AD 70-25-06
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-10 | ROLLS-ROYCE DART Models Dart 542-4, 542-4K, 542-10, 542-10J, and 542-10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-10J | ROLLS-ROYCE DART Models Dart 542-4, 542-4K, 542-10, 542-10J, and 542-10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-10K | ROLLS-ROYCE DART Models Dart 542-4, 542-4K, 542-10, 542-10J, and 542-10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-4 | ROLLS-ROYCE DART Models Dart 542-4, 542-4K, 542-10, 542-10J, and 542-10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-4K | ROLLS-ROYCE DART Models Dart 542-4, 542-4K, 542-10, 542-10J, and 542-10K Engines |
Unsafe Condition
Engine Propeller Shaft
Federal Register Abstract
Engine Propeller Shaft
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-25-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-25-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: ROLLS-ROYCE DART Models Dart 542-4, 542-4K, 542-10, 542-10J, and 542-10K Engines Subject: Engine Propeller Shaft Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/07/1970 Make: Rolls-Royce Deutschland Ltd & Co KG Model: Dart 542-10 | Dart 542-10J | Dart 542-10K | Dart 542-4 | Dart 542-4K Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-25-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1119 AD NUMBER: 70-25-06 SUBJECT HEADING: ROLLS-ROYCE DART Models Dart 542-4, 542-4K, 542-10, 542-10J, and 542-10K Engines ACTION: SUMMARY: DATES: Effective December 7, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-25-06 ROLLS-ROYCE DART: Amdt. 39-1119. Applies to Rolls-Royce Dart Models 542-4, 542-4K, 542-10, 542-10J, and 542-10K engines. Compliance is required as indicated, unless already accomplished. To prevent cracking and subsequent failure of the engine propeller shaft and damage to the coarse pitch oil line due to material inclusions in that part of the shaft between the annulus gear support diaphragms, accomplish the following: (a) For all airplanes with Rolls-Royce Dart Models 542-4, 542-4K, 542-10, 542-10J, and 542-10K engines installed except those having engine propeller shafts installed which have been supplied by Rolls-Royce with "CU" marked on the front end of the shaft, or in which each engine propeller shaft has been overhauled (including ultrasonic inspection for cracks and material inclusions) in accordance with Rolls-Royce Dart Overhaul Manual O-DA.10-AC and identified with "CU" marked on the front end of the shaft, and which are not listed in paragraph (g) of this AD, within the Next 50 hours' time in service after the effective date of this AD, install the following placard in clear view of the pilot and as close to the R.P.M. indicators as practicable: "In the event of abnormal, short duration R.P.M. increase (500-600 R.P.M.) accompanied by a drop in TGT and torque pressure at a fixed power setting, immediately feather affected propeller per AFM feathering instructions." (b) For engines which have been feathered in accordance with the placard in paragraph (a), overhaul the engine propeller shaft (including ultrasonic inspection) in accordance with Rolls-Royce Dart Overhaul Manual O- DA.10AC to determine whether material inclusions or cracks exist in that part of the engine propeller shaft between the annulus gear support