AD 72-03-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 250-B15A | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-B15E | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-B15G | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-B17 | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C10B (T63-A-5A) | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C10D (T63-A-700) | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C18 | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C18A | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C18B | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C18C | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C19 | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C20 | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
Unsafe Condition
Second stage turbine wheels (P/Ns 6857912 and 6871872) may exceed their life limit margin due to excessive time in service, leading to potential failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service turbine wheels with over 1,500 hours' time in service within 50 hours after the AD's effective date. For wheels with 1,500 hours or less, remove before exceeding 1,550 hours' time in service. Actions must be accomplished unless already done.
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Compliance Time
Within the next 50 hours' time in service after the effective date of this AD, and prior to exceeding specified time in service limits.
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Affected Aircraft
Rolls-Royce Corporation engines: Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19, and 250-C20 with second stage turbine wheels P/Ns 6857912 and 6871872.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Turbine Wheels
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_72-03-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-03-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18...Show more Subject: Turbine Wheels Status: Current Citation: This information is not available. Citation Publish Date: 02/04/1972 Effective Date: 02/08/1972 Make: Rolls-Royce Corporation Model: 250-B15A | 250-B15E | 250-B15G | 250-B17 | 250-C10B (T63-A-5A) | 250-C10D (T63-A-700) | 250-C18 | 25...Show more Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 72-03-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1390 AD NUMBER: 72-03-06 SUBJECT HEADING: ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines ACTION: SUMMARY: DATES: Effective February 8, 1972. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-03-06 ALLISON: Amdt. 39-1390. Applies to Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 engines. Compliance: Required as indicated, unless already accomplished. To ensure adequate life limit margin for Allison P/Ns 6857912 and 6871872 second stage turbine wheels, accomplish the following: A) Within the next 50 hours' time in service after the effective date of this AD, remove from service all P/Ns 6857912 and 6871872 second stage turbine wheels having, over 1,500 hours' time in service. B) Prior to their exceeding 1550 hours' time in service, remove from service all P/Ns 6857912 and 6871872 second stage turbine wheels having 1500 hours or less time in service on the effective date of this AD. Allison Commercial Service Letter No. 250CSL-10, dated December 9, 1971, pertains to this subject. This amendment becomes effective February 8, 1972. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_72-03-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-03-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18...Show more Subject: Turbine Wheels Status: Current Citation: This information is not available. Citation Publish Date: 02/04/1972 Effective Date: 02/08/1972 Make: Rolls-Royce Corporation Model: 250-B15A | 250-B15E | 250-B15G | 250-B17 | 250-C10B (T63-A-5A) | 250-C10D (T63-A-700) | 250-C18 | 25...Show more Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 72-03-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1390 AD NUMBER: 72-03-06 SUBJECT HEADING: ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines ACTION: SUMMARY: DATES: Effective February 8, 1972. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-03-06 ALLISON: Amdt. 39-1390. Applies to Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 engines. Compliance: Required as indicated, unless already accomplished. To ensure adequate life limit margin for Allison P/Ns 6857912 and 6871872 second stage turbine wheels, accomplish the following: A) Within the next 50 hours' time in service after the effective date of this AD, remove from service all P/Ns 6857912 and 6871872 second stage turbine wheels having, over 1,500 hours' time in service. B) Prior to their exceeding 1550 hours' time in service, remove from service all P/Ns 6857912 and 6871872 second stage turbine wheels having 1500 hours or less time in service on the effective date of this AD. Allison Commercial Service Letter No. 250CSL-10, dated December 9, 1971, pertains to this subject. This amendment becomes effective February 8, 1972. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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