE BULLETIN 737-78-1063



### 1 C D 

### 3

1 1

1 2 C

E

D D

C E E



### 1 C B A

B 

### 27 PLACES

FWDS52003

FIGURE 7. LEFT AND RIGHT THRUST REVERSER INSULATION BLANKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 1 OF 2 737-78-1063 Revision 2: October 7, 1999 37

### BOEING SERVICE BULLETIN 737-78-1063

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for half of thrust reverser.

STEP TASK NAME PART NUMBER QTY NOTES 1 Apply Adhesive (Silicone) RTV 106
-- Fillet seal the gap between the blanket cutout and the compression pad spacer. Refer to Boeing Standard Overhaul Practices Manual 20-50-12. 2 Install Insulation Blanket S315A213-43 (Left Side) and S315A213-44 (Right Side) 1 1 --

Fasteners
-- -- See fastener code. 3 Install Insulation Blanket S315A213-45 (Left Side) and S315A213-46 (Right Side) 1 1 --

Fasteners
-- -- See fastener code. The codes shown below agree with the letter shown in the upper left corner of the fastener symbols in the figure.

CODE NAME PART NUMBER HOLE DIA NOTES A Nut Washer 0090-13365 315W1163-54 -- -- B Nut Washer BACS12GU3K10 315W1163-26 -- -- C Nut Washer BACS12GU3K12 315W1163-26 -- -- D Nut Washer BACN10YR3C 315W1163-26 -- -- E Nut Washer BACS12GU3K16 315W1163-26 -- --

FIGURE 7. LEFT AND RIGHT THRUST REVERSER INSULATION BLANKETS INSTALLATION (LEFT SIDE SHOWN, RIGHT SIDE SIMILAR) September 24, 1998 SHEET 2 OF 2 737-78-1063 Revision 2: October 7, 1999 38

### Commercial Airplane Group 

# 737 Service Bulletin

Number: 737-78-1063 

## Evaluation Form Date: September 24, 1998 Revision 2: October 7, 1999 ATA System: 7831 Prepared By: Ryan Ly

SUBJECT:EXHAUST - Thrust Reverser - Inner Wall Blanket Insulation Change

Use this evaluation form to tell us what you think of the quality of this service bulletin. We will use the data that you give us to improve the quality of our service bulletins. NOTE: Please do not use this evaluation form to tell us to make changes to your manuals. To make these changes, please use a Publication Change Request (PCR) form. Please give us this data: (If necessary, please use the other side. Thank you for the time you used to give us your comments.) OPERATOR: TODAY'S DATE: PREPARED BY: TITLE: ORGANIZATION: TELEX CODE: TELEPHONE NUMBER: BASE: Please rate the quality of this service bulletin: (good)4321(poor) Please rate the quality of the illustrations: (good)4321(poor) Will you do the change given by this service bulletin? Yes No If not, please explain: Is this service bulletin easy to understand? Yes No If not, please explain: Is this service bulletin easy to use? Yes No If not, please explain: Are the Planning Information, Material Information, and Accomplishment Instructions accurate? Yes No If not, please explain: Is the Manpower estimate accurate? Yes No If not, please explain:
Give the completed evaluation form to your Boeing Field Service Representative or send the evaluation form directly to this address: Manager Service Bulletin Engineering Boeing Commercial Airplane Group P.O. Box 3707, Mail Stop 2H-37 Seattle, WA 98124-2207