diaphragms, and whether the propeller coarse pitch oil line has been damaged. If material inclusions or cracks in the propeller shaft or damage to the propeller coarse pitch oil line are found, before further flight replace the cracked propeller shaft and damaged propeller coarse pitch oil line with an approved serviceable part of the same part number. (c) For all engines having propeller shafts with 1200 or more hours' time in service on the effective date of this AD, within the next 450 hours' time in service and thereafter at intervals not to exceed 1200 hours' time in service since the last inspection, inspect each engine propeller shaft (including ultrasonic inspection) in accordance with Rolls-Royce Dart Aero Engine Alert Service Bulletin Number Da 72-367, dated September 17, 1969, or later ARB-approved issue or an FAA-approved equivalent. If material inclusions or cracks are detected during any inspection, before further flight replace the engine propeller shaft with an approved serviceable part of the same part number. (d) For all engines having propeller shafts with less than 1200 hours' time in service on the effective date of this AD, within a total of 1650 hours' time in service, and thereafter at intervals not to exceed 1200 hours' time in service since the last inspection, inspect each engine propeller shaft (including ultrasonic inspection) in accordance with Rolls-Royce Dart Aero Engine Alert Service Bulletin Number Da 72-367, dated September 17, 1969, or later ARB-approved issue or an FAA-approved equivalent. If material inclusions or cracks are detected during any inspection, before further flight replace the engine propeller shaft with an approved serviceable part of the same part number. (e) For Rolls-Royce Dart Models 542-4 and 542-4K engines installed in Convair airplanes, the repetitive inspections required by paragraphs (c) and (d) may be discontinued when propeller shafts are installed which have been supplied by Rolls-Royce with "CU" marked on the front end of the shaft, or which have been overhauled (including ultrasonic inspection for cracks and material inclusions) in accordance with Rolls-Royce Dart Overhaul Manual O-DA.10-AC and identified with "CU" marked on the front end of the shaft. (f) For all engines with propeller shafts installed bearing the serial numbers listed in paragraph (g), the placard required by paragraph (a) may not be removed until an FAA-approved inspection method has been developed to insure that the shafts are free from defects. (g) For Rolls-Royce Dart Models 542-4 and 542-4K engine with propeller shafts installed bearing the serial numbers listed below and which are not installed in Convair airplanes and for all Rolls-Royce Models 542- 10, 542-10J and 542-10K engines with propeller shafts installed bearing the serial numbers listed below, the repetitive inspection required by paragraphs (c) and (d) may not be discontinued until an FAA-approved inspection method has been developed to insure that the shafts are free from defects: INSPECTION OF DART PROPELLER SHAFTS IN INSTALLED ENGINES - SHAFTS FROM TOP THREE INGOT POSITION Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. HA.275 HD. 86 HE.111 HJ.135 HM.267 HR.536 HS. 8 HA.277 HD. 88 HE.115 HJ.138 HM.272 HR.547 HS. 11 HA.281 HD. 94 HE.121 HJ.143 