(2)
Unless specified differently, all the fits are measured by its diameter.
(3)
The numbers in all columns are in inches, and (millimeters).
(4)
The letter "T" which follows the limits tells you it is a tight fit.
(5)
The Description column gives you the name for the part or parts.
B.
Inspection Frequency Requirements (IFR)
S 916-006-N00
(1) The IFR column gives you the Inspection Frequency Requirements. The Letter Codes A, B, or C found in the IFR column show how and when it is recommended to examine the item identified by the adjacent reference number, as applicable to regular repairs. These IFR codes are in the table that follows:
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
73-00-00
ALL ú ú N01 Page 601 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
~.............................................................................. | IFR | | | Code | Definition | ................................................................................
| A | The clearance or fit is calculated from the |
| | dimension of the part at each assembly of the parts. |
| | These dimensions written at the time of each part |
| | inspection are equally as correct as the dimensions |
| | written at the time of the part installation. |
| | |
| B | You must make an analysis of the clearance or fit at |
| | each installation of the parts. Use the trial |
| | assembly or the equivalent procedure to make an |
| | estimate of the clearance or fit. The dimension of |
| | the clearance or fit you calculated is only |
| | necessary if: |
| | |
| | The procedure you used to make an estimate |
| | shows that the clearance or fit is not in |
| | the specified limits, or |
| | |
| | One or two of the mating parts included |
| | is replaced or repaired in an area or in |
| | a procedure which changes the clearance |
| | or fit. |
| | |
| C | The fit is not made to change in the normal engine |
| | operation. The dimensions of the parts and the |
| | quantity you calculated of the fit is necessary if |
| | one of the mating parts inlcuded is replaced or |
| | repaired in the area or a procedure which would |
| | change the fit. |
2.....................…........................................................1
C. New Part Reference Dimensions S 916-002-N00
(1)
The dimensions are given in this column to refer to only. S 916-003-N00
(2)
The dimensions are the initial Minimum and Maximum values in inches (and millimeters) for each part found in the description column.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
73-00-00
ALL ú ú N01 Page 602 ú Feb 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
D. Limits
S 916-004-N00
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