AD 80-14-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 501-D13 | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13A | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13D | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13E | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13H | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
Unsafe Condition
Disc failures due to fatigue in the 1st stage turbine wheels with part numbers 6844061 and 6847111.
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Required Actions
Remove turbine wheels from service based on spline fit interference and cycle limits. Operators must obtain spline fit data from the overhauler and comply with removal schedules specified for their wheel's cycle count and spline fit category.
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Compliance Time
Within the specified cycle limits based on spline fit and cycle count as of the effective date (July 10, 1980).
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Affected Aircraft
Rolls-Royce Corporation Model 501-D13, 501-D13A, 501-D13D, 501-D13E, and 501-D13H engines equipped with 1st stage turbine wheels part numbers 6844061 and 6847111.
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Federal Register Abstract
1st Stage Turbine Wheels
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_80-14-13.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-14-13 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines Subject: 1st Stage Turbine Wheels Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/10/1980 Make: Rolls-Royce Corporation Model: 501-D13 | 501-D13A | 501-D13D | 501-D13E | 501-D13H Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 80-14-13 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3820 AD NUMBER: 80-14-13 SUBJECT HEADING: DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines ACTION: SUMMARY: DATES: Effective July 10, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-14-13 DETROIT DIESEL ALLISON: Amendment 39-3820. Applies to Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H engines equipped with 1st stage turbine wheels with part numbers 6844061 and 6847111. Compliance is required as indicated. To prevent disc failures due to fatigue, these discs are to be removed from service depending upon the spline fit interference or reaching the hourly limitation. The schedule for wheel removal is as follows: (1) Spline fit - 0.000 to 0.0009T (a) Wheels which have greater than 15,800 cycles on the effective date of this AD are to be removed from service within 200 cycles. (b) Wheels which have less than 15,800 cycles on the effective date of this AD are to be removed from service before they accrue 16,000 cycles. (2) Spline fit - .001T - .0025T (a) Wheels which have greater than 18,550 cycles on the effective date of this AD are to be removed from service within 450 cycles. (b) Wheels which have less than 18,550 cycles on the effective date of this AD are to be removed from service before they accrue 19,000 cycles. (3) It is the operator's responsibility to obtain wheel-to-shaft spline fit data from the Overhauler to determine which spline fit applies to their respective turbine or turbines. Only wheels that have conformed to a .001T min. fit throughout their entire utilization history qualify for paragraph (2) above. (4) Wheels which have 9700 hours of service prior to accuring 16,000 cycles (spline fit 0.000 to 0.0009T) or 19,000 cycles (spline fit .001T - .0025T) shall be removed from service. This amendment becomes effective July 10, 1980. FOOTER:
Document Text
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AD Final Rules - DRS_80-14-13.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-14-13 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines Subject: 1st Stage Turbine Wheels Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/10/1980 Make: Rolls-Royce Corporation Model: 501-D13 | 501-D13A | 501-D13D | 501-D13E | 501-D13H 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: 80-14-13 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3820 AD NUMBER: 80-14-13 SUBJECT HEADING: DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines ACTION: SUMMARY: DATES: Effective July 10, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-14-13 DETROIT DIESEL ALLISON: Amendment 39-3820. Applies to Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H engines equipped with 1st stage turbine wheels with part numbers 6844061 and 6847111. Compliance is required as indicated. To prevent disc failures due to fatigue, these discs are to be removed from service depending upon the spline fit interference or reaching the hourly limitation. The schedule for wheel removal is as follows: (1) Spline fit - 0.000 to 0.0009T (a) Wheels which have greater than 15,800 cycles on the effective date of this AD are to be removed from service within 200 cycles. (b) Wheels which have less than 15,800 cycles on the effective date of this AD are to be removed from service before they accrue 16,000 cycles. (2) Spline fit - .001T - .0025T (a) Wheels which have greater than 18,550 cycles on the effective date of this AD are to be removed from service within 450 cycles. (b) Wheels which have less than 18,550 cycles on the effective date of this AD are to be removed from service before they accrue 19,000 cycles. (3) It is the operator's responsibility to obtain wheel-to-shaft spline fit data from the Overhauler to determine which spline fit applies to their respective turbine or turbines. Only wheels that have conformed to a .001T min. fit throughout their entire utilization history qualify for paragraph (2) above. (4) Wheels which have 9700 hours of service prior to accuring 16,000 cycles (spline fit 0.000 to 0.0009T) or 19,000 cycles (spline fit .001T - .0025T) shall be removed from service. This amendment becomes effective July 10, 1980. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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