HM.288 HR.551 HS. 13 HD. 95 HE.129 HJ.151 HM.289 HR.552 HS. 14 HB. 25 HD. 97 HE.135 HJ.153 HM.294 HR.553 HS. 16 HB. 29 HD.103 HE.139 HJ.157 HM.436 HR.580 HS. 24 HB. 30 HD.105 HE.141 HJ.165 HR.581 HS. 25 HD.107 HE.142 HJ.167 HR.315 HR.583 HS. 28 HC.846 HD.110 HE.143 HJ.168 HR.319 HR.592 HS. 29 HC.847 HD.117 HJ.173 HR.326 HR.595 HS. 30 HC.849 HD.119 HG.562 HJ.176 HR.337 HR.596 HS.129 HC.854 HD.373 HG.563 HJ.178 HR.345 HR.597 HS.131 HC.856 HD.376 HG.570 HJ.180 HR.346 HR.600 HS.139 HC.857 HD.377 HG.571 HJ.189 HR.439 HR.601 HS.140 HC.858 HD.391 HG.572 HJ.190 HR.442 HR.780 HS.142 HC.861 HD.392 HJ.196 HR.447 HR.781 HS.149 HC.862 HD.394 HH.699 HJ.197 HR.448 HR.789 HS.150 HD.399 HH.700 HJ.199 HR.511 HR.980 HS.153 HD. 60 HD.401 HH.714 HJ.201 HR.513 HR.981 HS.156 HD. 61 HD.404 HH.715 HJ.207 HR.520 HR.989 HD. 62 HD.413 HH.716 HJ.212 HR.527 HR.993 HD. 67 HD.414 HH.717 HJ.218 HR.528 HR.995 HD. 69 HD.421 HH.719 HJ.219 HR.529 HD. 71 HD.425 HH.720 HJ.223 HR.532 HS. 1 HD. 73 HD.427 HH.721 HR.533 HS. 5 HD. 74 HM.266 HR.535 HS. 7 INSPECTION OF DART PROPELLER SHAFTS IN INSTALLED ENGINES - SHAFTS FROM UNRECORDED INGOT POSITIONS Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. HA. 28 HA.961 HC.577 HD.840 HH.670 HJ.957 HM.398 HA. 29 HA.962 HC.578 HD.841 HH.671 HJ.958 HM.399 HA. 30 HA.963 HC.579 HD.842 HH.672 HM.400 HA. 31 HA.964 HC.580 HD.843 HH.673 HM.355 HM.401 HA. 32 HC.581 HD.844 HH.674 HM.356 HM.402 HA. 37 HB. 35 HC.582 HD.845 HH.675 HM.357 HM.403 HA. 70 HB. 36 HC.850 HD.846 HH.676 HM.358 HM.404 HA. 71 HB. 37 HC.852 HD.847 HH.677 HM.359 HM.405 HA. 72 HB. 38 HC.853 HD.848 HH.678 HM.360 HM.406 HA. 73 HB. 39 HC.855 HD.849 HH.679 HM.361 HM.407 HA. 74 HB. 40 HC.859 HD.850 HH.680 HM.362 HM.408 HA. 75 HB. 41 HC.996 HD.851 HH.681 HM.363 HM.409 HA. 76 HB.975 HD.852 HH.682 HM.364 HM.410 HA. 77 HB.976 HD.807 HH.683 HM.365 HM.411 HA. 78 HB.977 HD.808 HH.638 HH.684 HM.366 HM.412 HA. 79 HB.978 HD.809 HH.639 HH.685 HM.367 HM.413 HA. 80 HB.979 HD.810 HH.640 HH.686 HM.368 HM.414 HA. 81 HB.980 HD.811 HH.641 HH.687 HM.369 HM.415 HA. 82 HB.981 HD.812 HH.642 HH.688 HM.370 HM.416 HA. 83 HB.982 HD.813 HH.643 HH.689 HM.371 HM.417 HA. 84 HD.814 HH.644 HH.690 HM.372 HM.418 HA. 85 HC.539 HD.815 HH.645 HH.691 HM.373 HM.419 HA. 86 HC.540 HD.816 HH.646 HH.692 HM.374 HM.420 HA. 87 HC.541 HD.817 HH.647 HH.693 HM.375 HM.421 HA. 88 HC.542 HD.818 HH.648 HH.694 HM.376 HM.422 HA. 89 HC.543 HD.819 HH.649 HH.798 HM.377 HM.423 HA. 90 HC.544 HD.820 HH.650 HH.799 HM.378 HM.424 HA. 91 HC.545 HD.821 HH.651 HH.800 HM.379 HM.425 HA. 92 HC.546 HD.822 HH.652 HH.801 HM.380 HM.426 HA. 93 HC.547 HD.823 HH.653 HH.802 HM.381 HM.427 HA. 94 HC.548 HD.824 HH.654 HH.803 HM.382 HM.428 HA. 95 HC.549 HD.825 HH.655 HH.804 HM.383 HM.429 HA. 96 HC.550 HD.826 HH.656 HM.384 HM.430 HA. 97 HC.558 HD.827 HH.657 HJ.944 HM.385 HM.431 HA.592 HC.559 HD.828 HH.658 HJ.945 HM.386 HM.432 HA.595 HC.560 HD.829 HH.659 HJ.946 HM.387 HM.433 HA.690 HC.561 HD.830 HH.660 HJ.947 HM.388 HM.434 HA.952 HC.562 HD.831 HH.661 HJ.948 HM.389 HM.435 HA.953 HC.563 HD.832 HH.662 HJ.949 HM.390 HA.954 HC.564 HD.833 HH.663 HJ.950 HM.391 HR.355 HA.955 HC.565 HD.834 HH.664 HJ.951 HM.392 HA.956 HC.566 HD.835 HH.665 HJ.952 HM.393 HA.957 HC.567 HD.836 HH.666 HJ.953 HM.394 HA.958 HC.568 HD.837 HH.667 HJ.954 HM.395 HA.959 HC.569 HD.838 HH.668 HJ.955 HM.396 HA.960 HC.576 HD.839 HH.669 HJ.956 HM.397 These numbers are listed in Appendices A and B of Rolls-Royce Dart Aero Engine Service Bulletin No. Da 72-367, Revision 2, dated February 18, 1970. This supersedes Amendment 39-913, 35 F.R. 145, AD 70-2-3 as amended by Amendment 39-1056, 35 F.R. 12270. This amendment becomes effective December 7, 1970. FOOTER:
