AD 92-01-08
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Canada Corp. | PW118 | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW118A | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW120 | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW120A | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW121 | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW123 | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW124B | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW125B | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
Unsafe Condition
Seizure of the high pressure rotor and subsequent inability to restart the engine inflight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Rework or replace the high pressure turbine front cover, low pressure turbine stator vane assembly, high pressure vane segments, and cooling air nozzle housing assembly in accordance with specified Pratt & Whitney Canada service bulletins. Alternative methods of compliance may be approved by the Engine Certification Office.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next engine module overhaul, hot section inspection (HSI), or within 36 months from the effective date of this AD, whichever occurs first, unless accomplished previously.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Canada PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B engines with specific serial numbers noted in applicable service bulletins, installed in various aircraft models including Aerospatiale ATR-42, ATR-72, British Aerospace ATP, DeHavilland DHC-8, Embraer EMB-120, Canadair CL-215T, and Fokker 50.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
High Pressure Rotor
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_92-01-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-01-08 Document Type: AD Final Rules Docket Number: 90-ANE-29 Subject Heading: PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines Subject: High Pressure Rotor Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/27/1992 Make: Pratt & Whitney Canada Corp. Model: PW118 | PW118A | PW120 | PW120A | PW121 | PW123 | PW124B | PW125B 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: 92-01-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-ANE-29 AMENDMENT: 39-8132 AD NUMBER: 92-01-08 SUBJECT HEADING: PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines ACTION: SUMMARY: DATES: Effective July 27, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-01-08 PRATT & WHITNEY CANADA: Amendment 39-8132. Docket No. 90-ANE-29. Applicability: Pratt & Whitney Canada (PWC) PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B model turboprop engines, with specific engine serial numbers noted in the applicable service bulletins (SB). Affected engines are installed in, but not limited to, the Aerospatiale ATR-42, and ATR-72, British Aerospace ATP, DeHavilland of Canada DHC-8, Embraer EMB-120, Canadair CL-215T, and Fokker 50 aircraft. Compliance: Required at the next engine module overhaul, hot section inspection (HSI), or within 36 months from the effective date of this airworthiness directive (AD), whichever occurs first, unless accomplished previously. To prevent seizure of the high pressure rotor, and subsequent inability to restart the engine inflight, accomplish the following: (a) Rework or replace with a serviceable part, the high pressure turbine front cover in accordance with the requirements of any of the following PWC SBs, as applicable: SB 20417, Revision 2, dated August 20, 1990, SB 20412, dated November 27, 1989; SB 20604, Revision 1, dated February 25, 1991; or SB 20979, dated April 29, 1991. (b) Rework the low pressure turbine stator vane assembly in accordance with the requirements of PWC SB 20456, Revision 3, dated August 20, 1990. (c) For engines incorporating the "triple segmented" high pressure vane ring segment assembly, Part Number (P/N) 3037761, rework or replace the high pressure vane segments as follows: (1) For PW115, PW118, PW120, PW120A, and PW121 model turboprop engines, rework or replace with a serviceable part in accordance with the requirements of either of the following PWC SBs, as applicable: SB 20419, Revision 3, dated November 26, 1990; or SB 20886, Revision 2, dated February 11, 1991. (2) For PW118A, PW123, PW124B, and PW125B model turboprop engines, rework or replace with a serviceable part in accordance with the requirements of any of the following PWC SBs, as applicable: SB 20419, Revision 3, dated