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

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BOEING SERVICE BULLETIN 747-52A2294

ALERT ALERT

BLANK PAGE
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

Original Issue: July 08, 2010

Revision 1: August 16, 2011

Revision 2: December 12, 2011

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.

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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)"

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BOEING SERVICE BULLETIN 747-52A2294

ALERT ALERT