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AD Final Rules - DRS_70-25-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-25-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: ROLLS-ROYCE DART Models Dart 542-4, 542-4K, 542-10, 542-10J, and 542-10K Engines Subject: Engine Propeller Shaft Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/07/1970 Make: Rolls-Royce Deutschland Ltd & Co KG Model: Dart 542-10 | Dart 542-10J | Dart 542-10K | Dart 542-4 | Dart 542-4K Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-25-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1119 AD NUMBER: 70-25-06 SUBJECT HEADING: ROLLS-ROYCE DART Models Dart 542-4, 542-4K, 542-10, 542-10J, and 542-10K Engines ACTION: SUMMARY: DATES: Effective December 7, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-25-06 ROLLS-ROYCE DART: Amdt. 39-1119. Applies to Rolls-Royce Dart Models 542-4, 542-4K, 542-10, 542-10J, and 542-10K engines. Compliance is required as indicated, unless already accomplished. To prevent cracking and subsequent failure of the engine propeller shaft and damage to the coarse pitch oil line due to material inclusions in that part of the shaft between the annulus gear support diaphragms, accomplish the following: (a) For all airplanes with Rolls-Royce Dart Models 542-4, 542-4K, 542-10, 542-10J, and 542-10K engines installed except those having engine propeller shafts installed which have been supplied by Rolls-Royce with "CU" marked on the front end of the shaft, or in which each engine propeller shaft has been overhauled (including ultrasonic inspection for cracks and material inclusions) in accordance with Rolls-Royce Dart Overhaul Manual O-DA.10-AC and identified with "CU" marked on the front end of the shaft, and which are not listed in paragraph (g) of this AD, within the Next 50 hours' time in service after the effective date of this AD, install the following placard in clear view of the pilot and as close to the R.P.M. indicators as practicable: "In the event of abnormal, short duration R.P.M. increase (500-600 R.P.M.) accompanied by a drop in TGT and torque pressure at a fixed power setting, immediately feather affected propeller per AFM feathering instructions." (b) For engines which have been feathered in accordance with the placard in paragraph (a), overhaul the engine propeller shaft (including ultrasonic inspection) in accordance with Rolls-Royce Dart Overhaul Manual O- DA.10AC to determine whether material inclusions or cracks exist in that part of the engine propeller shaft between the annulus gear support diaphragms, and whether the propeller coarse pitch oil line has been damaged. If material inclusions or cracks in the propeller shaft or damage to the propeller coarse pitch oil line are found, before further flight replace the cracked propeller shaft and damaged propeller coarse pitch oil line with an approved serviceable part of the same part number. (c) For all engines having propeller shafts with 