### Commercial **Airplanes** 

# 747 Service Bulletin **ALERT Number: 747-52A2294**  Original Issue: July 08, 2010 Revision 2: December 12, 2011 ATA System: 5232 **SUBJECT:**DOORS - Side Cargo Doors - Main Deck Side Cargo Door Latch Pin and Latch Pin Retention Bolt Inspection and Modification Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.9E991 ECCN: 

## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work. This document includes proprietary information owned by The Boeing Company and/or one or more third parties. Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the Boeing livery are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: July 08, 2010 747-52A2294 Revision 2: December 12, 2011 1 of 4 3.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: July 08, 2010 747-52A2294 Revision 2: December 12, 2011 2 of 4 **BOEING SERVICE BULLETIN 747-52A2294 ALERT**  **ALERT**

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### Commercial **Airplanes** 

# 747 Service Bulletin **ALERT Short Form Revision**  **Number: 747-52A2294** Original Issue: July 08, 2010 Revision 2: December 12, 2011 ATA System: 5232 **SUBJECT:**DOORS - Side Cargo Doors - Main Deck Side Cargo Door Latch Pin and Latch Pin Retention Bolt Inspection and Modification Revision 2 is sent to change information. Only the changed information is described below. Revision 1 and Revision 2 are necessary to do the service bulletin. **COMPLIANCE INFORMATION RELATED TO THIS REVISION** No more work is necessary on airplanes changed in accordance with Revision 1 of this service bulletin. **REASON FOR REVISION** This revision is sent to include additional Compliance information for the latch fitting inspections described in Paragraph 1.E., Compliance, Table 1. This revision is also sent to change the specified Boeing Tool Kit Number from MIT140U8005-1 to MIT140U8005. **REVISION HISTORY** July 08, 2010 Original Issue: August 16, 2011 Revision 1: December 12, 2011 Revision 2:
**EFFECTIVITY** 747-100, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400F, and 747SR Airplanes. Refer to Paragraph 1.A.1., Airplanes, in Revision 1 for the list of affected airplanes.
**APPROVAL** This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other 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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: July 08, 2010 747-52A2294 Revision 2: December 12, 2011 3 of 4**EXISTING INFORMATION** The following is the existing information in the service bulletin: 1. In the last row of Table 1 in Paragraph 1.E., Compliance, the existing statement in the "Compliance Time" column is "Within 6 months of the previous inspection done in accordance with this service bulletin." 2. In the Rental Data table in Paragraph 2.E., Special Tooling - Price and Availability, the existing Tool Kit Number is "MIT140U8005-1". 3. In the table in Paragraph 2.F, Special Tooling Necessary to do this Service Bulletin, the existing Tool Kit Number is "MIT140U8005-1". 4. In the note in Paragraph 2.F, Special Tooling Necessary to do this Service Bulletin, the existing statement is "Reamer Kit MIT140U8005-14, which is a component of Tool Kit MIT140U8005-1, can be ordered if additional reamers are needed". 5. In Step 5 of Figure 10, Figure 11, Figure 12, Figure 13 and Figure 14, the existing statement in the first row of the "More Data" column is "Increase hole diameter to 0.3140 - 0.3180 inch. Refer to Boeing Tool Kit MIT140U8005-1 for an accepted procedure. (f)" 6. In Step 6 of Figure 15, the existing statement in the first row of the "More Data" column is "Increase hole diameter to 0.3140 - 0.3180 inch. Refer to Boeing Tool Kit MIT140U8005-1 for an accepted procedure. (g)" **CHANGED INFORMATION** For each numbered item in the CHANGED INFORMATION, refer to the same numbered item in the EXISTING INFORMATION. The following is the changed information in the service bulletin: 1. In the last row of Table 1 in Paragraph 1.E., Compliance, the changed statement in the "Compliance Time" column is "Within 6 months of the previous inspection done in accordance with this service bulletin, or within 6 months after the Revision 2 date of this service bulletin, whichever is later." 2. In the Rental Data table in Paragraph 2.E., Special Tooling - Price and Availability, the changed Tool Kit Number is "MIT140U8005". 3. In the table in Paragraph 2.F, Special Tooling Necessary to do this Service Bulletin, the changed Tool Kit Number is "MIT140U8005". 4. In the note in Paragraph 2.F, Special Tooling Necessary to do this Service Bulletin, the changed statement is "Reamer Kit MIT140U8005-14, which is a component of Tool Kit MIT140U8005, can be ordered if additional reamers are needed". 5. In Step 5 of Figure 10, Figure 11, Figure 12, Figure 13 and Figure 14, the changed statement in the first row of the "More Data" column is "Increase hole diameter to 0.3140 - 0.3180 inch. Refer to Boeing Tool Kit MIT140U8005 for an accepted procedure. (f)" 6. In Step 6 of Figure 15, the changed statement in the first row of the "More Data" column is "Increase hole diameter to 0.3140 - 0.3180 inch. Refer to Boeing Tool Kit MIT140U8005 for an accepted procedure. (g)"

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: July 08, 2010 747-52A2294 Revision 2: December 12, 2011 4 of 4 **BOEING SERVICE BULLETIN 747-52A2294 ALERT**  **ALERT**