November 26, 1990; SB 20726, dated February 19, 1990; SB 20742, Revision 4, dated June 12, 1991; SB 20886, Revision 2, dated February 11, 1991; or SB 20869, Revision 1, dated April 26, 1991. (d) For engines incorporating the "triple segmented" high pressure vane ring segment assembly, P/N 3037761, rework or replace with a serviceable part, the cooling air nozzle housing assembly as follows: (1) For PW115, PW118, PW120, PW120A, and PW121 model turboprop engines, rework or replace with a serviceable part in accordance with the requirements of any of the following PWC SB's, as applicable: SB 20341, Revision 2, dated September 3, 1991, SB 20436, dated March 6, 1989, or SB 20873, Revision 3, dated April 8, 1991. (2) For PW118A, PW123, PW124B, and PW125B model turboprop engines, rework or replace with a serviceable part in accordance with the requirements of any of the following PWC SB's, as applicable: SB 20341, Revision 2, dated September 3, 1991, SB 20436, dated March 6, 1989, SB 20873, Revision 3, dated April 8, 1991, SB 20896, Revision 3, dated August 26, 1991, or SB 20872, Revision 2, dated July 8, 1991. (e) An alternative method of compliance or adjustment of the compliance time, that provides an acceptable level of safety may be used if approved by the Manager, Engine Certification Office, Engine and Propeller Directorate. The request should be forwarded through an FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Engine Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Engine Certification Office. (f) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (g) The engine modifications shall be done in accordance with the following Pratt & Whitney Canada SB's: DOCUMENT NO. PAGE ISSUE/REVISION DATE SB 20341R2 1-4 Rev. 2 Sept. 3, 1991 Total Pages: 4 SB 20412 1-8 Original Nov. 27, 1989 Total Pages: 8 SB 20417R2 1-7 Rev. 2 Aug. 20, 1990 Total Pages: 7 SB 20419R3 1-6 Rev. 3 Nov. 26, 1990 Total Pages: 6 SB 20436 1-3 Original Mar. 6, 1989 Total Pages: 3 SB 20456R3 1-3 Rev. 3 Aug. 20, 1990 4 Rev. 1 Oct. 12, 1989 5 Rev. 2 Apr. 30, 1990 6-8 Original Jun. 21, 1989 Total Pages: 8 SB 20604R1 1-7 Rev. 1 Feb. 25, 1991 Total Pages: 7 SB 20726 1-3 Original Feb. 19, 1990 Total Pages: 3 SB 20742R4 1-4 Rev. 4 June 17, 1991 Total Pages: 4 SB 20869R1 1-6 Rev. 1 Apr. 26, 1991 Total Pages: 6 SB 20872R2 1-30 Rev. 2 July 8, 1991 Total Pages: 30 SB 20873R3 1-7 Rev. 3 Apr. 8, 1991 Total Pages: 7 SB 20886R2 1-6 Rev. 2 Feb. 11, 1991 Total Pages: 6 SB 20896R3 1-9 Rev. 3 Aug. 26, 1991 Total Pages: 9 SB 20979 1-7 Original Apr. 29, 1991 Total Pages: 7 This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Pratt & Whitney Canada, Technical Publications Department, 1000 Marie Victorin, Longueuil, Quebec J4G 1A1. Copies may be inspected at the FAA, New England Region, Office of the Assistant Chief Counsel, 12 New England Executive Park, Room 311, Burlington, Massachusetts, or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, D.C. (h) This amendment becomes effective on July 27, 1992. FOOTER:
Document Text
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AD Final Rules - DRS_92-01-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-01-08 Document Type: AD Final Rules Docket Number: 90-ANE-29 Subject Heading: PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines Subject: High Pressure Rotor Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/27/1992 Make: Pratt & Whitney Canada Corp. Model: PW118 | PW118A | PW120 | PW120A | PW121 | PW123 | PW124B | PW125B 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: 92-01-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-ANE-29 AMENDMENT: 39-8132 AD NUMBER: 92-01-08 SUBJECT HEADING: PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines ACTION: SUMMARY: DATES: Effective July 27, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-01-08 PRATT & WHITNEY CANADA: Amendment 39-8132. Docket No. 90-ANE-29. Applicability: Pratt & Whitney Canada (PWC) PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B model turboprop engines, with specific engine serial numbers noted in the applicable service bulletins (SB). Affected engines are installed in, but not limited to, the Aerospatiale ATR-42, and ATR-72, British Aerospace ATP, DeHavilland of Canada DHC-8, Embraer EMB-120, Canadair CL-215T, and Fokker 50 aircraft. Compliance: Required at the next engine module overhaul, hot section inspection (HSI), or within 36 months from the effective date of this airworthiness directive (AD), whichever occurs