1200 or more hours' time in service on the effective date of this AD, within the next 450 hours' time in service and thereafter at intervals not to exceed 1200 hours' time in service since the last inspection, inspect each engine propeller shaft (including ultrasonic inspection) in accordance with Rolls-Royce Dart Aero Engine Alert Service Bulletin Number Da 72-367, dated September 17, 1969, or later ARB-approved issue or an FAA-approved equivalent. If material inclusions or cracks are detected during any inspection, before further flight replace the engine propeller shaft with an approved serviceable part of the same part number. (d) For all engines having propeller shafts with less than 1200 hours' time in service on the effective date of this AD, within a total of 1650 hours' time in service, and thereafter at intervals not to exceed 1200 hours' time in service since the last inspection, inspect each engine propeller shaft (including ultrasonic inspection) in accordance with Rolls-Royce Dart Aero Engine Alert Service Bulletin Number Da 72-367, dated September 17, 1969, or later ARB-approved issue or an FAA-approved equivalent. If material inclusions or cracks are detected during any inspection, before further flight replace the engine propeller shaft with an approved serviceable part of the same part number. (e) For Rolls-Royce Dart Models 542-4 and 542-4K engines installed in Convair airplanes, the repetitive inspections required by paragraphs (c) and (d) may be discontinued when propeller shafts are installed which have been supplied by Rolls-Royce with "CU" marked on the front end of the shaft, or which have been overhauled (including ultrasonic inspection for cracks and material inclusions) in accordance with Rolls-Royce Dart Overhaul Manual O-DA.10-AC and identified with "CU" marked on the front end of the shaft. (f) For all engines with propeller shafts installed bearing the serial numbers listed in paragraph (g), the placard required by paragraph (a) may not be removed until an FAA-approved inspection method has been developed to insure that the shafts are free from defects. (g) For Rolls-Royce Dart Models 542-4 and 542-4K engine with propeller shafts installed bearing the serial numbers listed below and which are not installed in Convair airplanes and for all Rolls-Royce Models 542- 10, 542-10J and 542-10K engines with propeller shafts installed bearing the serial numbers listed below, the repetitive inspection required by paragraphs (c) and (d) may not be discontinued until an FAA-approved inspection method has been developed to insure that the shafts are free from defects: INSPECTION OF DART PROPELLER SHAFTS IN INSTALLED ENGINES - SHAFTS FROM TOP THREE INGOT POSITION Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. HA.275 HD. 86 HE.111 HJ.135 HM.267 HR.536 HS. 8 HA.277 HD. 88 HE.115 HJ.138 HM.272 HR.547 HS. 11 HA.281 HD. 94 HE.121 HJ.143 HM.288 HR.551 HS. 13 HD. 95 HE.129 HJ.151 HM.289 HR.552 HS. 14 HB. 25 HD. 97 HE.135 HJ.153 HM.294 HR.553 HS. 16 HB. 29 HD.103 HE.139 HJ.157 HM.436 HR.580 HS. 24 HB. 30 HD.105 HE.141 HJ.165 HR.581 HS. 25 HD.107 HE.142 HJ.167 HR.315 HR.583 HS. 28 HC.846 HD.110 HE.143 HJ.168 HR.319 HR.592 HS. 29 HC.847 HD.117 HJ.173 HR.326 HR.595 HS. 30 HC.849 HD.119 HG.562 HJ.176 HR.337 HR.596 HS.129 HC.854 HD.373 HG.563 