| AD Number | 93-13-11 | Status | Active |
| Effective Date | November 08, 1993 | Issue Date | Not specified |
| Docket Number | 91-ANE-46 | Amendment | 39-8624 |
| Product Type | ["Engine"] | Product Subtype | Not specified |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Honeywell International Inc. |
| Model(s) | LTP 101-600 LTP 101-600A LTP 101-600A-1A LTP 101-700A-1A LTS101-600A LTS101-600A-1 LTS101-600A-2 LTS101-600A-3 LTS101-600B LTS101-600B-3 LTS101-650A LTS101-650A-1 LTS101-650A-2 LTS101-650B-1 LTS101-650B-1A LTS101-650C LTS101-650C-2 LTS101-650C-3 LTS101-650C-3A LTS101-750A-1 LTS101-750A-3 LTS101-750B-1 LTS101-750B-2 LTS101-750C-1 LTS101-850B-2 |
93-13-11 TEXTRON LYCOMING: Amendment 39-8624. Docket 91-ANE-46.
Applicability: Textron Lycoming LTS 101 series turboshaft engines and LTP 101 series turboprop engines installed on but not limited to Aerospatiale AS 350 and SA366G, Bell 222, and Messerschmitt-Bolkow-Blohm (MBB) BK117 helicopters; or Piaggio P166-DL3 and Airtractor AT302 airplanes.
Compliance: Required as indicated, unless accomplished previously.
To prevent gas generator turbine rotor disk failure, uncontained engine failure, and possible damage to the aircraft, accomplish the following:
(a) Remove from service and replace with a serviceable part, gas generator turbine rotor disks in accordance with the following schedule based on disk cycles since new (CSN) on the effective date of this AD, but not to exceed the total operating hour service life limits established in Textron Lycoming Service Bulletin (SB) No. LT 101-71-00-0002, Revision 12, dated May 31, 1991:
(1) For Model LTS 101 series turboshaft engines with gas generator turbine rotor disks identified by Part Numbers (P/N) 4-111-015-04 or 4-111-015-09:
(i) Replace disks with 6,800 or more CSN within 100 cycles in service (CIS) or 1 month after the effective date of this AD, whichever occurs first, but not to exceed 7,500 CSN.
(ii) Replace disks with 6,500 or more CSN but less than 6,800 CSN within 200 CIS, or 3 months after the effective date of this AD, whichever occurs first.
(iii) Replace disks with 6,000 or more CSN but less than 6,500 CSN, within 400 CIS, or 6 months after the effective date of this AD, whichever occurs first.
(iv) Replace disks with 5,500 or more CSN but less than 6,000 CSN, within 600 CIS, or 9 months after the effective date of this AD, whichever occurs first.
(v) Replace disks with 5,000 or more CSN but less than 5,500 CSN, within 800 CIS, or 12 months after the effective date of this AD, whichever occurs first.
(vi) Replace disks with 4,000 or more CSN but less than 5,000 CSN, within 1,000 CIS, or 15 months after the effective date of this AD, whichever occurs first.
(vii) Replace disks with less than 4,000 CSN before exceeding 5,000 CSN.
(2) For Textron Lycoming Model LTP 101 series turboprop engines with gas generator turbine rotor disks identified by P/N 4-111-015-04 or P/N 4-111-015-09:
(i) Replace disks with 5,000 or more CSN within 100 CIS, or 3 months after the effective date of this AD, whichever occurs first, but not to exceed 5,500 CIS.
(ii) Replace disks with 4,000 or more CSN but less than 5,000 CSN, within 200 CIS, or 6 months after the effective date of this AD, whichever occurs first.
(iii) Replace disks with 3,400 or more CSN but less than 4,000 CSN, within 300 CIS, or 9 months after the effective date of this AD, whichever occurs first.
(iv) Replace disks with 3,000 or more CSN but less than 3,400 CSN, within 400 CIS, or 12 months after the effective date of this AD, whichever occurs first.
(v) Replace disks with less than 3,000 CSN before exceeding 3,400 CSN.
(3) For Textron Lycoming Model LTS 101 series turboshaft engines with gas generator turbine rotor disks identified by P/N 4-111-015-14, replace disks before exceeding 6,300 CSN.
(b) 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. The request should be forwarded through an FAA 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.
(c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the aircraft to a location where the requirements of this AD can be accomplished.
(d) The total operating hour servicelife limit shall be established in accordance with the following Textron Lycoming service bulletin:
Document No.
Pages
Revision
Date
LT 101-71-00-0002
1-16
12
May 31, 1991
Total Pages: 16.
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 Textron Lycoming, 550 Main Street, Stratford, CT 06497. Copies may be inspected at the FAA, New England Region, Office of the Assistant Chief Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street NW., suite 700, Washington, DC.
(e) This amendment becomes effective on November 8, 1993.