first, unless accomplished previously. To prevent seizure of the high pressure rotor, and subsequent inability to restart the engine inflight, accomplish the following: (a) Rework or replace with a serviceable part, the high pressure turbine front cover in accordance with the requirements of any of the following PWC SBs, as applicable: SB 20417, Revision 2, dated August 20, 1990, SB 20412, dated November 27, 1989; SB 20604, Revision 1, dated February 25, 1991; or SB 20979, dated April 29, 1991. (b) Rework the low pressure turbine stator vane assembly in accordance with the requirements of PWC SB 20456, Revision 3, dated August 20, 1990. (c) For engines incorporating the "triple segmented" high pressure vane ring segment assembly, Part Number (P/N) 3037761, rework or replace the high pressure vane segments as follows: (1) For PW115, PW118, PW120, PW120A, and PW121 model turboprop engines, rework or replace with a serviceable part in accordance with the requirements of either of the following PWC SBs, as applicable: SB 20419, Revision 3, dated November 26, 1990; or SB 20886, Revision 2, dated February 11, 1991. (2) For PW118A, PW123, PW124B, and PW125B model turboprop engines, rework or replace with a serviceable part in accordance with the requirements of any of the following PWC SBs, as applicable: SB 20419, Revision 3, dated November 26, 1990; SB 20726, dated February 19, 1990; SB 20742, Revision 4, dated June 12, 1991; SB 20886, Revision 2, dated February 11, 1991; or SB 20869, Revision 1, dated April 26, 1991. (d) For engines incorporating the "triple segmented" high pressure vane ring segment assembly, P/N 3037761, rework or replace with a serviceable part, the cooling air nozzle housing assembly as follows: (1) For PW115, PW118, PW120, PW120A, and PW121 model turboprop engines, rework or replace with a serviceable part in accordance with the requirements of any of the following PWC SB's, as applicable: SB 20341, Revision 2, dated September 3, 1991, SB 20436, dated March 6, 1989, or SB 20873, Revision 3, dated April 8, 1991. (2) For PW118A, PW123, PW124B, and PW125B model turboprop engines, rework or replace with a serviceable part in accordance with the requirements of any of the following PWC SB's, as applicable: SB 20341, Revision 2, dated September 3, 1991, SB 20436, dated March 6, 1989, SB 20873, Revision 3, dated April 8, 1991, SB 20896, Revision 3, dated August 26, 1991, or SB 20872, Revision 2, dated July 8, 1991. (e) An alternative method of compliance or adjustment of the compliance time, that provides an acceptable level of safety may be used if approved by the Manager, Engine Certification Office, Engine and Propeller Directorate. The request should be forwarded through an FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Engine Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Engine Certification Office. (f) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (g) The engine modifications shall be done in accordance with the following Pratt & Whitney Canada SB's: DOCUMENT NO. PAGE ISSUE/REVISION DATE SB 20341R2 1-4 Rev. 2 Sept. 3, 1991 Total Pages: 4 SB 20412 1-8 Original Nov. 27, 1989 Total Pages: 8 SB 20417R2 1-7 Rev. 2 Aug. 20, 1990 Total Pages: 7 SB 20419R3 1-6 Rev. 3 Nov. 26, 1990 Total Pages: 6 SB 20436 1-3 Original Mar. 6, 1989 Total Pages: 3 SB 20456R3 1-3 Rev. 3 Aug. 20, 1990 4 Rev. 1 Oct. 12, 1989 5 Rev. 2 Apr. 30, 1990 6-8 Original Jun. 21, 1989 Total Pages: 8 SB 20604R1 1-7 Rev. 1 Feb. 25, 1991 Total Pages: 7 SB 20726 1-3 Original Feb. 19, 1990 Total Pages: 3 SB 20742R4 1-4 Rev. 4 June 17, 1991 Total Pages: 4 SB 20869R1 1-6 Rev. 1 Apr. 26, 1991 Total Pages: 6 SB 20872R2 1-30 Rev. 2 July 8, 1991 Total Pages: 30 SB 20873R3 1-7 Rev. 3 Apr. 8, 1991 Total Pages: 7 SB 20886R2 1-6 Rev. 2 Feb. 11, 1991 Total Pages: 6 SB 20896R3 1-9 Rev. 3 Aug. 26, 1991 Total Pages: 9 SB 20979 1-7 Original Apr. 29, 1991 Total Pages: 7 This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Pratt & Whitney Canada, Technical Publications Department, 1000 Marie Victorin, Longueuil, Quebec J4G 1A1. Copies may be inspected at the FAA, New England Region, Office of the Assistant Chief Counsel, 12 New England Executive Park, Room 311, Burlington, Massachusetts, or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, D.C. (h) This amendment becomes effective on July 27, 1992. FOOTER:
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Retrieved: Apr 8, 2026
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