HJ.178 HR.345 HR.597 HS.131 HC.856 HD.376 HG.570 HJ.180 HR.346 HR.600 HS.139 HC.857 HD.377 HG.571 HJ.189 HR.439 HR.601 HS.140 HC.858 HD.391 HG.572 HJ.190 HR.442 HR.780 HS.142 HC.861 HD.392 HJ.196 HR.447 HR.781 HS.149 HC.862 HD.394 HH.699 HJ.197 HR.448 HR.789 HS.150 HD.399 HH.700 HJ.199 HR.511 HR.980 HS.153 HD. 60 HD.401 HH.714 HJ.201 HR.513 HR.981 HS.156 HD. 61 HD.404 HH.715 HJ.207 HR.520 HR.989 HD. 62 HD.413 HH.716 HJ.212 HR.527 HR.993 HD. 67 HD.414 HH.717 HJ.218 HR.528 HR.995 HD. 69 HD.421 HH.719 HJ.219 HR.529 HD. 71 HD.425 HH.720 HJ.223 HR.532 HS. 1 HD. 73 HD.427 HH.721 HR.533 HS. 5 HD. 74 HM.266 HR.535 HS. 7 INSPECTION OF DART PROPELLER SHAFTS IN INSTALLED ENGINES - SHAFTS FROM UNRECORDED INGOT POSITIONS Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. Shaft Serial No. HA. 28 HA.961 HC.577 HD.840 HH.670 HJ.957 HM.398 HA. 29 HA.962 HC.578 HD.841 HH.671 HJ.958 HM.399 HA. 30 HA.963 HC.579 HD.842 HH.672 HM.400 HA. 31 HA.964 HC.580 HD.843 HH.673 HM.355 HM.401 HA. 32 HC.581 HD.844 HH.674 HM.356 HM.402 HA. 37 HB. 35 HC.582 HD.845 HH.675 HM.357 HM.403 HA. 70 HB. 36 HC.850 HD.846 HH.676 HM.358 HM.404 HA. 71 HB. 37 HC.852 HD.847 HH.677 HM.359 HM.405 HA. 72 HB. 38 HC.853 HD.848 HH.678 HM.360 HM.406 HA. 73 HB. 39 HC.855 HD.849 HH.679 HM.361 HM.407 HA. 74 HB. 40 HC.859 HD.850 HH.680 HM.362 HM.408 HA. 75 HB. 41 HC.996 HD.851 HH.681 HM.363 HM.409 HA. 76 HB.975 HD.852 HH.682 HM.364 HM.410 HA. 77 HB.976 HD.807 HH.683 HM.365 HM.411 HA. 78 HB.977 HD.808 HH.638 HH.684 HM.366 HM.412 HA. 79 HB.978 HD.809 HH.639 HH.685 HM.367 HM.413 HA. 80 HB.979 HD.810 HH.640 HH.686 HM.368 HM.414 HA. 81 HB.980 HD.811 HH.641 HH.687 HM.369 HM.415 HA. 82 HB.981 HD.812 HH.642 HH.688 HM.370 HM.416 HA. 83 HB.982 HD.813 HH.643 HH.689 HM.371 HM.417 HA. 84 HD.814 HH.644 HH.690 HM.372 HM.418 HA. 85 HC.539 HD.815 HH.645 HH.691 HM.373 HM.419 HA. 86 HC.540 HD.816 HH.646 HH.692 HM.374 HM.420 HA. 87 HC.541 HD.817 HH.647 HH.693 HM.375 HM.421 HA. 88 HC.542 HD.818 HH.648 HH.694 HM.376 HM.422 HA. 89 HC.543 HD.819 HH.649 HH.798 HM.377 HM.423 HA. 90 HC.544 HD.820 HH.650 HH.799 HM.378 HM.424 HA. 91 HC.545 HD.821 HH.651 HH.800 HM.379 HM.425 HA. 92 HC.546 HD.822 HH.652 HH.801 HM.380 HM.426 HA. 93 HC.547 HD.823 HH.653 HH.802 HM.381 HM.427 HA. 94 HC.548 HD.824 HH.654 HH.803 HM.382 HM.428 HA. 95 HC.549 HD.825 HH.655 HH.804 HM.383 HM.429 HA. 96 HC.550 HD.826 HH.656 HM.384 HM.430 HA. 97 HC.558 HD.827 HH.657 HJ.944 HM.385 HM.431 HA.592 HC.559 HD.828 HH.658 HJ.945 HM.386 HM.432 HA.595 HC.560 HD.829 HH.659 HJ.946 HM.387 HM.433 HA.690 HC.561 HD.830 HH.660 HJ.947 HM.388 HM.434 HA.952 HC.562 HD.831 HH.661 HJ.948 HM.389 HM.435 HA.953 HC.563 HD.832 HH.662 HJ.949 HM.390 HA.954 HC.564 HD.833 HH.663 HJ.950 HM.391 HR.355 HA.955 HC.565 HD.834 HH.664 HJ.951 HM.392 HA.956 HC.566 HD.835 HH.665 HJ.952 HM.393 HA.957 HC.567 HD.836 HH.666 HJ.953 HM.394 HA.958 HC.568 HD.837 HH.667 HJ.954 HM.395 HA.959 HC.569 HD.838 HH.668 HJ.955 HM.396 HA.960 HC.576 HD.839 HH.669 HJ.956 HM.397 These numbers are listed in Appendices A and B of Rolls-Royce Dart Aero Engine Service Bulletin No. Da 72-367, Revision 2, dated February 18, 1970. This supersedes Amendment 39-913, 35 F.R. 145, AD 70-2-3 as amended by Amendment 39-1056, 35 F.R. 12270. This amendment becomes effective December 7, 1970. FOOTER:
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